期刊
ASTROPHYSICAL JOURNAL
卷 930, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac651a
关键词
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资金
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Center for High Performance Computing at the University of Utah
- Brazilian Participation Group
- Carnegie Institution for Science
- Carnegie Mellon University
- Center for Astrophysics \ Harvard Smithsonian
- Chilean Participation Group
- French Participation Group
- Instituto de Astrofisica de Canarias
- Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Korean Participation Group
- Lawrence Berkeley National Laboratory
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
- Max-Planck-Institut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- National Astronomical Observatories of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatario Nacional/MCTI
- Ohio State University
- Pennsylvania State University
- Shanghai Astronomical Observatory
- United Kingdom Participation Group
- Universidad Nacional Autonoma de Mexico
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Utah
- University of Virginia
- University of Washington
- University of Wisconsin
- Vanderbilt University
- Yale University.
We present the relationship between local stellar mass surface density (sigma(*)) and N/O derived from SDSS-IV MaNGA data for the first time. We find that sigma(*) alone is insufficient to predict the N/O in MaNGA spaxels and there is an additional dependence on the local star formation rate surface density (sigma(SFR)). Furthermore, we show that the local N/O scaling relations also depend on the total galaxy stellar mass and galaxy size.
We present, for the first time, the relationship between local stellar mass surface density, sigma(*), and N/O derived from SDSS-IV MaNGA data, using a sample of 792,765 high signal-to-noise ratio star-forming spaxels. Using a combination of phenomenological modeling and partial correlation analysis, we find that sigma(*) alone is insufficient to predict the N/O in MaNGA spaxels and that there is an additional dependence on the local star formation rate surface density, sigma(SFR). This effect is a factor of 3 stronger than the dependence of 12+log(O/H) on sigma(SFR). Surprisingly, we find that the local N/O scaling relations also depend on the total galaxy stellar mass at fixed sigma(*) and the galaxy size at fixed stellar mass. We find that more compact galaxies are more nitrogen rich, even when sigma(*) and sigma(SFR) are controlled for. We show that similar to 50% of the variance of N/O is explained by the total stellar mass and size. Thus, the evolution of nitrogen in galaxies is set by more than just local effects and does not simply track the buildup of oxygen in galaxies. The precise form of the N/O-O/H relation is therefore sensitive to the sample of galaxies from which it is derived. This result casts doubt on the universal applicability of nitrogen-based strong-line metallicity indicators derived in the local universe.
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