Merging dwarf galaxies in the local universe Virtual Observatory Resource

Authors
  1. Paudel S.
  2. Smith R.
  3. Yoon S.J.
  4. Calderon-Castillo P.
  5. Duc P.-A.
  6. Published by
    CDS
Abstract

We present the largest publicly available catalog of interacting dwarf galaxies. It includes 177 nearby merging dwarf galaxies of stellar mass M*<10^10^M_{sun}_ and redshifts z<0.02. These galaxies are selected by visual inspection of publicly available archival imaging from two wide-field optical surveys (SDSS-III and the Legacy Survey), and they possess low-surface-brightness features that are likely the result of an interaction between dwarf galaxies. We list UV and optical photometric data that we use to estimate stellar masses and star formation rates. So far, the study of interacting dwarf galaxies has largely been done on an individual basis, and lacks a sufficiently large catalog to give statistics on the properties of interacting dwarf galaxies, and their role in the evolution of low-mass galaxies. We expect that this public catalog can be used as a reference sample to investigate the effects of the tidal interaction on the evolution of star formation, and the morphology/structure of dwarf galaxies. Our sample is overwhelmingly dominated by star-forming galaxies, and they are generally found significantly below the red sequence in the color-magnitude relation. The number of early-type galaxies is only 3 out of 177. We classify them, according to observed low-surface-brightness features, into various categories including shells, stellar streams, loops, antennae, or simply interacting. We find that dwarf-dwarf interactions tend to prefer the low-density environment. Only 41 out of the 177 candidate dwarf-dwarf interaction systems have giant neighbors within a sky-projected distance of 700kpc and a line-of-sight radial velocity range +/-700km/s, and compared to the LMC-SMC, they are generally located at much larger sky-projected distances from their nearest giant neighbors.

Keywords
  1. galaxies
  2. visible-astronomy
  3. sloan-photometry
  4. ultraviolet-photometry
  5. redshifted
  6. galaxy-classification-systems
  7. surveys
  8. catalogs
Bibliographic source Bibcode
2018ApJS..237...36P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/237/36
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/237/36
Document Object Identifer DOI
doi:10.26093/cds/vizier.22370036

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/237/36
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/237/36
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/237/36
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/ApJS/237/36/dgal?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/237/36/dgal?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/237/36/dgal?

History

2018-11-19T08:15:58Z
Resource record created
2018-11-19T08:15:58Z
Created
2021-02-23T09:24:10Z
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