The Cosmic Microwave Background Bispectrum as a Test of the Physics of Inflation and Probe of the Astrophysics of the Low-redshift Universe
نویسندگان
چکیده
1 Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA 2 School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540, USA 3 Astronomical Institute, Tôhoku University, Aoba, Sendai 980-8578, Japan 4 Keck Distinguished Visiting Professor, School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540, USA E-mail: [email protected], [email protected]
منابع مشابه
Evolution of Information and Complexity in an Ever-Expanding Universe
Using the usual definitions of information and entropy in quantum gravity and statistical mechanics and the existing views about the relation between information and complexity, we examine the evolution of complexity in an ever expanding universe.
متن کاملCosmic 21-cm Fluctuations as a Probe of Fundamental Physics
Fluctuations in high-redshift cosmic 21-cm radiation provide a new window for observing unconventional effects of high-energy physics in the primordial spectrum of density perturbations. In scenarios for which the initial state prior to inflation is modified at short distances, or for which deviations from scale invariance arise during the course of inflation, the cosmic 21-cm power spectrum ca...
متن کاملFormation of Large Structures in the Acceleration Universe with a Hybrid Expansion Law
In the current paper, we have studied the effect of dark energy on for-mation where dark energy exists in the background. For this purpose, we used both WMAP9 and Planck data to study how the radius changes with redshift in these mod-els. We used different data sets to fix the cosmological parameters to obtain a solution for a spherical region under collapse. The mechanism of structure formation f...
متن کاملMeasurement of the Cosmic Microwave Background Bispectrum on the Cobe Dmr Sky Maps
We measure the angular bispectrum of the cosmic microwave background (CMB) radiation anisotropy from the COBE Differential Microwave Radiometer (DMR) fouryear sky maps. The angular bispectrum is the harmonic transform of the three-point correlation function, analogous to the angular power spectrum, the harmonic transform of the two-point correlation function. First, we study statistical propert...
متن کاملar X iv : a st ro - p h / 05 09 21 6 v 1 8 S ep 2 00 5 Cosmology with Weak Lensing Surveys
Weak gravitational lensing is responsible for the shearing and magnification of the images of high-redshift sources due to the presence of intervening mass. Since the lensing effects arise from deflections of the light rays due to fluctuations of the gravitational potential, they can be directly related to the underlying density field of the large-scale structures. Weak gravitational surveys ar...
متن کامل