J/ApJ/937/117 MaNGA sample of galaxies (Fraser-McKelvie+, 2022)
Beyond Galaxy Bimodality: The Complex Interplay between Kinematic Morphology
and Star Formation in the Local Universe.
Fraser-McKelvie A., Cortese L.
<Astrophys. J., 937, 117 (2022)>
=2022ApJ...937..117F 2022ApJ...937..117F (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Morphology
Keywords: Galaxy evolution - Galaxy kinematics - Galaxy structure -
Galaxy quenching
Abstract:
It is generally assumed that galaxies are a bimodal population in both
star formation and structure; star-forming galaxies are disks, while
passive galaxies host large bulges or are entirely spheroidal. Here we
test this scenario by presenting a full census of the kinematic
morphologies of a volume-limited sample of galaxies in the local
universe extracted from the MaNGA galaxy survey. We measure the
integrated stellar line-of-sight velocity to velocity dispersion ratio
(V/sigma) for 4574 galaxies in the stellar mass range
9.75<logM*[M_☉]<11.75. We show that at fixed stellar mass, the
distribution of V/sigma is not bimodal, and that a simple separation
between fast and slow rotators is oversimplistic. Fast rotators are a
mixture of at least two populations, referred to here as dynamically
cold disks and intermediate systems, with disks dominating in both
total stellar mass and number. When considering star-forming and
passive galaxies separately, the star-forming population is almost
entirely made up of disks, while the passive population is mixed,
implying an array of quenching mechanisms. Passive disks represent
∼30% (both in number and mass) of passive galaxies, nearly a factor of
two higher than that of slow rotators, reiterating that these are an
important population for understanding galaxy quenching. These results
paint a picture of a local universe dominated by disky galaxies, most
of which become somewhat less rotation-supported upon or after
quenching. While spheroids are present to a degree, they are certainly
not the evolutionary end point for the majority of galaxies.
Description:
This catalogue is the main catalogue created for this work, including
the relevant MaNGA identifiers, derived kinematic parameters, and
matches to stellar mass and star formation rate estimates from the
GALEX-Sloan-WISE Legacy Survey (GSWLC; Salim et al.,
2016ApJS..227....2S 2016ApJS..227....2S, 2018ApJ...859...11S 2018ApJ...859...11S)
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
sample.dat 235 4742 Main catalogue created for this work
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See also:
https://salims.pages.iu.edu/gswlc : GALEX-SDSS-WISE Legacy Catalog Home Page
Byte-by-byte Description of file: sample.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- plateifu MaNGA plate-ifu identifier
(NNNNN-NNNNN) (plateifu)
13- 21 A9 --- MaNGA MaNGA ID (NN-NNNNNN) (mangaid)
23- 44 F22.18 deg RAdeg MaNGA right ascension (J2000)
(objra)
46- 68 E23.15 deg DEdeg MaNGA declination (J2000) (objdec)
70- 89 F20.18 --- Obslr Observed lambda_Re, stellar spin
parameter within 1Re (uncorrected)
(obs_lr)
91-110 F20.18 --- ObsVsig Observed V/sigma uncorrected
(obs_vsig)
112-131 F20.18 --- PSFCorrlr lambda_Re, stellar spin parameter
within 1Re, PSF-corrected
(psfcorr_lr)
133-152 F20.18 --- PSFcorrVsig V/sigma PSF-corrected (psfcorr_vsig)
154-173 F20.18 --- VsigPSFcorrDeproj V/sigma PSF-corrected and
deprojected (vsigpsfcorrdeproj)
175-194 F20.18 --- lrPSFcorrDeproj lambda_Re, stellar spin parameter
within 1Re, PSF-corrected and
deprojected (lamrpsfcorrdeproj)
196-213 F18.15 [Msun] logMstar log stellar mass from GSWLC
(logMstar) (1)
215-235 F21.18 [Msun/yr] logSEDSFR log SFR from GSWLC (logSEDSFR) (1)
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Note (1): From Salim et al., 2016ApJS..227....2S 2016ApJS..227....2S, 2018ApJ...859...11S 2018ApJ...859...11S.
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Acknowledgements:
Amelia Fraser-McKelvie, a.fraser-mckelvie(at)uwa.edu.au
References:
Salim et al., 2016ApJS..227....2S 2016ApJS..227....2S
Salim et al., 2018ApJ...859...11S 2018ApJ...859...11S
(End) Patricia Vannier [CDS] 22-Mar-2023