Emission in local volume dwarf galaxies Virtual Observatory Resource

Authors
  1. Karachentsev I.D.
  2. Kaisin S.S.
  3. Published by
    CDS
Abstract

We used the H{alpha} images from a large sample of nearby late-type dwarf galaxies to investigate properties of their emission structure. The sample consists of 300 galaxies of the irregular (Irr), Magellanic irregular (Im), blue compact dwarf (BCD), and transition (Tr) types situated within a distance of 11Mpc. In each galaxy, we indicated the number of compact HII regions, the presence of bubble-like or filament-like structures, the presence of a faint diffuse emission, and a sign of the global burst. The larger the luminosity of a galaxy, the greater number of compact HII sources in it. The integral and specific star formation rates (SFRs) of the dwarf increase steeply with the increase of the number of HII regions showing the evidence of the epidemic character of the star formation process. The dwarf galaxies with emission-line bubbles, or filaments, or signs of the global star formation burst have approximately the same hydrogen-mass-to-luminosity ratio as that of the whole sample objects. However, their mean SFR is significantly higher than that of other galaxies in the sample. Emission bubble-like structures are found in the nearby dwarfs with a frequency of one case per four to five galaxies. Their linear diameters are close to those expected for supernova remnants. The mean specific SFR for the nearby late-type dwarfs is close to the Hubble parameter, H_0_=-10.14dex/yr, consistent with the sluggish cosmic star formation history of galaxies of this kind.

Keywords
  1. dwarf-galaxies
  2. galaxies
  3. star-forming-regions
  4. visible-astronomy
  5. infrared-astronomy
  6. ultraviolet-astronomy
Bibliographic source Bibcode
2020MNRAS.495.3592K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/3592
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/495/3592

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/3592
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/3592
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/3592
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/495/3592/tablea1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/3592/tablea1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/3592/tablea1?

History

2023-09-14T14:12:08Z
Resource record created
2023-09-14T13:13:33Z
Updated
2023-09-14T14:12:08Z
Created

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