Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 509, Issue 1, Pages 1237-1244Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stab3013
Keywords
galaxies: ISM; galaxies: kinematics and dynamics; galaxies: star formation
Categories
Funding
- National Key Research and Development Program of China [2017YFA0402703]
- National Natural Science Foundation of China [11733002]
- Alfred P. Sloan Foundation
- US Department of Energy Office of Science
- Center for HighPerformance Computing at the University of Utah
- Carnegie Institution for Science
- Carnegie Mellon University
- Chilean Participation Group
- French Participation Group
- Harvard-Smithsonian Center for Astrophysics
- Instituto de Astrofisica de Canarias
- Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Lawrence Berkeley National Laboratory
- Leibniz Institutfur 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 Observatory of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatorio 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
- Brazilian Participation Group
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Investigating star-forming activities in early-type galaxies, we discovered the presence of pseudo-bulges in SFS0s and potentially different dynamical processes in different environments. The analysis of N/O and O/H abundance ratios revealed nitrogen enrichment in field SFS0s. Additionally, using MaNGA data confirmed the self-regulation of star-formation activity on kpc scales.
To investigate star-forming activities in early-type galaxies, we select a sample of 52 star-forming S0 galaxies (SFS0s) from the SDSS-IV MaNGA survey. We find that SFS0s have smaller stellar masses compared to normal S0s in MaNGA. After matching the stellar mass to select the control sample, we find that the mean Sdrsic index of SFS0 bulges (1.76 +/- 0.21) is significantly smaller than that of the control sample (2.57 +/- 0.20), suggesting the existence of pseudo-bulges in SFS0s. After introducing the environmental information, SFS0s show smaller spin parameters in the field than in groups, while the control sample has no obvious difference in different environments, which may suggest different dynamical processes in SFS0s. Furthermore, with derived N/O and O/H abundance ratios, SFS0s in the field show nitrogen enrichment, providing evidence for the accretion of metal-poor gas in the field environment. To study the star-formation relation, we show that the slope of the spatially resolved star-formation main sequence is nearly 1.0 with MaNGA integral field unit data, confirming the self-regulation of star-formation activity on kpc scales.
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