The Gravitational Shear--Intrinsic Ellipticity Correlation Functions of Luminous Red Galaxies in Observation and in the $Λ$CDM Model

Details The Gravitational Shear--Intrinsic Ellipticity Correlation Functions of Luminous Red Galaxies in Observation and in the $Λ$CDM Model The Gravitational Shear--Intrinsic Ellipticity Correlation Functions of Luminous Red Galaxies in Observation and in the $Λ$CDM Model

2008-12-15

arxiv.org/abs/0812.2935v2

Astrophysical Journal Letters 694 (2009) L83-L86

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, minor changes made with respect to published version

Scientific paper

10.1088/0004-637X/694/1/L83

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 $\sigma_\theta=34.9^{+1.9}_{-2.1}$ 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.

Affiliated with

Also associated with

No associations

Rating

The Gravitational Shear--Intrinsic Ellipticity Correlation Functions of Luminous Red Galaxies in Observation and in the $Λ$CDM Model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Gravitational Shear--Intrinsic Ellipticity Correlation Functions of Luminous Red Galaxies in Observation and in the $Λ$CDM Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Gravitational Shear--Intrinsic Ellipticity Correlation Functions of Luminous Red Galaxies in Observation and in the $Λ$CDM Model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-226384