期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 505, 期 4, 页码 5370-5388出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stab1576
关键词
galaxies: clusters: general; galaxies: evolution; cosmology: observations
资金
- Samuel P. Langley PITT PACC
- NASA [HST-HF2-51441.001, NAS5-26555]
- U.S. Department of Energy Office of Science User Facility [DEAC02-05CH11231]
- Dark Energy Camera Legacy Survey [2014B-0404]
- U.S. Department of Energy
- U.S. National Science Foundation
- Ministry of Science and Education of Spain
- Science and Technology Facilities Council of the United Kingdom
- Higher Education Funding Council for England
- National Center for Supercomputing Applications at the University of Illinois at UrbanaChampaign
- Kavli Institute for Cosmological Physics at the University of Chicago
- Center for Cosmology and Astroparticle Physics, Ohio StateUniversity
- Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University
- Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo
- Financiadora de Estudos e Projetos
- Fundacao Carlos Chagas Filho de Amparo `a Pesquisa do Estado do Rio de Janeiro
- Conselho Nacional de Desenvolvimento Cientifico e Tecnol'ogico
- Ministerio da Ciencia, Tecnologia e Inovacao
- Deutsche Forschungsgemeinschaft
- Argonne National Laboratory
- University of California at Santa Cruz
- University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid
- University of Chicago
- University College London
- DES-Brazil Consortium
- University of Edinburgh
- Eidgenossische Technische Hochschule (ETH) Zurich
- Fermi National Accelerator Laboratory, the University of Illinois at Urbana Champaign
- Institut de Ciencies de l'Espai (IEEC/CSIC)
- Institut de Fisica d'Altes Energies, Lawrence Berkeley National Laboratory
- Ludwig-Maximilians Universitat Munchen
- associated Excellence Cluster Universe
- University of Michigan
- National Optical Astronomy Observatory
- University of Nottingham
- Ohio State University
- University of Pennsylvania
- University of Portsmouth
- SLAC National Accelerator Laboratory, Stanford University
- University of Sussex
- Texas AM University
- National Astronomical Observatories, Chinese Academy of Sciences [XDB09000000]
- Ministry of Finance
- External Cooperation Program of Chinese Academy of Sciences [114A11KYSB20160057]
- National Natural Science Foundation of China [11433005]
- National Aeronautics and Space Administration
- Office of Science, Office of High Energy Physics of the U.S. Department of Energy [DE-AC0205CH1123]
- National Energy Research Scientific Computing Center, a DOE Office of Science User Facility
- U.S. National Science Foundation, Division of Astronomical Sciences [AST-0950945]
- [2015A-0801]
The total luminosity in satellite galaxies can effectively probe dark matter haloes around central galaxies, as it scales linearly with host halo mass and is sensitive to halo formation time. Probes of galaxy large-scale environment can break the degeneracy, and lower mass galaxies show equivalent L-sat values. This method provides a high signal-to-noise ratio measurement for galaxies expected to occupy haloes at <10^12 M⊙.
We demonstrate how the total luminosity in satellite galaxies is a powerful probe of dark matter haloes around central galaxies. The method cross-correlates central galaxies in spectroscopic galaxy samples with fainter galaxies detected in photometric surveys. Using models, we show that the total galaxy luminosity, L-sat, scales linearly with host halo mass, making L-sat an excellent proxy for M-h. L-sat is also sensitive to the formation time of the halo. We demonstrate that probes of galaxy large-scale environment can break this degeneracy. Although this is an indirect probe of the halo, it yields a high signal-to-noise ratio measurement for galaxies expected to occupy haloes at <10(12) M-circle dot, where other methods suffer from larger errors. In this paper, we focus on observational and theoretical systematics in the L-sat method. We test the robustness of our method of finding central galaxies and our methods of estimating the number of background galaxies. We implement this method on galaxies in the Sloan Digital Sky Survey (SDSS) data, with satellites identified in fainter imaging data. We find excellent agreement between our theoretical predictions and the observational measurements. Finally, we compare our L-sat measurements to weak lensing estimates of M-h for red and blue subsamples. In the stellar mass range where the measurements overlap, we find consistent results, where red galaxies live in larger haloes. However, the L-sat approach allows us to probe significantly lower mass galaxies. At these masses, the L-sat values are equivalent. This example shows the potential of L-sat as a probe of dark haloes.
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