Affiliation:
1. Department of Astronomy and Astrophysics, University of California Santa Cruz , 1156 High Street, Santa Cruz, CA 95064, USA
2. Department of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USA
3. Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA
4. Department of Astronomy, Yale University , New Haven, CT 06511, USA
5. David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto , 50 St George Street, Toronto, ON M5S 3H4, Canada
Abstract
ABSTRACT
The outer light (stellar haloes) of massive galaxies has recently emerged as a possible low scatter tracer of dark matter halo mass. To test the robustness of outer light measurements across different data sets, we compare the 1D azimuthally averaged surface brightness profiles of massive galaxies using four independent data sets: the Hyper Suprime-Cam survey (HSC), the Dark Energy Camera Legacy Survey (DECaLS), the Sloan Digital Sky Survey (SDSS), and the Dragonfly Wide Field Survey (Dragonfly). We test the sky subtraction and proposed corrections for HSC and DECaLS. For galaxies at z < 0.05, Dragonfly has the best control of systematics, reaching surface brightness levels of μr ≈ 30 mag arcsec−2. At 0.19 < z < 0.50, HSC can reliably recover individual surface brightness profiles to μr ≈ 28.5 mag arcsec−2 (R = 100–150 kpc in semimajor axis). In a statistical sense, DECaLS agrees with HSC to R > 200 kpc. DECaLS and HSC measurements of the stellar mass contained within 100 kpc agree within 0.05 dex. Finally, we use weak lensing to show that measurements of outer light with DECaLS at 0.19 < z < 0.50 show a similar promise as HSC as a low scatter proxy of halo mass. The tests and results from this paper represent an important step forward for accurate measurements of the outer light of massive galaxies and demonstrate that outer light measurements from DECam imaging will be a promising method for finding galaxy clusters.
Funder
China Scholarship Council
University of California, Santa Cruz
U.S. Department of Energy
Office of Science
High Energy Physics
National Science Foundation
David and Lucile Packard Foundation
Alfred P. Sloan Foundation
National Aeronautics and Space Administration
Space Telescope Science Institute
HSC
Princeton University
National Astronomical Observatory of Japan
University of Tokyo
High Energy Accelerator Research Organization
FIRST
Ministry of Education, Culture, Sports, Science and Technology
Japan Society for the Promotion of Science London
Japan Science and Technology Agency
University of Arizona
Science and Technology Facilities Council
Higher Education Funding Council for England
National Center for Supercomputing Applications
University of Illinois at Urbana-Champaign
University of Chicago
Ohio State University
Texas A&M University
Financiadora de Estudos e Projetos
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
Deutsche Forschungsgemeinschaft
Argonne National Laboratory
University of Cambridge
University College London
University of Edinburgh
Eidgenössische Technische Hochschule Zürich
CSIC
Lawrence Berkeley National Laboratory
University of Michigan
University of Nottingham
University of Pennsylvania
University of Portsmouth
SLAC National Accelerator Laboratory
Stanford University
University of Sussex
Chinese Academy of Sciences
Ministry of Finance
Chinese National Natural Science Foundation
Jet Propulsion Laboratory
California Institute of Technology
Division of Astronomical Sciences
Max Planck Society
American Museum of Natural History
University of Basel
Case Western Reserve University
Drexel University
Institute for Advanced Study
Johns Hopkins University
Los Alamos National Laboratory
New Mexico State University
University of Pittsburgh
U.S. Naval Observatory
University of Washington
Publisher
Oxford University Press (OUP)
Subject
Space and Planetary Science,Astronomy and Astrophysics