Bibcode
Bekeraité, S.; Walcher, C. J.; Falcón-Barroso, J.; Garcia Lorenzo, B.; Lyubenova, M.; Sánchez, S. F.; Spekkens, K.; van de Ven, G.; Wisotzki, L.; Ziegler, B.; Aguerri, J. A. L.; Barrera-Ballesteros, J.; Bland-Hawthorn, J.; Catalán-Torrecilla, C.; García-Benito, R.
Bibliographical reference
Astronomy and Astrophysics, Volume 593, id.A114, 16 pp.
Advertised on:
10
2016
Journal
Citations
9
Refereed citations
9
Description
We measured the distribution in absolute magnitude - circular velocity
space for a well-defined sample of 199 rotating galaxies of the Calar
Alto Legacy Integral Field Area Survey (CALIFA) 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 because of the low number of bins,
foreground contamination, or significant interaction, we performed
Markov chain Monte Carlo modelling of the velocity fields, from which we
obtained the rotation curve and kinematic parameters and their realistic
uncertainties. We performed an extinction correction and calculated the
circular velocity vcirc accounting for the pressure support
of a given galaxy. The resulting galaxy distribution on the
Mr-vcirc plane was then modelled as a mixture of
two distinct populations, allowing robust and reproducible rejection of
outliers, a significant fraction of which are slow rotators. The
selection effects are understood well enough that we were able to
correct for the incompleteness of the sample. The 199 galaxies were
weighted by volume and large-scale structure factors, which enabled 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 > -22 mag, can place more stringent constraints on
the galaxy formation and evolution scenarios than linear TFR fit
parameters or the luminosity function alone.
Galaxies main parameters and FITS files of 2D distributions are only
available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr
(ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/593/A114