期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 405, 期 2, 页码 1025-1039出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2010.16486.x
关键词
gravitational lensing: weak; dust; extinction; dark matter
资金
- Monell Foundation
- Friends of the Institute for Advanced Study
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- Grants-in-Aid for Scientific Research [20540255] Funding Source: KAKEN
We present a simultaneous detection of gravitational magnification and dust reddening effects due to galactic haloes and large-scale structure. The measurement is based on correlating the brightness of similar to 85 000 quasars at z > 1 with the position of 24 million galaxies at z similar to 0.3 derived from the Sloan Digital Sky Survey and is used to constrain the galaxy-mass and galaxy-dust correlation functions up to cosmological scales. The presence of dust is detected from 20 kpc to several Mpc, and we find its projected density to follow: Sigma(dust) similar to r-0.8(p), a distribution similar to mass. On large scales, its wavelength dependence is described by R(V) similar or equal to 4.9 +/- 3.2, consistent with interstellar dust. This, in turn, implies a cosmic dust density of (dust) similar or equal to 5 x 10-6, roughly half of which comes from dust in haloes of similar to L star galaxies. We estimate the resulting opacity of the Universe for various evolutionary models and find << A(V) >> similar to 0.03 mag up to z = 0.5. We present magnification measurements, corrected for dust extinction, from which the galaxy-mass correlation function is inferred to give the mean surface mass density profile around galaxies Sigma similar to 30(theta /1 arcmin)-0.8 h M(circle dot) pc-2 up to a radius of 10 Mpc, in agreement with gravitational shear estimates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据