galaxies 2D phot. decompositions in SDSS-DR7 Virtual Observatory Resource

Authors
  1. Meert A.
  2. Vikram V.
  3. Bernardi M.
  4. Published by
    CDS
Abstract

We present a catalogue of 2D, point spread function-corrected de Vacouleurs, Sersic, de Vacouleurs+Exponential, and Sersic+Exponential fits of ~7x10^5^ spectroscopically selected galaxies drawn from the Sloan Digital Sky Survey (SDSS) Data Release 7. Fits are performed for the SDSS r band utilizing the fitting routine galfit and analysis pipeline pymorph. We compare these fits to prior catalogues. Fits are analysed using a physically motivated flagging system. The flags suggest that more than 90 percent of two-component fits can be used for analysis. We show that the fits follow the expected behaviour for early and late galaxy types. The catalogues provide a robust set of structural and photometric parameters for future galaxy studies. We show that some biases remain in the measurements, e.g. the presence of bars significantly affect the bulge measurements although the bulge ellipticity may be used to separate barred and non-barred galaxies, and about 15 percent of bulges of two-component fits are also affected by resolution. The catalogues are available in electronic format. We also provide an interface for generating postage stamp images of the 2D model and residual as well as the 1D profile. These images can be generated for a user-uploaded list of galaxies on demand.

Keywords
  1. galaxies
  2. catalogs
  3. astronomical-models
  4. visible-astronomy
  5. sloan-photometry
  6. galaxy-classification-systems
Bibliographic source Bibcode
2015MNRAS.446.3943M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/3943
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/446/3943
Document Object Identifer DOI
doi:10.26093/cds/vizier.74463943

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/3943
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/3943
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/3943
IVOA Table Access TAP
http://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).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/3943/catalog?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/3943/catalog?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/3943/catalog?

History

2016-10-06T15:08:24Z
Resource record created
2016-10-06T15:08:24Z
Created
2024-08-14T20:19:16Z
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