期刊
ASTROPHYSICAL JOURNAL
卷 884, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ab43ca
关键词
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资金
- NSF CAREER [AST-1554877]
- NSF [1616547]
- ERC [695671]
- Science and Technology Facilities Council (STFC)
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Center for High-Performance Computing at the University of Utah
- Carnegie Institution for Science
- Chilean Participation Group
- French Participation Group
- Harvard-Smithsonian Center for Astrophysics
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Korean Participation Group
- Lawrence Berkeley National Laboratory
- Max-Planck-Institut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- Shanghai Astronomical Observatory
- Universidad Nacional Autonoma de Mexico
- University of Portsmouth
- University of Virginia
- Yale University
- Brazilian Participation Group
- Carnegie Mellon University
- Instituto de Astrofisica de Canarias
- Johns Hopkins University
- Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
- National Astronomical Observatories of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatorio Nacional/MCTI
- Ohio State University
- Pennsylvania State University
- United Kingdom Participation Group
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Utah
- University of Washington
- University of Wisconsin
- Vanderbilt Universit
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- STFC [ST/M001172/1] Funding Source: UKRI
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1616547] Funding Source: National Science Foundation
We investigate the environmental dependence of the local gas-phase metallicity in a sample of star-forming galaxies from the MaNGA survey. Satellite galaxies with stellar masses in the range 9 < log(M-*/M-circle dot) < 10 are found to be similar to 0.05 dex higher in metallicity than centrals of similar stellar mass. Within the low-mass satellite population, we find that the interstellar medium (ISM) metallicity depends most strongly on the stellar mass of the galaxy that is central to the halo, though there is no obvious difference in the metallicity gradients. At fixed total stellar mass, the satellites of high-mass (M-* > 10(10.5)M(circle dot)) centrals are similar to 0.1 dex more metal-rich than the satellites of low-mass (M-* < 10(10)M(circle dot)) centrals, controlling for local stellar mass surface density and gas fraction. Fitting a gas regulator model to the spaxel data, we are able to account for variations in the local gas fraction, stellar mass surface density, and local escape velocity-dependent outflows. We find that the best explanation for the metallicity differences is the variation in the average metallicity of accreted gas between different environments that depends on the stellar mass of the dominant galaxies in each halo. This is interpreted as evidence for the exchange of enriched gas between galaxies in dense environments that is predicted by recent simulations.
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