Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 694, Issue 1, Pages L83-L86Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/694/1/L83
Keywords
cosmology: observations; galaxies: formation; galaxies: halos; gravitational lensing; large-scale structure of universe; methods: statistical
Categories
Funding
- NSFC [10533030, 10821302, 10878001]
- CAS [KJCX2-YW-T05, 2007CB815402]
- Alfred P. Sloan Foundation
- Participating Institutions
- National Science Foundation
- Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
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We examine whether the gravitational shear-intrinsic ellipticity (GI) correlation function of the luminous red galaxies (LRGs) can be modeled with the distribution function of a misalignment angle advocated recently by Okumura et al. For this purpose, we have accurately measured the GI correlation for the LRGs in the Data Release 6 (DR6) of the Sloan Digital Sky Survey (SDSS), which confirms the results of Hirata et al. who used the DR4 data. By comparing the GI correlation functions in the simulation and in the observation, we find that the GI correlation can be modeled in the current Lambda CDM model if the misalignment follows a Gaussian distribution with a zero mean and a typical misalignment angle sigma(theta) = 34.9(-2.1)(+1.9) degrees. We also find a correlation between the axis ratios and intrinsic alignments of LRGs. This effect should be taken into account in theoretical modeling of the GI and intrinsic ellipticity-ellipticity correlations for weak lensing surveys.
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