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Books > Science & Mathematics > Physics > Applied physics & special topics > Astrophysics

Astrophysics: Theories and Applications (Hardcover): Audria Baldwin Astrophysics: Theories and Applications (Hardcover)
Audria Baldwin
R3,356 R2,950 Discovery Miles 29 500 Save R406 (12%) Ships in 10 - 15 working days
Ionospheric Multi-Spacecraft Analysis Tools - Approaches for Deriving Ionospheric Parameters (Paperback, 1st ed. 2020): Malcolm... Ionospheric Multi-Spacecraft Analysis Tools - Approaches for Deriving Ionospheric Parameters (Paperback, 1st ed. 2020)
Malcolm Wray Dunlop, Hermann Luhr
R1,470 Discovery Miles 14 700 Ships in 10 - 15 working days

This open access book provides a comprehensive toolbox of analysis techniques for ionospheric multi-satellite missions. The immediate need for this volume was motivated by the ongoing ESA Swarm satellite mission, but the tools that are described are general and can be used for any future ionospheric multi-satellite mission with comparable instrumentation. In addition to researching the immediate plasma environment and its coupling to other regions, such a mission aims to study the Earth's main magnetic field and its anomalies caused by core, mantle, or crustal sources. The parameters for carrying out this kind of work are examined in these chapters. Besides currents, electric fields, and plasma convection, these parameters include ionospheric conductance, Joule heating, neutral gas densities, and neutral winds.

Astroparticle Physics and Cosmology - Perspectives in the Multimessenger Era (Paperback, 1st ed. 2020): Subhendra Mohanty Astroparticle Physics and Cosmology - Perspectives in the Multimessenger Era (Paperback, 1st ed. 2020)
Subhendra Mohanty
R2,073 Discovery Miles 20 730 Ships in 10 - 15 working days

Cosmology and astroparticle physics have seen an avalanche of discoveries in the past decade (IceCube - high energy neutrinos, LIGO - gravitational waves, Fermi- gamma-ray telescope, Xenon-1T - dark matter detection, PLANCK- cosmic microwave radiation, EHT picture of black hole, SDSS -galaxy surveys), all of which require a multidisciplinary background for analyzing the phenomena. The arena for testing particle physics models is in the multimessenger astronomical observations and at the same time cosmology now requires a particle physics basis for explaining many phenomena. This book discusses the theoretical tools of particle physics and general relativity which are essential for understanding and correlating diverse astronomical observations.

Planetary Systems - Detection, Formation and Habitability of Extrasolar Planets (Hardcover): Marc Ollivier, Therese Encrenaz,... Planetary Systems - Detection, Formation and Habitability of Extrasolar Planets (Hardcover)
Marc Ollivier, Therese Encrenaz, Francoise Roques, Franck Selsis, Fabienne Casoli
R4,276 Discovery Miles 42 760 Ships in 12 - 17 working days

Over the past ten years, the discovery of extrasolar planets has opened a new field of astronomy, and this area of research is rapidly growing, from both the observational and theoretical point of view. The presence of many giant exoplanets in the close vicinity of their star shows that these newly discovered planetary systems are very different from the solar system. New theoretical models are being developed in order to understand their formation scenarios, and new observational methods are being implemented to increase the sensitivity of exoplanet detections. In the present book, the authors address the question of planetary systems from all aspects. Starting from the facts (the detection of more than 300 extraterrestrial planets), they first describe the various methods used for these discoveries and propose a synthetic analysis of their global properties. They then consider the observations of young stars and circumstellar disks and address the case of the solar system as a specific example, different from the newly discovered systems. Then the study of planetary systems and of exoplanets is presented from a more theoretical point of view. The book ends with an outlook to future astronomical projects, and a description of the search for life on exoplanets. This book addresses students and researchers who wish to better understand this newly expanding field of research.

Modern Astrophysics (Hardcover): Cynthia Jefferson Modern Astrophysics (Hardcover)
Cynthia Jefferson
R3,445 R3,020 Discovery Miles 30 200 Save R425 (12%) Ships in 10 - 15 working days
The Quest for a Universal Theory of Life - Searching for Life As We Don't Know It (Hardcover, New title): Carol E. Cleland The Quest for a Universal Theory of Life - Searching for Life As We Don't Know It (Hardcover, New title)
Carol E. Cleland
R1,903 Discovery Miles 19 030 Ships in 12 - 17 working days

Integrating both scientific and philosophical perspectives, this book provides an informed analysis of the challenges of formulating a universal theory of life. Among the issues discussed are crucial differences between definitions and scientific theories and, in the context of examples from the history of science, how successful general theories develop. The central problem discussed is two-fold: first, our understanding of life is still tacitly wedded to an antiquated Aristotelian framework for biology; and second, there are compelling reasons for considering that familiar Earth life, which descends from a last universal common ancestor, is unrepresentative. What is needed are examples of life as we don't know it. Potential sources are evaluated, including artificial life, extraterrestrial life, and a shadow biosphere right here on Earth, and a novel strategy for searching for unfamiliar life in the absence of a definition or general theory is developed. The book is a valuable resource for graduate students and researchers studying the nature, origins, and extent of life in the universe.

Evolutionary Processes in Binary and Multiple Stars (Paperback): Peter Eggleton Evolutionary Processes in Binary and Multiple Stars (Paperback)
Peter Eggleton
R1,901 Discovery Miles 19 010 Ships in 12 - 17 working days

Binary systems of stars are as common as single stars. Stars evolve primarily by nuclear reactions in their interiors, but a star with a binary companion can also have its evolution influenced by the companion. Multiple star systems can exist stably for millions of years, but can ultimately become unstable as one star grows in radius until it engulfs another. This volume, first published in 2006, discusses the statistics of binary stars; the evolution of single stars; and several of the most important kinds of interaction between two (and even three or more) stars. Some of the interactions discussed are Roche-lobe overflow, tidal friction, gravitational radiation, magnetic activity driven by rapid rotation, stellar winds, magnetic braking and the influence of a distant third body on a close binary orbit. A series of mathematical appendices gives a concise but full account of the mathematics of these processes.

Introduction to High-Energy Astrophysics (Paperback): Stephan Rosswog, Marcus Bruggen Introduction to High-Energy Astrophysics (Paperback)
Stephan Rosswog, Marcus Bruggen
R1,334 Discovery Miles 13 340 Ships in 12 - 17 working days

High-energy astrophysics covers cosmic phenomena that occur under the most extreme physical conditions. It explores the most violent events in the Universe: the explosion of stars, matter falling into black holes, and gamma-ray bursts - the most luminous explosions since the Big Bang. Driven by a wealth of observations, there has been a large leap forward in our understanding of these phenomena. Exploring modern topics of high-energy astrophysics, such as supernovae, neutron stars, compact binary systems, gamma-ray bursts, and active galactic nuclei, this 2007 textbook is ideal for undergraduate students in high-energy astrophysics. It is a self-contained, relevant overview of this exciting field of research. Assuming a familiarity with basic physics, it introduces all other concepts, such as gas dynamics or radiation processes, in an instructive way. An extended appendix gives an overview of some of the most important high-energy astrophysics instruments, and each chapter ends with exercises.

Low Frequency Radio Astronomy and the LOFAR Observatory - Lectures from the Third LOFAR Data Processing School (Paperback,... Low Frequency Radio Astronomy and the LOFAR Observatory - Lectures from the Third LOFAR Data Processing School (Paperback, Softcover reprint of the original 1st ed. 2018)
George Heald, John McKean, Roberto Pizzo
R3,508 Discovery Miles 35 080 Ships in 10 - 15 working days

This book presents lecture materials from the Third LOFAR Data School, transformed into a coherent and complete reference book describing the LOFAR design, along with descriptions of primary science cases, data processing techniques, and recipes for data handling. Together with hands-on exercises the chapters, based on the lecture notes, teach fundamentals and practical knowledge. LOFAR is a new and innovative radio telescope operating at low radio frequencies (10-250 MHz) and is the first of a new generation of radio interferometers that are leading the way to the ambitious Square Kilometre Array (SKA) to be built in the next decade. This unique reference guide serves as a primary information source for research groups around the world that seek to make the most of LOFAR data, as well as those who will push these topics forward to the next level with the design, construction, and realization of the SKA. This book will also be useful as supplementary reading material for any astrophysics overview or astrophysical techniques course, particularly those geared towards radio astronomy (and radio astronomy techniques).

High Time-Resolution Astrophysics (Hardcover): Tariq Shahbaz, Jorge Casares Velazquez, Teodoro Munoz Darias High Time-Resolution Astrophysics (Hardcover)
Tariq Shahbaz, Jorge Casares Velazquez, Teodoro Munoz Darias
R3,457 Discovery Miles 34 570 Ships in 12 - 17 working days

High time-resolution astrophysics (HTRA) involves measuring and studying astronomical phenomena on timescales of seconds to milliseconds. Although many areas of astronomy, such as X-ray astronomy and pulsar observations, have traditionally required high time-resolution studies, HTRA techniques are now being applied to optical, infrared and gamma-ray wavelength regimes, due to the development of high efficiency detectors and larger telescopes that can gather photons at a higher rate. With lectures from eminent scientists aimed at young researchers and postdoctorate students in observational astronomy and astrophysics, this volume gives a practical overview and introduction to the tools and techniques of HTRA. Just as multi-spectral observations of astrophysical phenomena are already yielding new scientific results, many astronomers are optimistic that exploring the time domain will open up an important new frontier in observational astronomy over the next decade.

Einstein Gravity in a Nutshell (Hardcover): A. Zee Einstein Gravity in a Nutshell (Hardcover)
A. Zee
R2,604 R2,230 Discovery Miles 22 300 Save R374 (14%) Ships in 12 - 17 working days

This unique textbook provides an accessible introduction to Einstein's general theory of relativity, a subject of breathtaking beauty and supreme importance in physics. With his trademark blend of wit and incisiveness, A. Zee guides readers from the fundamentals of Newtonian mechanics to the most exciting frontiers of research today, including de Sitter and anti-de Sitter spacetimes, Kaluza-Klein theory, and brane worlds. Unlike other books on Einstein gravity, this book emphasizes the action principle and group theory as guides in constructing physical theories. Zee treats various topics in a spiral style that is easy on beginners, and includes anecdotes from the history of physics that will appeal to students and experts alike. He takes a friendly approach to the required mathematics, yet does not shy away from more advanced mathematical topics such as differential forms. The extensive discussion of black holes includes rotating and extremal black holes and Hawking radiation. The ideal textbook for undergraduate and graduate students, Einstein Gravity in a Nutshell also provides an essential resource for professional physicists and is accessible to anyone familiar with classical mechanics and electromagnetism. It features numerous exercises as well as detailed appendices covering a multitude of topics not readily found elsewhere. * Provides an accessible introduction to Einstein's general theory of relativity * Guides readers from Newtonian mechanics to the frontiers of modern research * Emphasizes symmetry and the Einstein-Hilbert action * Covers topics not found in standard textbooks on Einstein gravity * Includes interesting historical asides * Features numerous exercises and detailed appendices * Ideal for students, physicists, and scientifically minded lay readers * Solutions manual (available only to teachers)

The Importance of Binaries in the Formation and Evolution of Planetary Nebulae (Paperback, 1st ed. 2019): Henri M. J. Boffin,... The Importance of Binaries in the Formation and Evolution of Planetary Nebulae (Paperback, 1st ed. 2019)
Henri M. J. Boffin, David Jones
R1,709 Discovery Miles 17 090 Ships in 10 - 15 working days

It is now clear that a binary evolutionary pathway is responsible for a significant fraction of all planetary nebulae, with some authors even going so far as to claim that binarity may be a near requirement for the formation of an observable nebula. This has led to the requirement that textbooks most likely need to be rewritten. Building upon the review of Jones and Boffin in Nature Astronomy (2017), this Springer Brief takes a first step in this direction. It offers the first expanded presentation of all the theoretical and observational support for the importance of binarity in the formation of planetary nebulae, initially focusing on common envelope evolution but also covering wider binaries. This book emphasises the wider impact of the field, highlighting the critical role binary central stars of planetary nebulae have in understanding a plethora of astrophysical phenomena, including type Ia supernovae, chemically peculiar stars and circumbinary exoplanets.

High-Energy-Density Physics - Foundation of Inertial Fusion and Experimental Astrophysics (Paperback, Softcover reprint of the... High-Energy-Density Physics - Foundation of Inertial Fusion and Experimental Astrophysics (Paperback, Softcover reprint of the original 2nd ed. 2018)
R. Paul Drake
R2,662 Discovery Miles 26 620 Ships in 10 - 15 working days

The raw numbers of high-energy-density physics are amazing: shock waves at hundreds of km/s (approaching a million km per hour), temperatures of millions of degrees, and pressures that exceed 100 million atmospheres. This title surveys the production of high-energy-density conditions, the fundamental plasma and hydrodynamic models that can describe them and the problem of scaling from the laboratory to the cosmos. Connections to astrophysics are discussed throughout. The book is intended to support coursework in high-energy-density physics, to meet the needs of new researchers in this field, and also to serve as a useful reference on the fundamentals. Specifically the book has been designed to enable academics in physics, astrophysics, applied physics and engineering departments to provide in a single-course, an introduction to fluid mechanics and radiative transfer, with dramatic applications in the field of high-energy-density systems. This second edition includes pedagogic improvements to the presentation throughout and additional material on equations of state, heat waves, and ionization fronts, as well as problem sets accompanied by solutions.

The Birth of Star Clusters (Paperback, Softcover reprint of the original 1st ed. 2018): Steven Stahler The Birth of Star Clusters (Paperback, Softcover reprint of the original 1st ed. 2018)
Steven Stahler
R2,789 Discovery Miles 27 890 Ships in 10 - 15 working days

All stars are born in groups. The origin of these groups has long been a key question in astronomy, one that interests researchers in star formation, the interstellar medium, and cosmology. This volume summarizes current progress in the field, and includes contributions from both theorists and observers. Star clusters appear with a wide range of properties, and are born in a variety of physical conditions. Yet the key question remains: How do diffuse clouds of gas condense into the collections of luminous objects we call stars? This book will benefit graduate students, newcomers to the field, and also experienced scientists seeking a convenient reference.

Losing the Nobel Prize - A Story of Cosmology, Ambition, and the Perils of Science's Highest Honor (Paperback): Brian... Losing the Nobel Prize - A Story of Cosmology, Ambition, and the Perils of Science's Highest Honor (Paperback)
Brian Keating
R425 Discovery Miles 4 250 Ships in 12 - 17 working days

In Losing the Nobel Prize, cosmologist and inventor of the BICEP (Background Imaging of Cosmic Extragalactic Polarization) experiment Brian Keating tells the inside story of BICEP2's mesmerising discovery and the scientific drama that ensued. In an adventure story that spans the globe, Keating takes us on a personal journey of revelation and discovery, bringing to vivid life the highly competitive, take-no-prisoners, publish-or-perish world of modern science. Along the way, he provocatively argues that the Nobel Prize, instead of advancing scientific progress, may actually hamper it, encouraging speed and greed while punishing collaboration and bold innovation.

Astrometry and Astrophysics in the Gaia Sky (IAU S330) (Hardcover): Alejandra Recio-Blanco, Patrick de Laverny, Anthony G. A.... Astrometry and Astrophysics in the Gaia Sky (IAU S330) (Hardcover)
Alejandra Recio-Blanco, Patrick de Laverny, Anthony G. A. Brown, Timo Prusti
R2,967 Discovery Miles 29 670 Ships in 12 - 17 working days

Astrometry has historically been fundamental to all the fields of astronomy, driving many revolutionary scientific results. ESA's Gaia mission is astrometrically, photometrically and spectroscopically surveying the full sky, measuring around a billion stars to magnitude 20, to allow stellar distance and age estimations with unprecedented accuracy. With the complement of radial velocities, it will provide the full kinematic information of these targets, while the photometric and spectroscopic data will be used to classify objects and astrophysically characterize stars. IAU Symposium 330 reviews the first 2.5 years of Gaia activities and discusses the scientific results derived from the first Gaia data release (GDR1). This significant increase in the precision of the astrometric measurements has sharpened our view of the Milky Way and the physical processes involved in stellar and galactic evolution. To many, the Gaia revolution heralds a transformation comparable to the impact of the telescope's invention four centuries ago.

Solar Flare Loops: Observations and Interpretations (Paperback, Softcover reprint of the original 1st ed. 2018): Guangli Huang,... Solar Flare Loops: Observations and Interpretations (Paperback, Softcover reprint of the original 1st ed. 2018)
Guangli Huang, Victor F. Melnikov, Haisheng Ji, Zongjun Ning
R2,831 Discovery Miles 28 310 Ships in 10 - 15 working days

This book provides results of analysis of typical solar events, statistical analysis, the diagnostics of energetic electrons and magnetic field, as well as the global behavior of solar flaring loops such as their contraction and expansion. It pays particular attention to analyzing solar flare loops with microwave, hard X-ray, optical and EUV emissions, as well as the theories of their radiation, and electron acceleration/transport. The results concerning influence of the pitch-angle anisotropy of non-thermal electrons on their microwave and hard X-ray emissions, new spectral behaviors in X-ray and microwave bands, and results related to the contraction of flaring loops, are widely discussed in the literature of solar physics. The book is useful for graduate students and researchers in solar and space physics.

Astrophysics of Planet Formation (Hardcover, 2nd Revised edition): Philip J. Armitage Astrophysics of Planet Formation (Hardcover, 2nd Revised edition)
Philip J. Armitage
R2,191 R1,919 Discovery Miles 19 190 Save R272 (12%) Ships in 12 - 17 working days

Concise and self-contained, this textbook gives a graduate-level introduction to the physical processes that shape planetary systems, covering all stages of planet formation. Writing for readers with undergraduate backgrounds in physics, astronomy, and planetary science, Armitage begins with a description of the structure and evolution of protoplanetary disks, moves on to the formation of planetesimals, rocky, and giant planets, and concludes by describing the gravitational and gas dynamical evolution of planetary systems. He provides a self-contained account of the modern theory of planet formation and, for more advanced readers, carefully selected references to the research literature, noting areas where research is ongoing. The second edition has been thoroughly revised to include observational results from NASA's Kepler mission, ALMA observations and the JUNO mission to Jupiter, new theoretical ideas including pebble accretion, and an up-to-date understanding in areas such as disk evolution and planet migration.

Laika's Window - The Legacy of a Soviet Space Dog (Paperback): Kurt Caswell Laika's Window - The Legacy of a Soviet Space Dog (Paperback)
Kurt Caswell
R444 R401 Discovery Miles 4 010 Save R43 (10%) Ships in 9 - 15 working days

Laika began her life as a stray dog on the streets of Moscow and died in 1957 aboard the Soviet satellite Sputnik II. Initially the USSR reported that Laika, the first animal to orbit the earth, had survived in space for seven days, providing valuable data that would make future manned space flight possible. People believed that Laika died a painless death as her oxygen ran out. Only in recent decades has the real story become public: Laika died after only a few hours in orbit when her capsule overheated. Laika's Window positions Laika as a long overdue hero for leading the way to human space exploration. Kurt Caswell examines Laika's life and death and the speculation surrounding both. Profiling the scientists behind Sputnik II, he studies the political climate driven by the Cold War and the Space Race that expedited the satellite's development. Through this intimate portrait of Laika, we begin to understand what the dog experienced in the days and hours before the launch, what she likely experienced during her last moments, and what her flight means to history and to humanity. While a few of the other space dog flights rival Laika's in endurance and technological advancements, Caswell argues that Laika's flight serves as a tipping point in space exploration "beyond which the dream of exploring nearby and distant planets opened into a kind of fever from which humanity has never recovered." Examining the depth of human empathy-what we are willing to risk and sacrifice in the name of scientific achievement and our exploration of the cosmos, and how politics and marketing can influence it-Laika's Windowis also about our search to overcome loneliness and the role animals play in our drive to look far beyond the earth for answers.

An Introduction to the Atomic and Radiation Physics of Plasmas (Hardcover): G.J. Tallents An Introduction to the Atomic and Radiation Physics of Plasmas (Hardcover)
G.J. Tallents
R1,754 Discovery Miles 17 540 Ships in 12 - 17 working days

Plasmas comprise more than 99% of the observable universe. They are important in many technologies and are key potential sources for fusion power. Atomic and radiation physics is critical for the diagnosis, observation and simulation of astrophysical and laboratory plasmas, and plasma physicists working in a range of areas from astrophysics, magnetic fusion, and inertial fusion utilise atomic and radiation physics to interpret measurements. This text develops the physics of emission, absorption and interaction of light in astrophysics and in laboratory plasmas from first principles using the physics of various fields of study including quantum mechanics, electricity and magnetism, and statistical physics. Linking undergraduate level atomic and radiation physics with the advanced material required for postgraduate study and research, this text adopts a highly pedagogical approach and includes numerous exercises within each chapter for students to reinforce their understanding of the key concepts.

Advances in the Physics of Particles and Nuclei Volume 30 (Paperback, Softcover reprint of the original 1st ed. 2010): Douglas... Advances in the Physics of Particles and Nuclei Volume 30 (Paperback, Softcover reprint of the original 1st ed. 2010)
Douglas H. Beck, Dieter Haidt, John W. Negele
R1,469 Discovery Miles 14 690 Ships in 10 - 15 working days

The series Advances in the Physics of Particles and Nuclei (APPN) is devoted to the archiving, in printed high-quality book format, of the comprehensive, long shelf-life reviews published in The European Physical Journal A and C. APPN will be of benefit in particular to those librarians and research groups, who have chosen to have only electronic access to these journals. Occasionally, original material in review format and refereed by the series' editorial board will also be included. This volume contains the following four reviews: C.E. DeTar and U.M. Heller: QCD Thermodynamics from the Lattice B.R. Holstein: Hadronic Parity violation and Effective Field Theory M. Signore and D. Puy: Cosmic Microwave Background and First Molecules in the Early Universe S. Bethke: The 2009 World Average of alphas

From Quarks to the Universe - A Short Physics Course (Paperback, Softcover reprint of the original 2nd ed. 2016): Eleftherios... From Quarks to the Universe - A Short Physics Course (Paperback, Softcover reprint of the original 2nd ed. 2016)
Eleftherios N. Economou
R1,484 Discovery Miles 14 840 Ships in 10 - 15 working days

This book takes the reader for a short journey over the structures of matter showing that their main properties can be obtained even at a quantitative level with a minimum background knowledge including, besides first year calculus and physics, the extensive use of dimensional analysis and the three cornerstones of science, namely the atomic idea, the wave-particle duality and the minimization of energy as the condition for equilibrium. Dimensional analysis employing the universal physical constants and combined with "a little imagination and thinking", to quote Feynman, allow an amazing short-cut derivation of several quantitative results concerning the structures of matter. In the current 2nd edition, new material and more explanations with more detailed derivations were added to make the book more student-friendly. Many multiple-choice questions with the correct answers at the end of the book, solved and unsolved problems make the book also suitable as a textbook. This book is of interest to students of physics, engineering and other science and to researchers in physics, material science, chemistry and engineering who may find stimulating the alternative derivation of several real world results which sometimes seem to pop out the magician's hat.

Stardust Final Conference - Advances in Asteroids and Space Debris Engineering and Science (Paperback, Softcover reprint of the... Stardust Final Conference - Advances in Asteroids and Space Debris Engineering and Science (Paperback, Softcover reprint of the original 1st ed. 2018)
Massimiliano Vasile, Edmondo Minisci, Leopold Summerer, Peter Mcginty
R3,039 Discovery Miles 30 390 Ships in 10 - 15 working days

Space debris and asteroid impacts pose a very real, very near-term threat to Earth. In order to help study and mitigate these risks, the Stardust program was formed in 2013. This training and research network was devoted to developing and mastering techniques such as removal, deflection, exploitation, and tracking. This book is a collection of many of the topics addressed at the Final Stardust Conference, describing the latest in asteroid monitoring and how engineering efforts can help us reduce space debris. It is a selection of studies bringing together specialists from universities, research institutions, and industry, tasked with the mission of pushing the boundaries of space research with innovative ideas and visionary concepts. Topics covered by the Symposium: Orbital and Attitude Dynamics Modeling Long Term Orbit and Attitude Evolution Particle Cloud Modeling and Simulation Collision and Impact Modelling and Simulation, Re-entry Modeling and Simulation Asteroid Origins and Characterization Orbit and Attitude Determination Impact Prediction and Risk Analysis, Mission Analysis-Proximity Operations, Active Removal/Deflection Control Under Uncertainty, Active Removal/Deflection Technologies, and Asteroid Manipulation

Classical Pendulum Feels Quantum Back-Action (Paperback, Softcover reprint of the original 1st ed. 2016): Nobuyuki Matsumoto Classical Pendulum Feels Quantum Back-Action (Paperback, Softcover reprint of the original 1st ed. 2016)
Nobuyuki Matsumoto
R2,789 Discovery Miles 27 890 Ships in 10 - 15 working days

In this thesis, ultimate sensitive measurement for weak force imposed on a suspended mirror is performed with the help of a laser and an optical cavity for the development of gravitational-wave detectors. According to the Heisenberg uncertainty principle, such measurements are subject to a fundamental noise called quantum noise, which arises from the quantum nature of a probe (light) and a measured object (mirror). One of the sources of quantum noise is the quantum back-action, which arises from the vacuum fluctuation of the light. It sways the mirror via the momentum transferred to the mirror upon its reflection for the measurement. The author discusses a fundamental trade-off between sensitivity and stability in the macroscopic system, and suggests using a triangular cavity that can avoid this trade-off. The development of an optical triangular cavity is described and its characterization of the optomechanical effect in the triangular cavity is demonstrated. As a result, for the first time in the world the quantum back-action imposed on the 5-mg suspended mirror is significantly evaluated. This work contributes to overcoming the standard quantum limit in the future.

Diffuse Radio Foregrounds - All-Sky Polarisation, and Anomalous Microwave Emission (Paperback, Softcover reprint of the... Diffuse Radio Foregrounds - All-Sky Polarisation, and Anomalous Microwave Emission (Paperback, Softcover reprint of the original 1st ed. 2016)
Matias Vidal Navarro
R1,469 Discovery Miles 14 690 Ships in 10 - 15 working days

This extensive thesis work covers several topics, including intensity and polarization, focusing on a new polarization bias reduction method. Vidal studied data from the WMAP satellite, which is low signal-to-noise and as such has to be corrected for polarization bias. He presents a new method for correcting the data, based on knowledge of the underlying angle of polarization. Using this novel method, he sets upper limits for the polarization fraction of regions known to emit significant amounts of spinning dust emissions. He also studies the large-scale loops and filaments that dominate the synchrotron sky. The dominant features are investigated, including identification of several new features. For the North Polar Spur, a model of an expanding shell in the vicinity of the Sun is tested, which appears to fit the data. Implications for CMB polarization surveys are also discussed. In addition, Vidal presents interferometric observations of the dark cloud LDN 1780 at 31 GHz and shows that the spinning dust hypothesis can explain the radio properties observed.

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