Star formation regions in nearby dwarf galaxies Virtual Observatory Resource

Authors
  1. Melena N.W.
  2. Elmegreen B.G.
  3. Hunter D.A.
  4. Zernow L.
  5. Published by
    CDS
Abstract

We compare star formation in the inner and outer disks of 11 dwarf irregular galaxies (dIm) within 3.6Mpc. The regions are identified on Galaxy Evolution Explorer near-UV images, and modeled with UV, optical, and near-IR colors to determine masses and ages. A few galaxies have made 10^5^-10^6^M_{sun}_ complexes in a starburst phase, while others have not formed clusters in the last 50Myr. The maximum region mass correlates with the number of regions as expected from the size-of-sample effect. We find no radial gradients in region masses and ages, even beyond the realm of H{alpha} emission, although there is an exponential decrease in the luminosity density and number density of the regions with radius. H{alpha} is apparently lacking in the outer parts only because nebular emission around massive stars is too faint to see. The outermost regions for the five galaxies with HI data formed at average gas surface densities of 1.9-5.9M_{sun}/pc^2^.

Keywords
  1. galaxies
  2. ultraviolet-astronomy
  3. visible-astronomy
  4. Wide-band photometry
Bibliographic source Bibcode
2009AJ....138.1203M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1203
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/138/1203
Document Object Identifer DOI
doi:10.26093/cds/vizier.51381203

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/138/1203
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/138/1203
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/138/1203
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/AJ/138/1203/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/1203/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/1203/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/138/1203/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/1203/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/1203/table3?

History

2012-02-10T08:07:33Z
Resource record created
2012-02-10T08:07:33Z
Created
2017-12-21T15:26:23Z
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