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Probing Cosmic Dark Matter and Dark Energy with Weak Gravitational Lensing Statistics (Paperback, Softcover reprint of the original 1st ed. 2016)
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Probing Cosmic Dark Matter and Dark Energy with Weak Gravitational Lensing Statistics (Paperback, Softcover reprint of the original 1st ed. 2016)
Series: Springer Theses
Expected to ship within 10 - 15 working days
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In this book the applicability and the utility of two statistical
approaches for understanding dark energy and dark matter with
gravitational lensing measurement are introduced. For cosmological
constraints on the nature of dark energy, morphological statistics
called Minkowski functionals (MFs) to extract the non-Gaussian
information of gravitational lensing are studied. Measuring lensing
MFs from the Canada-France-Hawaii Telescope Lensing survey
(CFHTLenS), the author clearly shows that MFs can be powerful
statistics beyond the conventional approach with the two-point
correlation function. Combined with the two-point correlation
function, MFs can constrain the equation of state of dark energy
with a precision level of approximately 3-4 % in upcoming surveys
with sky coverage of 20,000 square degrees. On the topic of dark
matter, the author studied the cross-correlation of gravitational
lensing and the extragalactic gamma-ray background (EGB). Dark
matter annihilation is among the potential contributors to the EGB.
The cross-correlation is a powerful probe of signatures of dark
matter annihilation, because both cosmic shear and gamma-ray
emission originate directly from the same dark matter distribution
in the universe. The first measurement of the cross-correlation
using a real data set obtained from CFHTLenS and the Fermi Large
Area Telescope was performed. Comparing the result with theoretical
predictions, an independent constraint was placed on dark matter
annihilation. Future lensing surveys will be useful to constrain on
the canonical value of annihilation cross section for a wide range
of mass of dark matter annihilation. Future lensing surveys will be
useful to constrain on the canonical value of annihilation cross
section for a wide range of mass of dark matter.
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