2D decomposition of CALIFA galaxies

DOI

We present a two-dimensional multi-component photometric decomposition of 404 galaxies from the Calar Alto Legacy Integral Field Area Data Release 3 (CALIFA-DR3). They represent all possible galaxies with no clear signs of interaction and not strongly inclined in the final CALIFA data release. Galaxies are modelled in the g, r, and i Sloan Digital Sky Survey (SDSS) images including, when appropriate, a nuclear point source, bulge, bar, and an exponential or broken disc component. We use a human-supervised approach to determine the optimal number of structures to be included in the fit. The dataset, including the photometric parameters of the CALIFA sample, is released together with statistical errors and a visual analysis of the quality of each fit. The analysis of the photometric components reveals a clear segregation of the structural composition of galaxies with stellar mass. At high masses (log(M/M_{sun}_)>11), the galaxy population is dominated by galaxies modelled with a single Sersic or a bulge+disc with a bulge-to-total (B/T) luminosity ratio B/T>0.2. At intermediate masses (9.5<log(M/M_{sun})<11), galaxies described with bulge+disc but B/T<0.2 are preponderant, whereas, at the low mass end (log(M*/M{\sun}_)<9.5), the prevailing population is constituted by galaxies modelled with either pure discs or nuclear point sources+discs (i.e., no discernible bulge). The analyses of the extended multi-component radial profile result in a volume-corrected distribution of 62%, 28%, and 10% for the so-called Type I (pure exponential), Type II (down-bending), and Type III (up-bending) disc profiles, respectively. These fractions are in discordance with previous findings. We argue that the different methodologies used to detect the breaks are the main cause for these differences.

Cone search capability for table J/A+A/598/A32/table1 (Structural parameters of the galaxies)

Identifier
DOI http://doi.org/10.26093/cds/vizier.35980032
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/598/A32
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/598/A32
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/598/A32
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/598/A32
Provenance
Creator Mendez-Abreu J.; Ruiz-Lara T.; Sanchez-Menguiano L.; de Lorenzo-Caceres A.,Costantin L.; Catalan-Torrecilla C.; Florido E.; Aguerri J.A.L.,Bland-Hawthorn J.; Corsini E.M.; Dettmar R.J.; Galbany L.; Garcia-Benito R.,Marino R.A.; Marquez I.; Ortega-Minakata R.A.; Papaderos P.; Sanchez S.F.,Sanchez-Blazquez P.; Spekkens K.; van de Ven G.; Wild V.; Ziegler B.
Publisher CDS
Publication Year 2017
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics