A MAP OF THE INTEGRATED SACHS-WOLFE SIGNAL FROM LUMINOUS RED GALAXIES

被引：54
作者：
Granett, Benjamin R. [1 ]
Neyrinck, Mark C. [1 ,2 ]
Szapudi, Istvan [1 ,3 ,4 ]
机构：
[1] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[3] Collegium Budapest, Inst Adv Study, H-1014 Budapest, Hungary
[4] Eotvos Lorand Univ, Dept Atom Phys, H-1117 Budapest, Hungary
来源：
ASTROPHYSICAL JOURNAL | 2009年 / 701卷 / 01期
关键词：
cosmic microwave background; cosmology: observations; large-scale structure of universe; methods: statistical; DIGITAL SKY SURVEY; ANISOTROPY-PROBE OBSERVATIONS; CROSS-CORRELATION; DARK ENERGY; COSMOLOGICAL CONSTANT; LOCAL UNIVERSE; RADIO-SOURCES; WMAP; EVOLUTION; EMISSION;
D O I：
10.1088/0004-637X/701/1/414
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We construct a map of the time derivative of the gravitational potential traced by Sloan Digital Sky Survey luminous red galaxies (LRGs). The potential decays on large scales due to cosmic acceleration, leaving an imprint on cosmic microwave background (CMB) radiation through the integrated Sachs-Wolfe (ISW) effect. With a template fit, we directly measure this signature on the CMB at a 2 sigma confidence level. The measurement is consistent with the cross-correlation statistic, strengthening the claim that dark energy is indeed the cause of the correlation. This new approach potentially simplifies the cosmological interpretation. Our constructed linear ISW map shows no evidence for degree-scale cold and hot spots associated with supervoid and supercluster structures. This suggests that the linear ISW effect in a concordance Lambda CDM cosmology is insufficient to explain the strong CMB imprints from these structures that we previously reported.
引用
收藏
页码：414 / 422
页数：9
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