Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0708.1881)
· References in the article
· Citations to the Article (14) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (8)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The actual Rees-Sciama effect from the local universe
Authors:
Maturi, M.; Dolag, K.; Waelkens, A.; Springel, V.; Enßlin, T.
Affiliation:
AA(Zentrum für Astronomie, ITA, Universität Heidelberg, Albert-Überle-Str. 2, 69120 Heidelberg, Germany ; Max-Planck-Institute for Astrophysics, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany ), AB(Max-Planck-Institute for Astrophysics, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany), AC(Max-Planck-Institute for Astrophysics, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany), AD(Max-Planck-Institute for Astrophysics, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany), AE(Max-Planck-Institute for Astrophysics, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany)
Publication:
Astronomy and Astrophysics, Volume 476, Issue 1, December II 2007, pp.83-88 (A&A Homepage)
Publication Date:
12/2007
Origin:
EDP Sciences
Astronomy Keywords:
cosmic microwave background
DOI:
10.1051/0004-6361:20078478
Bibliographic Code:
2007A&A...476...83M

Abstract

Observations of the Cosmic Microwave Background (CMB) have revealed an unexpected quadrupole-octopole alignment along a preferred axis pointing toward the Virgo cluster. We here investigate whether this feature can be explained in the framework of the concordance model by secondary anisotropies produced by the non-linear evolution of the gravitational potential, the so-called Rees-Sciama (RS) effect. We focus on the effect caused by the local superclusters, which we calculate using a constrained high-resolution hydrodynamical simulation, based on the IRAS 1.2-Jy all-sky galaxy redshift survey, which reproduces the main structures of our Universe out to a distance of 110 Mpc from our Galaxy. The resulting RS effect peaks at low multipoles and has a minimum/maximum amplitude of -6.6 μK/ 1.9 μK. Even though its quadrupole is well aligned with the one measured for the CMB, its amplitude is not sufficient to explain the observed magnitude of the quadrupole/octopole alignment. To have an effect comparable to the actual CMB fluctuations, photons traversing the local cosmic structures would need to experience a five/ten times larger gravitational redshift than would be expected in a standard scenario with dark matter and Newtonian gravity. In addition, we analyze the WMAP-3 data with a linear matched filter in an attempt to determine an upper limit for the RS signal amplitude on large scales. We found that it is possible to infer a weak upper limit of 30 μK for its maximum amplitude.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints