The growth of the central region by acquisition of counterrotating gas in star-forming galaxies
Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-form...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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Nature Publishing Group
2016
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| Online Access: | https://eprints.nottingham.ac.uk/37778/ |
| _version_ | 1848795532132089856 |
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| author | Chen, Yan-Mei Shi, Yong Tremonti, Christy A. Bershady, Matt Merrifield, Michael Emsellem, Eric Jin, Yi-Fei Huang, Song Fu, Hai Wake, David A. Bundy, Kevin Stark, David Lin, Lihwai Argudo-Fernandez, Maria Bergmann, Thaisa Storchi Bizyaev, Dmitry Brownstein, Joel Bureau, Martin Chisholm, John Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, Kai-Ke Riffel, Rogemar A. Thomas, Daniel Wang, Lan Westfall, Kyle Yan, Ren-Bin |
| author_facet | Chen, Yan-Mei Shi, Yong Tremonti, Christy A. Bershady, Matt Merrifield, Michael Emsellem, Eric Jin, Yi-Fei Huang, Song Fu, Hai Wake, David A. Bundy, Kevin Stark, David Lin, Lihwai Argudo-Fernandez, Maria Bergmann, Thaisa Storchi Bizyaev, Dmitry Brownstein, Joel Bureau, Martin Chisholm, John Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, Kai-Ke Riffel, Rogemar A. Thomas, Daniel Wang, Lan Westfall, Kyle Yan, Ren-Bin |
| author_sort | Chen, Yan-Mei |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counter-rotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counter-rotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (<1 kpc) to form new stars. |
| first_indexed | 2025-11-14T19:33:35Z |
| format | Article |
| id | nottingham-37778 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:33:35Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-377782024-08-15T15:20:34Z https://eprints.nottingham.ac.uk/37778/ The growth of the central region by acquisition of counterrotating gas in star-forming galaxies Chen, Yan-Mei Shi, Yong Tremonti, Christy A. Bershady, Matt Merrifield, Michael Emsellem, Eric Jin, Yi-Fei Huang, Song Fu, Hai Wake, David A. Bundy, Kevin Stark, David Lin, Lihwai Argudo-Fernandez, Maria Bergmann, Thaisa Storchi Bizyaev, Dmitry Brownstein, Joel Bureau, Martin Chisholm, John Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, Kai-Ke Riffel, Rogemar A. Thomas, Daniel Wang, Lan Westfall, Kyle Yan, Ren-Bin Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counter-rotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counter-rotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (<1 kpc) to form new stars. Nature Publishing Group 2016-10-19 Article PeerReviewed Chen, Yan-Mei, Shi, Yong, Tremonti, Christy A., Bershady, Matt, Merrifield, Michael, Emsellem, Eric, Jin, Yi-Fei, Huang, Song, Fu, Hai, Wake, David A., Bundy, Kevin, Stark, David, Lin, Lihwai, Argudo-Fernandez, Maria, Bergmann, Thaisa Storchi, Bizyaev, Dmitry, Brownstein, Joel, Bureau, Martin, Chisholm, John, Drory, Niv, Guo, Qi, Hao, Lei, Hu, Jian, Li, Cheng, Li, Ran, Lopes, Alexandre Roman, Pan, Kai-Ke, Riffel, Rogemar A., Thomas, Daniel, Wang, Lan, Westfall, Kyle and Yan, Ren-Bin (2016) The growth of the central region by acquisition of counterrotating gas in star-forming galaxies. Nature Communications, 7 . 13269/1-13269/9. ISSN 2041-1723 http://www.nature.com/articles/ncomms13269 doi:10.1038/ncomms13269 doi:10.1038/ncomms13269 |
| spellingShingle | Chen, Yan-Mei Shi, Yong Tremonti, Christy A. Bershady, Matt Merrifield, Michael Emsellem, Eric Jin, Yi-Fei Huang, Song Fu, Hai Wake, David A. Bundy, Kevin Stark, David Lin, Lihwai Argudo-Fernandez, Maria Bergmann, Thaisa Storchi Bizyaev, Dmitry Brownstein, Joel Bureau, Martin Chisholm, John Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, Kai-Ke Riffel, Rogemar A. Thomas, Daniel Wang, Lan Westfall, Kyle Yan, Ren-Bin The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| title | The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| title_full | The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| title_fullStr | The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| title_full_unstemmed | The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| title_short | The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| title_sort | growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
| url | https://eprints.nottingham.ac.uk/37778/ https://eprints.nottingham.ac.uk/37778/ https://eprints.nottingham.ac.uk/37778/ |