Journal article
Measuring the galaxy-mass and galaxy-dust correlations through magnification and reddening
Monthly notices of the Royal Astronomical Society, v 405(2), pp 1025-1039
Sep 2011
Abstract
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 ∼85 000 quasars at z > 1 with the position of 24 million galaxies at z∼ 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: Σdust∼r
−0.8
p, a distribution similar to mass. On large scales, its wavelength dependence is described by RV
≃ 4.9 ± 3.2, consistent with interstellar dust. This, in turn, implies a cosmic dust density of Ωdust≃ 5 × 10−6, roughly half of which comes from dust in haloes of ∼L
★ galaxies. We estimate the resulting opacity of the Universe for various evolutionary models and find 〈AV
〉∼ 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 Σ∼ 30(θ/1 arcmin)−0.8
h M⊙ pc−2 up to a radius of 10 Mpc, in agreement with gravitational shear estimates.
Metrics
Details
- Title
- Measuring the galaxy-mass and galaxy-dust correlations through magnification and reddening
- Creators
- Brice Ménard - 1Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 3H8, CanadaRyan Scranton - 2Physics Department, University of California, Davis, CA 95616, USAMasataka Fukugita - 3Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa 2778582, JapanGordon Richards - 6Drexel University, Department of Physics, 3141 Chestnut Street, Philadelphia, PA 19104, USA
- Publication Details
- Monthly notices of the Royal Astronomical Society, v 405(2), pp 1025-1039
- Publisher
- Blackwell Publishing Ltd; Oxford, UK
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000278677800022
- Scopus ID
- 2-s2.0-77955238378
- Other Identifier
- 991014878534104721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics