SDSS-IV MaNGA: the different quenching histories of fast and slow rotators
Do the theorised different formation mechanisms of fast and slow rotators produce an observable difference in their star formation histories? To study this we identify quenching slow rotators in the MaNGA sample by selecting those which lie below the star forming sequence and identify a sample of qu...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
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Oxford University Press
2018
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| Online Access: | https://eprints.nottingham.ac.uk/47084/ |
| _version_ | 1848797463734910976 |
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| author | Smethurst, Rebecca J. Masters, Karen L. Lintott, Chris J. Weijmans, Anne-Marie Merrifield, Michael R. Penny, Samantha J. Aragón-Salamanca, Alfonso Brownstein, J. Bundy, Kevin Drory, Niv Law, D.R. Nichol, Robert C. |
| author_facet | Smethurst, Rebecca J. Masters, Karen L. Lintott, Chris J. Weijmans, Anne-Marie Merrifield, Michael R. Penny, Samantha J. Aragón-Salamanca, Alfonso Brownstein, J. Bundy, Kevin Drory, Niv Law, D.R. Nichol, Robert C. |
| author_sort | Smethurst, Rebecca J. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Do the theorised different formation mechanisms of fast and slow rotators produce an observable difference in their star formation histories? To study this we identify quenching slow rotators in the MaNGA sample by selecting those which lie below the star forming sequence and identify a sample of quenching fast rotators which were matched in stellar mass. This results in a total sample of 194 kinematically classified galaxies, which is agnostic to visual morphology. We use u − r and NUV − u colours from SDSS and GALEX and an existing inference package, STARPY, to conduct a first look at the onset time and exponentially declining rate of quenching of these galaxies. An Anderson-Darling test on the distribution of the inferred quenching rates across the two kinematic populations reveals they are statistically distinguishable (3.2σ). We find that fast rotators quench at a much wider range of rates than slow rotators, consistent with a wide variety of physical processes such as secular evolution, minor mergers, gas accretion and environmentally driven mechanisms. Quenching is more likely to occur at rapid rates (τ≲1 Gyr) for slow rotators, in agreement with theories suggesting slow rotators are formed in dynamically fast processes, such as major mergers. Interestingly, we also find that a subset of the fast rotators quench at these same rapid rates as the bulk of the slow rotator sample. We therefore discuss how the total gas mass of a merger, rather than the merger mass ratio, may decide a galaxy’s ultimate kinematic fate. |
| first_indexed | 2025-11-14T20:04:17Z |
| format | Article |
| id | nottingham-47084 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:04:17Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-470842020-05-04T19:26:24Z https://eprints.nottingham.ac.uk/47084/ SDSS-IV MaNGA: the different quenching histories of fast and slow rotators Smethurst, Rebecca J. Masters, Karen L. Lintott, Chris J. Weijmans, Anne-Marie Merrifield, Michael R. Penny, Samantha J. Aragón-Salamanca, Alfonso Brownstein, J. Bundy, Kevin Drory, Niv Law, D.R. Nichol, Robert C. Do the theorised different formation mechanisms of fast and slow rotators produce an observable difference in their star formation histories? To study this we identify quenching slow rotators in the MaNGA sample by selecting those which lie below the star forming sequence and identify a sample of quenching fast rotators which were matched in stellar mass. This results in a total sample of 194 kinematically classified galaxies, which is agnostic to visual morphology. We use u − r and NUV − u colours from SDSS and GALEX and an existing inference package, STARPY, to conduct a first look at the onset time and exponentially declining rate of quenching of these galaxies. An Anderson-Darling test on the distribution of the inferred quenching rates across the two kinematic populations reveals they are statistically distinguishable (3.2σ). We find that fast rotators quench at a much wider range of rates than slow rotators, consistent with a wide variety of physical processes such as secular evolution, minor mergers, gas accretion and environmentally driven mechanisms. Quenching is more likely to occur at rapid rates (τ≲1 Gyr) for slow rotators, in agreement with theories suggesting slow rotators are formed in dynamically fast processes, such as major mergers. Interestingly, we also find that a subset of the fast rotators quench at these same rapid rates as the bulk of the slow rotator sample. We therefore discuss how the total gas mass of a merger, rather than the merger mass ratio, may decide a galaxy’s ultimate kinematic fate. Oxford University Press 2018-01-11 Article PeerReviewed Smethurst, Rebecca J., Masters, Karen L., Lintott, Chris J., Weijmans, Anne-Marie, Merrifield, Michael R., Penny, Samantha J., Aragón-Salamanca, Alfonso, Brownstein, J., Bundy, Kevin, Drory, Niv, Law, D.R. and Nichol, Robert C. (2018) SDSS-IV MaNGA: the different quenching histories of fast and slow rotators. Monthly Notices of the Royal Astronomical Society, 473 (2). pp. 2679-2687. ISSN 1365-2966 galaxies-photometry galaxies-statistics galaxies-morphology https://academic.oup.com/mnras/article/doi/10.1093/mnras/stx2547/4315952/SDSSIV-MaNGA-The-Different-Quenching-Histories-of doi:10.1093/mnras/stx2547 doi:10.1093/mnras/stx2547 |
| spellingShingle | galaxies-photometry galaxies-statistics galaxies-morphology Smethurst, Rebecca J. Masters, Karen L. Lintott, Chris J. Weijmans, Anne-Marie Merrifield, Michael R. Penny, Samantha J. Aragón-Salamanca, Alfonso Brownstein, J. Bundy, Kevin Drory, Niv Law, D.R. Nichol, Robert C. SDSS-IV MaNGA: the different quenching histories of fast and slow rotators |
| title | SDSS-IV MaNGA: the different quenching histories of fast and slow rotators |
| title_full | SDSS-IV MaNGA: the different quenching histories of fast and slow rotators |
| title_fullStr | SDSS-IV MaNGA: the different quenching histories of fast and slow rotators |
| title_full_unstemmed | SDSS-IV MaNGA: the different quenching histories of fast and slow rotators |
| title_short | SDSS-IV MaNGA: the different quenching histories of fast and slow rotators |
| title_sort | sdss-iv manga: the different quenching histories of fast and slow rotators |
| topic | galaxies-photometry galaxies-statistics galaxies-morphology |
| url | https://eprints.nottingham.ac.uk/47084/ https://eprints.nottingham.ac.uk/47084/ https://eprints.nottingham.ac.uk/47084/ |