Journal article
SDSS-IV MaNGA: The Roles of AGNs and Dynamical Processes in Star Formation Quenching in Nearby Disk Galaxies
The Astrophysical journal, Vol.870(1), p.19
12/28/2018
DOI: 10.3847/1538-4357/aaee88
Abstract
We study how star formation (SF) is quenched in low-redshift disk galaxies with integral-field spectroscopy. We select 131 face-on spiral galaxies with stellar mass greater than 3 × 1010 M , and with spatially resolved spectrum from MaNGA DR13. We subdivide the sample into four groups based on the offset of their global specific star formation rate (SFR) from the star-forming main sequence and stack the radial profiles of stellar mass and SFR. By comparing the stacked profiles of quiescent and star-forming disk galaxies, we find that the decrease of the global SFR is caused by the suppression of SF at all radii, but with a more significant drop from the center to the outer regions following an inside-out pattern. As the global specific SFR decreases, the central stellar mass, the fraction of disk galaxies hosting stellar bars, and active galactic nuclei (AGNs; including both LINERs and Seyferts) all increase, indicating dynamical processes and AGN feedback are possible contributors to the inside-out quenching of SF in the local universe. However, if we include only Seyferts, or AGNs with EW(H ) > 3 , the increasing trend of AGN fraction with decreasing global sSFR disappears. Therefore, if AGN feedback is contributing to quenching, we suspect that it operates in the low-luminosity AGN mode, as indicated by the increasing large bulge mass of the more passive disk galaxies.
Details
- Title: Subtitle
- SDSS-IV MaNGA: The Roles of AGNs and Dynamical Processes in Star Formation Quenching in Nearby Disk Galaxies
- Creators
- Kexin Guo - Peking UniversityYingjie Peng - Peking UniversityLi Shao - Peking UniversityHai Fu - University of IowaBarbara Catinella - The University of Western AustraliaLuca Cortese - The University of Western AustraliaFeng Yuan - Chinese Academy of SciencesRenbin Yan - University of KentuckyChengpeng Zhang - Peking UniversityJing Dou - Peking University
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.870(1), p.19
- DOI
- 10.3847/1538-4357/aaee88
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Institute of Physics (IOP)
- Number of pages
- 11
- Language
- English
- Date published
- 12/28/2018
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200038602771
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