|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measurements of the growth of structure and expansion rate at z=0.57 from anisotropic clustering | | Beth A. Reid
; Lado Samushia
; Martin White
; Will J. Percival
; Marc Manera
; Nikhil Padmanabhan
; Ashley J. Ross
; Ariel G. Sánchez
; Stephen Bailey
; Dmitry Bizyaev
; Adam S. Bolton
; Howard Brewington
; J. Brinkmann
; Joel R. Brownstein
; Antonio J. Cuesta
; Daniel J. Eisenstein
; James E. Gunn
; Klaus Honscheid
; Elena Malanushenko
; Viktor Malanushenko
; Claudia Maraston
; Cameron K. McBride
; Demitri Muna
; Robert C. Nichol
; Daniel Oravetz
; Kaike Pan
; Roland de Putter
; N. A. Roe
; Nicholas P. Ross
; David J. Schlegel
; Donald P. Schneider
; Hee-Jong Seo
; Alaina Shelden
; Erin S. Sheldon
; Audrey Simmons
; Ramin A. Skibba
; Stephanie Snedden
; Molly E. C. Swanson
; Daniel Thomas
; Jeremy Tinker
; Rita Tojeiro
; Licia Verde
; David A. Wake
; Benjamin A. Weaver
; David H. Weinberg
; Idit Zehavi
; Gong-Bo Zhao
; | | Date: |
29 Mar 2012 | | Abstract: | We analyze the anisotropic clustering of massive galaxies from the Sloan
Digital Sky Survey III Baryon Oscillation Spectroscopic Survey (BOSS) Data
Release 9 (DR9) sample, which consists of 264,283 galaxies in the redshift
range 0.43 < z < 0.7 spanning 3,275 square degrees. Both peculiar velocities
and errors in the assumed redshift-distance relation ("Alcock-Paczynski
effect") generate correlations between clustering amplitude and orientation
with respect to the line-of-sight. Together with the sharp baryon acoustic
oscillation (BAO) standard ruler, our measurements of the broadband shape of
the monopole and quadrupole correlation functions simultaneously constrain the
comoving angular diameter distance (2190 +/- 61 Mpc) to z=0.57, the Hubble
expansion rate at z=0.57 (92.4 +/- 4.5 km/s/Mpc), and the growth rate of
structure at that same redshift (d sigma8/d ln a = 0.43 +/- 0.069). Our
analysis provides the best current direct determination of both DA and H in
galaxy clustering data using this technique. If we further assume a LCDM
expansion history, our growth constraint tightens to d sigma8/d ln a = 0.415
+/- 0.034. In combination with the cosmic microwave background, our
measurements of DA, H, and growth all separately require dark energy at z >
0.57, and when combined imply Omega_{Lambda} = 0.74 +/- 0.016, independent of
the Universe’s evolution at z<0.57. In our companion paper (Samushia et al.
prep), we explore further cosmological implications of these observations. | | Source: | arXiv, 1203.6641 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER