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Books > Science & Mathematics > Astronomy, space & time > Galaxies, clusters, intergalactic matter

Dynamical Evolution of Galaxies (Hardcover): Xiaolei Zhang Dynamical Evolution of Galaxies (Hardcover)
Xiaolei Zhang
R4,996 Discovery Miles 49 960 Ships in 12 - 19 working days

This research monograph presents a new dynamical framework for the study of secular morphological evolution of galaxies along the Hubble sequence. Classical approaches based on Boltzmann's kinetic equation, as well as on its moment-equation descendants the Euler and Navier-Stokes fluid equations, are inadequate for treating the maintenance and long-term evolution of systems containing self-organized structures such as galactic density-wave modes. A global and synthetic approach, incorporating correlated fluctuations of the constituent particles during a nonequilibrium phase transition, is adopted to supplement the continuum treatment. The cutting-edge research combining analytical, N-body simulational, and observational aspects, as well as the fundamental-physics connections it provides, make this work a valuable reference for researchers and graduate students in astronomy, astrophysics, cosmology, many-body physics, complexity theory, and other related fields. Contents Dynamical Drivers of Galaxy Evolution N-Body Simulations of Galaxy Evolution Astrophysical Implications of the Dynamical Theory Putting It All Together Concluding Remarks Appendix: Relation to Kinetics and Fluid Mechanics

Astrophysics and Space Science - Volume 255, 1997/1998 An International Journal of Astronomy, Astrophysics and Space Science... Astrophysics and Space Science - Volume 255, 1997/1998 An International Journal of Astronomy, Astrophysics and Space Science (Hardcover, Reprinted from ASTROPHYSICS AND SPACE SCIENCE, 255:1-2, 1998)
L.B.F.M. Waters, C. Waelkens, Karel A.Van Der Hucht, P. A. Zaal
R5,901 Discovery Miles 59 010 Ships in 10 - 15 working days

The successful launch on November 17, 1995 of ESA's Infrared Space Observatory (ISO) by means of an Ariane 4 carrier, has set in motion a true revolution in quantitative infrared astronomy. For the first time since the very successful IRAS mission in 1983, the astronomical community has uninterrupted access to the infrared part of the electromagnetic spectrum. The four focal plane instruments on board of ISO ( the camera ISOCAM, the photometerjcamera ISOPHOT, and the short and long wavelength spec trographs ISO-SWS and ISO-LWS), perform very well and live up to the high expectations all of us had at launch. In the spring of 1996, Thijs de Graauw (principal investigator of the SWS) first suggested the idea to organize a conference dedicated to ISO re sults in the area of stars and circumstellar matter, and coined the title ISO 's View on Stellar Evolution. At the first scientific meeting to highlight some of the early ISO results which was held in May of 1996 at ESA's laboratory ESTEC in Noordwijk, the Netherlands, the conference was announced and a preliminary science organizing committee was formed. The conference was held from July 1 to 4, 1997, in conference centre de Leeuwenhorst, Noord wijkerhout, the Netherlands. The conference was opened by the Director of ESA 's Science Programme, Professor R. Bonnet."

Foundations of Astrophysics (Hardcover): Barbara Ryden, Bradley M. Peterson Foundations of Astrophysics (Hardcover)
Barbara Ryden, Bradley M. Peterson
R2,021 Discovery Miles 20 210 Ships in 9 - 17 working days

Foundations of Astrophysics provides a contemporary and complete introduction to astrophysics for astronomy and physics majors. With a logical presentation and conceptual and quantitative end-of-chapter problems, the material is accessible to introductory astrophysics students taking a two-semester survey course. Starting with the motions of the solar system and a discussion of the interaction of matter and light, the authors explore the physical nature of objects in the solar system, and the exciting new field of exoplanets. The second half of their text covers stellar, galactic, and extragalactic astronomy, followed by a brief discussion of cosmology. This is a reissue of the original 2010 edition, which has established itself as one of the market-leading astrophysics texts, well known for its clarity and simplicity. It has introduced thousands of physical science students to the breadth of astronomy, and helped prepare them for more advanced studies.

The Cosmos Explained - A history of the universe from its beginning to today and beyond (Hardcover): Charles Liu The Cosmos Explained - A history of the universe from its beginning to today and beyond (Hardcover)
Charles Liu
R535 Discovery Miles 5 350 Ships in 12 - 19 working days

The Cosmos Explained is an exciting and beautifully designed book that charts the life of our universe from the Big Bang to the present day and beyond. Starting with the moment of the Big Bang-at exactly one ten-millionth of a trillionth of a trillionth of a trillionth of a second-this book charts a history of space and time all the way through the evolution of our solar system, the birth of stars and the formation of life on Earth, to the future of our galaxy and beyond. With deeply insightful and fascinating text by Hayden Planetarium Associate Professor Charles Liu, who also hosts the immensely popular StarTalk podcast, this book is an accessible and enthralling gateway into the mysteries of space, time and the universe. Pinpoint exactly where you are in space and time using the timeline at the bottom of every page, and explore the history of the cosmos and the science behind it through beautiful telescope images and striking illustrations. Packaged in a unique retro design that reflects the 1960s cosmonaut era but still feels modern and relevant today, this title is as rich with information as it is with stunning visualisations of the concepts and bodies detailed within. An ideal gift for anyone interested in space or curious about the cosmos, The Cosmos Explained is a unique and entertaining timeline of life, the universe, and everything!

Very Massive Stars in the Local Universe (Hardcover, 2015 ed.): Jorick S Vink Very Massive Stars in the Local Universe (Hardcover, 2015 ed.)
Jorick S Vink
R3,873 R3,591 Discovery Miles 35 910 Save R282 (7%) Ships in 12 - 19 working days

This book presents the status of research on very massive stars in the Universe. While it has been claimed that stars with over 100 solar masses existed in the very early Universe, recent studies have also discussed the existence and deaths of stars up to 300 solar masses in the local Universe. This represents a paradigm shift for the stellar upper-mass limit, which may have major implications far beyond the field of stellar physics. The book comprises 7 chapters, which describe this discipline and provide sufficient background and introductory content for graduate (PhD) students and researchers from different branches of astronomy to be able to enter this exciting new field of very massive stars.

From Black Clouds To Black Holes (Third Edition) (Hardcover, 3rd Revised edition): Jayant V. Narlikar From Black Clouds To Black Holes (Third Edition) (Hardcover, 3rd Revised edition)
Jayant V. Narlikar
R1,564 Discovery Miles 15 640 Ships in 12 - 19 working days

This book presents in a simple style the success story of modern astrophysics - how the application of known physics to models of stars can, together with the observational data, help us understand what stars are made of, how they live and how they die. The account is non-technical but scientifically accurate. It is interspersed with anecdotes and analogies to make the subject matter readable and understandable even to a lay reader with some basic scientific background.

External Galaxies and Quasi-Stellar Objects (Hardcover, 1971 ed.): D.S. Evans External Galaxies and Quasi-Stellar Objects (Hardcover, 1971 ed.)
D.S. Evans
R5,909 Discovery Miles 59 090 Ships in 10 - 15 working days

Proceedings of IAU Symposium No. 44 held in Uppsala, Sweden, August 10-14, 1970

A History Of The Universe In 21 Stars (and 3 Imposters) (Hardcover): Giles Sparrow A History Of The Universe In 21 Stars (and 3 Imposters) (Hardcover)
Giles Sparrow
R335 R299 Discovery Miles 2 990 Save R36 (11%) Ships in 5 - 10 working days

Expert science writer Giles Sparrow guides you through 21 stars you can see in the night sky and what they can teach us about our universe. On a clear evening, if you look up you can see thousands of stars shining in the dark sky, each with a story of their own. Taking 21 stars (and three imposters, that cheekily aren't technically stars), expert science writer Giles Sparrow offers a complete introduction to what is happening up in the night sky. Sparrow draws 'star maps' to help you easily identify the celestial bodies and then explains (for anyone not an astronomer themselves) what this particular pinprick of light can tell us about the birth, life and death of our universe. From red giants, quasars and supernovae to black holes, multiple stars and even our own Sun, this fascinating book tells the intriguing, inspiring and sometimes incredible story of how we came to unravel the mysteries of the cosmos, and what we learnt along the way. So look up at the sky and marvel at its wonders with this exciting new book.

Evolution of Stars and Stellar Populations (Paperback, New): Maurizio Salaris, Santi Cassisi Evolution of Stars and Stellar Populations (Paperback, New)
Maurizio Salaris, Santi Cassisi
R1,661 Discovery Miles 16 610 Ships in 12 - 19 working days

Evolution of Stars and Stellar Populations is a comprehensive presentation of the theory of stellar evolution and its application to the study of stellar populations in galaxies. Taking a unique approach to the subject, this self-contained text introduces first the theory of stellar evolution in a clear and accessible manner, with particular emphasis placed on explaining the evolution with time of observable stellar properties, such as luminosities and surface chemical abundances. This is followed by a detailed presentation and discussion of a broad range of related techniques, that are widely applied by researchers in the field to investigate the formation and evolution of galaxies.
This book will be invaluable for undergraduates and graduate students in astronomy and astrophysics, and will also be of interest to researchers working in the field of Galactic, extragalactic astronomy and cosmology.
* comprehensive presentation of stellar evolution theory
* introduces the concept of stellar population and describes "stellar population synthesis" methods to study ages and star formation histories of star clusters and galaxies.
* presents stellar evolution as a tool for investigating the evolution of galaxies and of the universe in general.

X-Ray Timing and Cosmic Gamma Ray Bursts, Volume 22 (Paperback, 2nd edition): Jean A. Swank X-Ray Timing and Cosmic Gamma Ray Bursts, Volume 22 (Paperback, 2nd edition)
Jean A. Swank
R2,283 Discovery Miles 22 830 Ships in 12 - 19 working days
Radiation from Black Holes, Future Missions to Primitive Bodies and Middle Atmospheric Fine Structures, Volume 19 (Paperback):... Radiation from Black Holes, Future Missions to Primitive Bodies and Middle Atmospheric Fine Structures, Volume 19 (Paperback)
C. Day Et Al
R2,212 Discovery Miles 22 120 Ships in 12 - 19 working days

The majority of this volume is devoted to the subject of high energy radiation from galactic and extragalactic black holes. The volume also covers future space missions to primitive bodies and fine structures in the middle atmosphere and their origin. In total, 27 papers are presented, the final two included in the appendix emanating from the previous COSPAR meeting in Washington.

Cosmology (Hardcover): Nicola Vittorio Cosmology (Hardcover)
Nicola Vittorio
R2,842 Discovery Miles 28 420 Ships in 12 - 19 working days

Modern cosmology has changed significantly over the years, from the discovery to the precision measurement era. The data now available provide a wealth of information, mostly consistent with a model where dark matter and dark energy are in a rough proportion of 3:7. The time is right for a fresh new textbook which captures the state-of-the art in cosmology. Written by one of the world's leading cosmologists, this brand new, thoroughly class-tested textbook provides graduate and undergraduate students with coverage of the very latest developments and experimental results in the field. Prof. Nicola Vittorio shows what is meant by precision cosmology, from both theoretical and observational perspectives. This book is divided into three main parts: Part I provides a pedagogical, but rigorous, general relativity-based discussion of cosmological models, showing the evidence for dark energy, the constraints from primordial nucleosynthesis and the need for inflation Part II introduces density fluctuations and their statistical description, discussing different theoretical scenarios, such as CDM, as well as observations Part III introduces the general relativity approach to structure formation and discusses the physics behind the CMB temperature and polarization pattern of the microwave sky Carefully adapted from the course taught by Prof. Vittorio at the University of Rome Tor Vergata, this book will be an ideal companion for advanced students undertaking a course in cosmology. Features: Incorporates the latest experimental results, at a time of rapid change in this field, with balanced coverage of both theoretical and experimental perspectives Each chapter is accompanied by problems, with detailed solutions The basics of tensor calculus and GR are given in the appendices

Galaxy Formation and Evolution (Hardcover, and ed.): Hyron Spinrad Galaxy Formation and Evolution (Hardcover, and ed.)
Hyron Spinrad
R2,993 Discovery Miles 29 930 Ships in 10 - 15 working days

An Astronomical Life - Observing the Depths of the Universe" Though science as a subject can be di?cult, what has been more important for me is that its practice can also be rewarding fun! This book is crafted to expose the reader to the excitement of modern observational cosmology through the study of galaxy evolution over space and cosmic time. Recent extragalactic research has led to many rapid advances in the ?eld. Even a suitable skeptic of certain pronouncements about the age and structure of the Universe should be pleased with the large steps that have been taken in furthering our understanding of the Universe since the early 1990's. My personal involvement in galaxy research goes back to the 1960's. At that point, galaxies were easily recognized and partially understood as organized c- lections of stars and gas. What their masses were presented a problem, which I supposed would just fade away. But fade it didn't. Distant active nuclei and quasars were discovered in the mid-1960's. A c- mon view of QSOs was that they have large redshifts, but what use are they for cosmology or normal galaxy astrophysics? I shared that conclusion. My expec- tions fell below their potential utility. In short, the Universe of our expectations rarely matches the Universe as it is discovered.

Death by Black Hole - And Other Cosmic Quandaries (Paperback): Neil De Grasse Tyson Death by Black Hole - And Other Cosmic Quandaries (Paperback)
Neil De Grasse Tyson
R427 R358 Discovery Miles 3 580 Save R69 (16%) Ships in 12 - 19 working days

Loyal readers of the monthly "Universe" essays in Natural History magazine have long recognized Neil deGrasse Tyson's talent for guiding them through the mysteries of the cosmos with clarity and enthusiasm. Bringing together more than forty of Tyson's favorite essays, ?Death by Black Hole? explores a myriad of cosmic topics, from what it would be like to be inside a black hole to the movie industry's feeble efforts to get its night skies right. One of America's best-known astrophysicists, Tyson is a natural teacher who simplifies the complexities of astrophysics while sharing his infectious fascination for our universe.

Black Holes in Binaries and Galactic Nuclei: Diagnostics, Demography and Formation - Proceedings of the ESO Workshop Held at... Black Holes in Binaries and Galactic Nuclei: Diagnostics, Demography and Formation - Proceedings of the ESO Workshop Held at Garching, Germany, 6-8 September 1999, in Honour of Riccardo Giacconi (Hardcover, 2001 ed.)
L. Kaper, E.P.J. van den Heuvel, P.A. Woudt
R1,996 R1,751 Discovery Miles 17 510 Save R245 (12%) Ships in 12 - 19 working days

The observational evidence for the existence of black holes has grown significantly over recent decades. Stellar-mass black holes are detected as X-ray sources in binary systems, while supermassive black holes, with masses more than a million times the mass of the Sun, lurk in the nuclei of galaxies. These proceedings provide a useful and up-to-date overview of the observations of black holes in binaries, in the center of the Milky Way, and in the nuclei of galaxies, presented by leading expert astronomers. Special attention is given to the formation (including the recent evidence from gamma-ray bursts), physical properties, and demographics of black holes.

The Northern Lights - Celestial Performances of the Aurora Borealis (Paperback): Daryl Pederson, Calvin Hall The Northern Lights - Celestial Performances of the Aurora Borealis (Paperback)
Daryl Pederson, Calvin Hall; Introduction by Ned Rozell
R559 R500 Discovery Miles 5 000 Save R59 (11%) Ships in 12 - 19 working days

Shot with ultra-high definition cameras, this book of amazing photographs showcases a period of unusually high solar activity in the Northern Lights. The northern lights, also known as the aurora borealis, put on remarkable shows of light and motion in high latitudes - Alaska being the perfect place to see them. These new photos take full advantage of the latest advances in photographic technology and especially active solar storms of the past several years that cause the lights. With 160 images that have never been collected in book form, we are witnessing the interaction of charged particles in the earth's atmosphere clash with electrons and protons released by the sun. Photographers Calvin Hall and Daryl Pederson are dedicated aurora borealis hunters, enduring frigid nights in remote locations to get the best shots. The results are amazing.

Mass-Losing Pulsating Stars and their Circumstellar Matter - Observations and Theory (Hardcover, 2003 ed.): Y. Nakada, M.... Mass-Losing Pulsating Stars and their Circumstellar Matter - Observations and Theory (Hardcover, 2003 ed.)
Y. Nakada, M. Honma, M. Seki
R4,443 Discovery Miles 44 430 Ships in 10 - 15 working days

Editing the proceedings of a scientific meeting is not an easy task. Sometimes people who give an excellent talk do not send the manuscript by the deadline. However, this time, thanks to the punctuality of all the participants, we have this excellent volume for the workshop on mass losing pulsating stars and their circumstellar matter prepared in time. Almost all of the oral presentations including the summary are collected in this volume. We regret that we cannot put in this volume a few posters that we failed to receive before the editorial work. The workshop was planned as a small meeting with less than fifty attendants because the city of Sendai was far from the most of the active institutions. However, the number of submitted papers exceeded the SOC's expectation; many interesting contributions had to be scheduled in the poster session. Still, the oral sessions were so tight that many participants might have felt frustrated for the shortage of discussions. The organizers of the workshop have to apologize to the attendants for the inconvenience caused from such a happy underestimate about the size of the workshop."

Wild Signs and Star Paths - 52 keys that will open your eyes, ears and mind to the world around you (Paperback): Tristan Gooley Wild Signs and Star Paths - 52 keys that will open your eyes, ears and mind to the world around you (Paperback)
Tristan Gooley 1
R395 R358 Discovery Miles 3 580 Save R37 (9%) Ships in 9 - 17 working days

'A paean to the beauty and majesty of nature, especially the nature we overlook in our back gardens and local parks... And like all the best books, it makes the world around you a lot more interesting' - Spectator 'Beautifully written... I promise you will feel more in tune with the world around after reading only one chapter of Wild Signs and Star Paths, let alone the book in its entirety' - Royal Institute of Navigation 'A beautifully written almanac of tricks and tips that we've lost along the way' - Observer Tristan Gooley, author of the internationally bestselling How To Read Water and The Walker's Guide to Outdoor Clues & Signs, shows how it is possible to achieve a level of outdoors awareness that will enable you to sense direction from stars and plants, forecast weather from woodland sounds and predict the next action of an animal from its body language - instantly. Although once common, this now rare awareness would be labelled by many as a 'sixth sense'. We have become so distanced from this way of experiencing our environment that it may initially seem hard to believe that it is possible, but Tristan Gooley uses a collection of 'keys' to show how everyone can develop this ability and enjoy the outdoors in an exciting way - one that is both new and ancient.

An Introduction to the Physics of Interstellar Dust (Hardcover): Endrik Krugel An Introduction to the Physics of Interstellar Dust (Hardcover)
Endrik Krugel
R5,555 Discovery Miles 55 550 Ships in 12 - 19 working days

Streamlining the extensive information from the original, highly acclaimed monograph, this new An Introduction to the Physics of Interstellar Dust provides a concise reference and overview of interstellar dust and the interstellar medium. Drawn from a graduate course taught by the author, a highly regarded figure in the field, this all-in-one book emphasizes astronomical formulae and astronomical problems to give a solid foundation for the further study of interstellar medium. Covering all phenomena associated with cosmic dust, this inclusive text eliminates the need to consult special physical literature by providing a comprehensive introduction in one source. The book addresses the absorption and scattering of dust, its creation in old stars, as well as emission, cohesion, and electrical charge. With strong attention to detail, the author facilitates a complete understanding from which to build a more versatile application and manipulation of the information. Providing insightful explanations for the utilization of many formulae, the author instructs in the effective investigation of astronomical objects for determining basic parameters. The book offers numerous figures displaying basic properties of dust such as optical constants, specific heat, and absorption and scattering coefficients making it accessible for the reader to apply these numbers to the problem at hand. There is an extensive section and comprehensive introduction to radiative transfer in a dusty medium with many practical pieces of advice and ample illustrations to guide astronomers wishing to implement radiative transfer code themselves. An unparalleled amount of astronomical information in an accessible andpalatable resource, An Introduction to the Physics of Interstellar Dust provides the most complete foundational reference available on the subject.

Interior Modelling of Massive Stars in Multiple Systems (Paperback, 1st ed. 2021): Cole Johnston Interior Modelling of Massive Stars in Multiple Systems (Paperback, 1st ed. 2021)
Cole Johnston
R4,571 Discovery Miles 45 710 Ships in 10 - 15 working days

This thesis by Cole Johnston brings novel insights into the inner workings of young massive stars. By bridging the observational fields of binary stars and asteroseismology this thesis uses state of the art statistical techniques to scrutinise theories of modern stellar astrophysics. Developing upon the commonly used isochrone fitting methodology, the author introduces the idea of isochrone cloud fitting in order to account for the full breadth of physics observed in stars. The author combines this methodology with gravity mode asteroseismic analysis to asses the level of chemical mixing deep within the stellar core in order to determine the star's age and core mass. Wrapped into a robust statistical framework to account for correlations, this methodology is employed to analyse individual stars, multiple systems, and clusters alike to demonstrate that chemical mixing has dramatic impact on stellar structure and evolution.

A Brief Welcome to the Universe - A Pocket-Sized Tour (Paperback): Neil De Grasse Tyson, Michaela Strauss, J. Richard Gott A Brief Welcome to the Universe - A Pocket-Sized Tour (Paperback)
Neil De Grasse Tyson, Michaela Strauss, J. Richard Gott
R359 R333 Discovery Miles 3 330 Save R26 (7%) Ships in 10 - 15 working days

A pocket-style edition based on the New York Times bestseller A Brief Welcome to the Universe offers a breathtaking tour of the cosmos, from planets, stars, and galaxies to black holes and time loops. Bestselling authors and acclaimed astrophysicists Neil deGrasse Tyson, Michael A. Strauss, and J. Richard Gott take readers on an unforgettable journey of exploration to reveal how our universe actually works. Propelling you from our home solar system to the outermost frontiers of space, this book builds your cosmic insight and perspective through a marvelously entertaining narrative. How do stars live and die? What are the prospects of intelligent life elsewhere in the universe? How did the universe begin? Why is it expanding and accelerating? Is our universe alone or part of an infinite multiverse? Exploring these and many other questions, this pocket-friendly book is your passport into the wonders of our evolving cosmos.

The Physics of Interstellar Dust (Hardcover): Endrik Krugel The Physics of Interstellar Dust (Hardcover)
Endrik Krugel
R7,974 Discovery Miles 79 740 Ships in 12 - 19 working days

Interstellar dust grains catalyse chemical reactions, absorb, scatter, polarise and re-radiate starlight and constitute the building blocks for the formation of planets. Understanding this interstellar component is therefore of primary importance in many areas of astronomy & astrophysics. For example, observers need to understand how dust effects light passing through molecular clouds. Astrophysicists wish to comprehend how dust enables the collapse of clouds or how it determines the spectral behaviour of protostars, star forming regions or whole galaxies. This book gives a thorough theoretical description of the fundamental physics of interstellar dust: its composition, morphology, size distribution, dynamics, optical and thermal properties, alignment, polarisation, scattering, radiation and spectral features.
This encyclopedic book provides the basic physics towards understanding the solid matter in interstellar space. It includes all the necessary physics, including solid state physics, radiative transport, optical properties, thermodynamics, statistical mechanics and quantum mechanics. It then uses all of this basic physics in the specific case of dust grains in the interstellar medium.
Interstellar dust clouds catalyze simple chemical reactions, absorbs, scatters, polarizes and re-radiates starlight and forms the building blocks for planet and stellar formation. Understanding this interstellar medium is then of primary importance in many areas of astronomy & astrophysics. For example observers need to understand how it effects light passing through dust and molecular clouds, astrophysicists need to comprehend the formation and structure of dust clouds and how it collapses to form stars and planets.
Written in an accessible and descriptive manner, this will be essential supplementary reading for advanced undergraduate and graduate students taking courses on the interstellar medium and active researchers in need of a single source of well illustrated and detailed information.

Dark Sky, Dark Matter (Hardcover): J.M. Overduin, P.S. Wesson Dark Sky, Dark Matter (Hardcover)
J.M. Overduin, P.S. Wesson
R7,627 Discovery Miles 76 270 Ships in 12 - 19 working days

Olbers' paradox states that given the Universe is unbounded, governed by the standard laws of physics, and populated by light sources, the night sky should be ablaze with light. Obviously this is not so. However, the paradox does not lie in nature but in our understanding of physics. A Universe with a finite age, such as follows from big-bang theory, necessarily has galaxies of finite age. This means we can only see some of the galaxies in the Universe, which is the main reason why the night sky is dark. Just how dark can be calculated using the astrophysics of galaxies and stars and the dynamics of relativistic cosmology.
We know from the dynamics of individual galaxies and clusters of galaxies that the majority of matter that exerts gravitational forces is not detectable by conventional telescopes. This dark matter could have many forms, and candidates include various types of elementary particles as well as vacuum fluctuations, black holes, and others. Most of these candidates are unstable to decay and produce photons. So dark matter does not only affect the dynamics of the Universe, but the intensity of intergalactic radiation as well. Conversely, we can use observations of background radiation to constrain the nature and density of dark matter.
By comparing observational data with cosmological theory based on general relativity and particle physics, Dark Sky, Dark Matter reviews our present understanding of the universe and the astrophysics of the night sky and dark matter.

The Transient Radio Sky (Hardcover, 2011): Evan Francis Keane The Transient Radio Sky (Hardcover, 2011)
Evan Francis Keane
R2,878 Discovery Miles 28 780 Ships in 10 - 15 working days

The high time-resolution radio sky represents unexplored astronomical territory. This thesis presents a study of the transient radio sky, focussing on millisecond scales. As such, the work is concerned primarily with neutron stars. In particular this research concentrates on a recently identified group of neutron stars, known as RRATs, which exhibit radio bursts every few minutes to every few hours. After analysing neutron star birthrates, a re-analysis of the Parkes Multibeam Pulsar Survey is described which has resulted in the discovery of 19 new transient radio sources. Of these, 12 have been seen to repeat and a follow-up campaign of observations has been undertaken. These studies have greatly increased our knowledge of the rotational properties of RRATs and enable us to conclude that they are pulsars with extreme nulling and/or pulse-to-pulse modulation. Although the evolution of neutron stars post-supernova is not yet understood, it seems that RRATs fit into the emerging picture in which pulsar magnetospheres switch between stable configurations.

The Evolution of Galaxies - III - From Simple Approaches to Self-Consistent Models (Hardcover, Reprinted from ASTROPHYSICS AND... The Evolution of Galaxies - III - From Simple Approaches to Self-Consistent Models (Hardcover, Reprinted from ASTROPHYSICS AND SPACE SCIENCE, 284:2, 2003)
G. Hensler, G. Stasinska, S. Harfst, P. Kroupa, C. Theis
R5,989 Discovery Miles 59 890 Ships in 10 - 15 working days

Galaxies have a history: distant galaxies, formed early in the life of the universe, differ from the nearby ones. This book addresses the modeling of galaxy evolution from their cosmological formation to their presently observable structures, presenting the state of the art in the field.

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