Galaxies in Lynx-Cancer void Virtual Observatory Resource

Authors
  1. Perepelitsyna Y.A.
  2. Pustilnik S.A.
  3. Kniazev A.Y.
  4. Published by
    CDS
Abstract

In this work we present the results of photometrical study of 85 objects from the updated sample of galaxies residing in the nearby Lynx-Cancer void. The images in filters u,g,r,i from the Sloan Digital Sky Survey database are used for photometry. The following model-independent parameters are obtained: integrated magnitudes and colours, effective radii and the respective surface brightnesses, optical and Holmberg radii. On results of the radial surface brightness profile analysis, their central values and scalelengths of model discs are derived. The colours of the outer parts of void galaxies are examined and compared to those of the model evolutionary tracks of the PEGASE2 package. This allowed to obtain estimates of the time since the epoch of star formation T_SF_. Among the latter group, the low-luminosity objects with M_B_>-13.2 dominate. The derived integrated absolute magnitudes and colours are used for galaxy stellar mass estimates. All available data on integrated galaxy HI fluxes are used to derive their parameter M(HI)/L_B_ and to estimate their gas mass-fraction. The small ~10% subgroup of the most gas-rich galaxies, with M(HI)/L_B_>2.5, shows gas mass-fractions reaching (94-99)%. Many of these objects also show atypically blue colours of their outer parts. To check possible statistical differences of void galaxy properties and galaxy samples formed with more general criteria, we compared the void sample galaxy parameters with those of 195 galaxies from the Equatorial Survey (ES), formed as a part of the blind HI survey HIPASS. In the common luminosity range (-18.5<M_g_<-13.5) the compared samples show similarity. The lowest luminosity void galaxies differ from the main ES sample. However, there are also ~7% faint so called 'inchoate' galaxies among ES sample with the elevated parameter M(HI)/L_B_, majority of which are situated far from massive neighbours and are probably the analogs of void galaxies.

Keywords
  1. galaxies
  2. photometry
  3. optical-observation
  4. catalogs
  5. infrared-photometry
  6. visible-astronomy
  7. Wide-band photometry
Bibliographic source Bibcode
2014AstBu..69..247P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/AstBu/69.247
IVOA Identifier IVOID
ivo://CDS.VizieR/J/other/AstBu/69.247

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/AstBu/69.247
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/AstBu/69.247
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/AstBu/69.247
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/other/AstBu/69.247/lc_photo?
https://vizier.iucaa.in/viz-bin/conesearch/J/other/AstBu/69.247/lc_photo?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/AstBu/69.247/lc_photo?

History

2014-08-30T11:31:58Z
Resource record created
2014-08-30T11:31:58Z
Created
2017-12-05T05:10:17Z
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