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SDSS-IV MaNGA:the different quenching histories of fast and slow rotators
SDSS-IV MaNGA:the different quenching histories of fast and slow rotators
- Source :
- Smethurst, R, Masters, K, Lintott, C, Weijmans, A-M, Merrifield, M, Penny, S, Salamanca, A A, Brownstein, J, Bundy, K, Drory, N, Law, D & Nichol, R 2018, ' SDSS-IV MaNGA : the different quenching histories of fast and slow rotators ', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 2, pp. 2679-2687 . https://doi.org/10.1093/mnras/stx2547, NASA Astrophysics Data System
- Publication Year :
- 2018
-
Abstract
- 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 ($3.2\sigma$). 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 ($\tau \lesssim 1~\rm{Gyr}$) 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.<br />Comment: 10 pages. 5 figures. Accepted 2017 September 25. Received 2017 September 25; in original form 2017 August 25
- Subjects :
- Stellar mass
astro-ph.GA
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
photometry [Galaxy]
statistics [Galaxies]
0103 physical sciences
QB Astronomy
010303 astronomy & astrophysics
QC
Astrophysics::Galaxy Astrophysics
QB
Physics
Quenching
Accretion (meteorology)
010308 nuclear & particles physics
Star formation
Astronomy
Secular evolution
Astronomy and Astrophysics
Observable
general [Galaxies]
DAS
Mass ratio
Astrophysics - Astrophysics of Galaxies
Galaxy
QC Physics
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Smethurst, R, Masters, K, Lintott, C, Weijmans, A-M, Merrifield, M, Penny, S, Salamanca, A A, Brownstein, J, Bundy, K, Drory, N, Law, D & Nichol, R 2018, ' SDSS-IV MaNGA : the different quenching histories of fast and slow rotators ', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 2, pp. 2679-2687 . https://doi.org/10.1093/mnras/stx2547, NASA Astrophysics Data System
- Accession number :
- edsair.doi.dedup.....a6e50166675ef842070e59bfd597ee26
- Full Text :
- https://doi.org/10.1093/mnras/stx2547