Journal
PHYSICAL REVIEW D
Volume 78, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.063510
Keywords
-
Funding
- MEXT [18540248, 20740146]
- Grants-in-Aid for Scientific Research [20740146, 18540248] Funding Source: KAKEN
Ask authors/readers for more resources
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 quasilinear and large (greater than or similar to 100 Mpc) voids/lumps would exist, they could be observed as cold or hot spots with temperature variance greater than or similar to 10(-5) K in the CMB sky.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available