Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-05-22
Phys.Rev.D78:063510,2008
Astronomy and Astrophysics
Astrophysics
7 pages, 4 figures, discussions on linear ISW effects added
Scientific paper
10.1103/PhysRevD.78.063510
We study the cosmic microwave background (CMB) anisotropy due to spherically symmetric nonlinear structures in flat universes with dust and a cosmological constant. By modeling a time-evolving spherical compensated void/lump by Lemaitre-Tolman-Bondi spacetimes, we numerically solve the null geodesic equations with the Einstein equations. We find that a nonlinear void redshifts the CMB photons that pass through it regardless of the distance to it. In contrast, a nonlinear lump blueshifts (or redshifts) the CMB photons if it is located near (or sufficiently far from) us. The present analysis comprehensively covers previous works based on a thin-shell approximation and a linear/second order perturbation method and the effects of shell thickness and full nonlinearity. Our results indicate that, if quasi-linear and large ($>100$Mpc) voids/lumps would exist, they could be observed as cold or hot spots with temperature variance $>10^{-5}$K in the CMB sky.
Sakai Nobuyuki
Taro Inoue Kaiki
No associations
LandOfFree
Cosmic Microwave Background Anisotropy from Nonlinear Structures in Accelerating Universes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmic Microwave Background Anisotropy from Nonlinear Structures in Accelerating Universes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic Microwave Background Anisotropy from Nonlinear Structures in Accelerating Universes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-510956