Morphologies of z<0.01 SDSS-DR7 galaxies Virtual Observatory Resource

Authors
  1. Ann H.B.
  2. Seo M.
  3. Ha D.K.
  4. Published by
    CDS
Abstract

The morphological types of 5836 galaxies were classified by a visual inspection of color images using the Sloan Digital Sky Survey Data Release 7 to produce a morphology catalog of a representative sample of local galaxies with z<0.01. The sample galaxies are almost complete for galaxies brighter than r_pet_=17.77. Our classification system is basically the same as that of the Third Reference Catalog of Bright Galaxies with some simplifications for giant galaxies. On the other hand, we distinguish the fine features of dwarf elliptical (dE)-like galaxies to classify five subtypes: dE, blue-cored dwarf ellipticals, dwarf spheroidals (dSph), blue dwarf ellipticals (dE_blue_), and dwarf lenticulars (dS0). In addition, we note the presence of nucleation in dE, dSph, and dS0. Elliptical galaxies and lenticular galaxies contribute only ~1.5 and 4.9% of local galaxies, respectively, whereas spirals and irregulars contribute ~32.1 and ~42.8%, respectively. The dE_blue_ galaxies, which are a recently discovered population of galaxies, contribute a significant fraction of dwarf galaxies. There seem to be structural differences between dSph and dE galaxies. The dSph galaxies are fainter and bluer with a shallower surface brightness gradient than dE galaxies. They also have a lower fraction of galaxies with small axis ratios (b/a<~0.4) than dE galaxies. The mean projected distance to the nearest neighbor galaxy is ~260 kpc. About 1% of local galaxies have no neighbors with comparable luminosity within a projected distance of 2Mpc.

Keywords
  1. galaxies
  2. galaxy-classification-systems
  3. visible-astronomy
  4. sloan-photometry
Bibliographic source Bibcode
2015ApJS..217...27A
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/217/27
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/217/27
Document Object Identifer DOI
doi:10.26093/cds/vizier.22170027

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/217/27
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/217/27
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/217/27
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/217/27/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/217/27/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/217/27/table1?

History

2015-05-18T13:12:40Z
Resource record created
2015-05-18T13:12:40Z
Created
2017-12-22T05:32:02Z
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