The SDSS Coadd: Cosmic Shear Measurement
Cosmology and Nongalactic Astrophysics
2015-06-03 v2
Abstract
Stripe 82 in the Sloan Digital Sky Survey was observed multiple times, allowing deeper images to be constructed by coadding the data. Here we analyze the ellipticities of background galaxies in this 275 square degree region, searching for evidence of distortions due to cosmic shear. The E-mode is detected in both real and Fourier space with - significance on degree scales, while the B-mode is consistent with zero as expected. The amplitude of the signal constrains the combination of the matter density and fluctuation amplitude to be .
Keywords
Cite
@article{arxiv.1111.6622,
title = {The SDSS Coadd: Cosmic Shear Measurement},
author = {Huan Lin and Scott Dodelson and Hee-Jong Seo and Marcelle Soares-Santos and James Annis and Jiangang Hao and David Johnston and Jeffrey M. Kubo and Ribamar R. R. Reis and Melanie Simet},
journal= {arXiv preprint arXiv:1111.6622},
year = {2015}
}
Comments
17 pages, 19 figures, submitted to ApJ. Analysis updated using revised photo-z catalog of Reis et al. arXiv:1111.6620v2. Changes in results are within the errors and the conclusions are unaffected