Bulge+disk decompositions of SDSS galaxies Virtual Observatory Resource

Authors
  1. Simard L.
  2. Trevor Mendel J.
  3. Patton D.R.
  4. Ellison S.L.
  5. McConnachie A.W.
  6. Published by
    CDS
Abstract

We perform two-dimensional, point-spread-function-convolved, bulge+disk decompositions in the g and r bandpasses on a sample of 1123718 galaxies from the Legacy area of the Sloan Digital Sky Survey Data Release Seven. Four different decomposition procedures are investigated which make improvements to sky background determinations and object deblending over the standard SDSS procedures that lead to more robust structural parameters and integrated galaxy magnitudes and colors, especially in crowded environments. We use a set of science-based quality assurance metrics, namely, the disk luminosity-size relation, the galaxy color-magnitude diagram, and the galaxy central (fiber) colors to show the robustness of our structural parameters. The best procedure utilizes simultaneous, two-bandpass decompositions. Bulge and disk photometric errors remain below 0.1mag down to bulge and disk magnitudes of g~19 and r~18.5. We also use and compare three different galaxy fitting models: a pure Sersic model, an n_b_=4 bulge+disk model, and a Sersic (free n_b_) bulge+disk model. The most appropriate model for a given galaxy is determined by the F-test probability. All three catalogs of measured structural parameters, rest-frame magnitudes, and colors are publicly released here.

Keywords
  1. galaxies
  2. visible-astronomy
  3. sloan-photometry
  4. stellar-evolutionary-models
  5. surveys
  6. catalogs
  7. galaxy-classification-systems
Bibliographic source Bibcode
2011ApJS..196...11S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/196/11
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/196/11
Document Object Identifer DOI
doi:10.26093/cds/vizier.21960011

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/196/11
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/196/11
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/196/11
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/196/11/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/196/11/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/196/11/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/196/11/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/196/11/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/196/11/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/196/11/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/196/11/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/196/11/table3?

History

2012-01-05T23:09:29Z
Resource record created
2012-01-05T23:09:29Z
Created
2017-04-26T12:35:22Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr