J/A+A/593/A114 CALIFA space density distribution of galaxies (Bekeraite+, 2016)
The space density distribution of galaxies in the absolute magnitude-rotation
velocity plane: a volume-complete Tully-Fisher relation from CALIFA stellar
kinematics.
Bekeraite S., Walcher C.J., Falcon-Barroso J., Garcia Lorenzo B.,
Lyubenova M., Sanchez S.F., Spekkens K., van de Ven G., Wisotzki L.,
Ziegler B., Aguerri J.A.L., Barrera-Ballesteros J., Bland-Hawthorn J.,
Catalan-Torrecilla C., Garcia-Benito R., the CALIFA collaboration
<Astron. Astrophys. 593, A114 (2016)>
=2016A&A...593A.114B 2016A&A...593A.114B (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxies, optical ; Galaxies, rotation
Keywords: galaxies: kinematics and dynamics - galaxies: statistics -
galaxies: evolution
Abstract:
We measure the distribution in absolute magnitude-circular velocity
space for a well-defined sample of 199 rotating Calar Alto Legacy
Integral Field Area Survey (CALIFA) galaxies using their stellar
kinematics. Our aim in this analysis is to avoid subjective selection
criteria and to take volume and large-scale structure factors into
account. Using stellar velocity fields instead of gas emission line
kinematics allows including rapidly rotating early type galaxies. Our
initial sample contains 277 galaxies with available stellar velocity
fields and growth curve r-band photometry. After rejecting 51 velocity
fields that could not be modelled due to the low number of bins,
foreground contamination or significant interaction we perform Markov
Chain Monte Carlo (MCMC) modelling of the velocity fields, obtaining
the rotation curve and kinematic parameters and their realistic
uncertainties. We perform an extinction correction and calculate the
circular velocity vcirc accounting for pressure support a given
galaxy has. The resulting galaxy distribution on the Mr-vcirc
plane is then modelled as a mixture of two distinct populations,
allowing robust a nd reproducible rejection of outliers, a significant
fraction of which are slow rotators. The selection effects are
understood well enough that the incompleteness of thesample can be
corrected for and the 199 galaxies can be weighted by volume and
large-scale structure factors enabling us to fit a volume-corrected
Tully-Fisher relation (TFR). More importantly, we also provide the
volume-corrected distribution of galaxies in the Mr-vcirc plane,
which can be compared with cosmological simulations. The joint
distribution of the luminosity and circular velocity space densities,
representative over the range of -20>Mr>-22mag, can place more
stringent constraints on the galaxy formation and evolution scenarios
than linear TFR fit parameters or the luminosity function alone.
Description:
Circular velocity, absolute r-band magnitude and associated
uncertainties for 199 CALIFA galaxies used to derive the Tully-Fisher
relation and 2D distribution. In the FITS image we provide both the
probability density and space density distributions in the
vcirc-Mr plane.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 75 2 List of fits file extensions
tfr.fit 2880 227 Fits file
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See also:
J/A+A/573/A59 : Gas kinematics in CALIFA survey (Garcia-Lorenzo+, 2015)
J/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015)
J/A+A/581/A103 : CALIFA survey across the Hubble sequence (Gonzalez+, 2015)
J/A+A/584/A87 : CALIFA sample SFR calibration (Catalan-Torrecilla+, 2015)
J/A+A/585/A47 : CALIFA color/metallicity gradients connections (Marino+, 2016)
J/A+A/587/A70 : CALIFA face-on spiral galaxies oxygen
(Sanchez-Menguiano+, 2016)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Nx [200] Number of pixels along X-axis
5- 7 I3 --- Ny [200] Number of pixels along Y-axis
9- 11 I3 Kibyte size [321] Size of FITS file
13 I1 --- Ext [1/2] Extension number
15- 21 A7 --- FileName Name of FITS file
23- 75 A53 --- Title Title of the extension image
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Acknowledgements:
Simona Bekerait, simona(at)technarium.lt
(End) Simona Bekerait [AIP, Germany], Patricia Vannier [CDS] 25-May-2016