The SDSS Coadd: Cosmic Shear Measurement

Дата и время публикации : 2011-11-28T21:37:20Z

Авторы публикации и институты :
Huan Lin
Scott Dodelson
Hee-Jong Seo
Marcelle Soares-Santos
James Annis
Jiangang Hao
David Johnston
Jeffrey M. Kubo
Ribamar R. R. Reis
Melanie Simet

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 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
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: 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 $>5$-$sigma$ 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 $Omega_m$ and fluctuation amplitude $sigma_8$ to be $Omega_m^{0.7}sigma_8 = 0.252^{+0.032}_{-0.052}$.

Category: Physics