SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA
We study the role of cold gas in quenching star formation in the green valley by analyzing ALMA 12CO (1–0) observations of three galaxies with resolved optical spectroscopy from the MaNGA survey. We present resolution-matched maps of the star formation rate and molecular gas mass. These data are use...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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American Astronomical Society
2017
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| Online Access: | https://eprints.nottingham.ac.uk/48954/ |
| _version_ | 1848797887828328448 |
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| author | Lin, Lihwai Belfiore, Francesco Pan, Hsi-An Bothwell, M. S. Hsieh, Pei-Ying Huang, Shan Xiao, Ting Sánchez, Sebastián F. Hsieh, Bau-Ching Masters, Karen Ramya, S. Lin, Jing-Hua Hsu, Chin-Hao Li, Cheng Maiolino, Roberto Bundy, Kevin Bizyaev, Dmitry Drory, Niv Ibarra-Medel, Héctor Lacerna, Ivan Haines, Tim Smethurst, Rebecca Stark, David V. Thomas, Daniel |
| author_facet | Lin, Lihwai Belfiore, Francesco Pan, Hsi-An Bothwell, M. S. Hsieh, Pei-Ying Huang, Shan Xiao, Ting Sánchez, Sebastián F. Hsieh, Bau-Ching Masters, Karen Ramya, S. Lin, Jing-Hua Hsu, Chin-Hao Li, Cheng Maiolino, Roberto Bundy, Kevin Bizyaev, Dmitry Drory, Niv Ibarra-Medel, Héctor Lacerna, Ivan Haines, Tim Smethurst, Rebecca Stark, David V. Thomas, Daniel |
| author_sort | Lin, Lihwai |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We study the role of cold gas in quenching star formation in the green valley by analyzing ALMA 12CO (1–0) observations of three galaxies with resolved optical spectroscopy from the MaNGA survey. We present resolution-matched maps of the star formation rate and molecular gas mass. These data are used to calculate the star formation efficiency (SFE) and gas fraction ( fgas) for these galaxies separately in the central “bulge” regions and outer disks. We find that, for the two galaxies whose global specific star formation rate (sSFR) deviates most from the star formation main sequence, the gas fraction in the bulges is significantly lower than that in their disks, supporting an “inside-out” model of galaxy quenching. For the two galaxies where SFE can be reliably determined in the central regions, the bulges and disks share similar SFEs. This suggests that a decline in fgas is the main driver of lowered sSFR in bulges compared to disks in green valley galaxies. Within the disks, there exist common correlations between the sSFR and SFE and between sSFR and fgas on kiloparsec scales—the local SFE or fgas in the disks declines with local sSFR. Our results support a picture in which the sSFR in bulges is primarily controlled by fgas, whereas both SFE and fgas play a role in lowering the sSFR in disks. A larger sample is required to confirm if the trend established in this work is representative of the green valley as a whole. |
| first_indexed | 2025-11-14T20:11:01Z |
| format | Article |
| id | nottingham-48954 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:11:01Z |
| publishDate | 2017 |
| publisher | American Astronomical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-489542020-05-04T19:21:57Z https://eprints.nottingham.ac.uk/48954/ SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA Lin, Lihwai Belfiore, Francesco Pan, Hsi-An Bothwell, M. S. Hsieh, Pei-Ying Huang, Shan Xiao, Ting Sánchez, Sebastián F. Hsieh, Bau-Ching Masters, Karen Ramya, S. Lin, Jing-Hua Hsu, Chin-Hao Li, Cheng Maiolino, Roberto Bundy, Kevin Bizyaev, Dmitry Drory, Niv Ibarra-Medel, Héctor Lacerna, Ivan Haines, Tim Smethurst, Rebecca Stark, David V. Thomas, Daniel We study the role of cold gas in quenching star formation in the green valley by analyzing ALMA 12CO (1–0) observations of three galaxies with resolved optical spectroscopy from the MaNGA survey. We present resolution-matched maps of the star formation rate and molecular gas mass. These data are used to calculate the star formation efficiency (SFE) and gas fraction ( fgas) for these galaxies separately in the central “bulge” regions and outer disks. We find that, for the two galaxies whose global specific star formation rate (sSFR) deviates most from the star formation main sequence, the gas fraction in the bulges is significantly lower than that in their disks, supporting an “inside-out” model of galaxy quenching. For the two galaxies where SFE can be reliably determined in the central regions, the bulges and disks share similar SFEs. This suggests that a decline in fgas is the main driver of lowered sSFR in bulges compared to disks in green valley galaxies. Within the disks, there exist common correlations between the sSFR and SFE and between sSFR and fgas on kiloparsec scales—the local SFE or fgas in the disks declines with local sSFR. Our results support a picture in which the sSFR in bulges is primarily controlled by fgas, whereas both SFE and fgas play a role in lowering the sSFR in disks. A larger sample is required to confirm if the trend established in this work is representative of the green valley as a whole. American Astronomical Society 2017-12-10 Article PeerReviewed Lin, Lihwai, Belfiore, Francesco, Pan, Hsi-An, Bothwell, M. S., Hsieh, Pei-Ying, Huang, Shan, Xiao, Ting, Sánchez, Sebastián F., Hsieh, Bau-Ching, Masters, Karen, Ramya, S., Lin, Jing-Hua, Hsu, Chin-Hao, Li, Cheng, Maiolino, Roberto, Bundy, Kevin, Bizyaev, Dmitry, Drory, Niv, Ibarra-Medel, Héctor, Lacerna, Ivan, Haines, Tim, Smethurst, Rebecca, Stark, David V. and Thomas, Daniel (2017) SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA. Astrophysical Journal, 851 (1). p. 18. ISSN 1538-4357 http://iopscience.iop.org/article/10.3847/1538-4357/aa96ae doi:10.3847/1538-4357/aa96ae doi:10.3847/1538-4357/aa96ae |
| spellingShingle | Lin, Lihwai Belfiore, Francesco Pan, Hsi-An Bothwell, M. S. Hsieh, Pei-Ying Huang, Shan Xiao, Ting Sánchez, Sebastián F. Hsieh, Bau-Ching Masters, Karen Ramya, S. Lin, Jing-Hua Hsu, Chin-Hao Li, Cheng Maiolino, Roberto Bundy, Kevin Bizyaev, Dmitry Drory, Niv Ibarra-Medel, Héctor Lacerna, Ivan Haines, Tim Smethurst, Rebecca Stark, David V. Thomas, Daniel SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA |
| title | SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA |
| title_full | SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA |
| title_fullStr | SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA |
| title_full_unstemmed | SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA |
| title_short | SDSS-IV MaNGA-resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA |
| title_sort | sdss-iv manga-resolved star formation and molecular gas properties of green valley galaxies: a first look with alma and manga |
| url | https://eprints.nottingham.ac.uk/48954/ https://eprints.nottingham.ac.uk/48954/ https://eprints.nottingham.ac.uk/48954/ |