ChaMPlane deep galactic bulge survey. I. Virtual Observatory Resource

Authors
  1. van den Berg M.
  2. Hong J.
  3. Grindlay J.E.
  4. Published by
    CDS
Abstract

We have carried out a deep X-ray and optical survey with Chandra and HST of low-extinction regions in the Galactic bulge. Here we present the results of a search for low-luminosity (L_X_<~10^34^erg/s) accreting binaries among the Chandra sources in the region closest to the Galactic center, at an angular offset of 1.4{deg}, that we have named the Limiting Window (LW). Based on their blue optical colors, excess H{alpha} fluxes, and high X-ray-to-optical flux ratios, we identify three likely accreting binaries; these are probably white dwarfs accreting from low-mass companions (cataclysmic variables; CVs) although we cannot exclude that they are quiescent neutron-star or black-hole low-mass X-ray binaries. Distance estimates put these systems farther than >~2kpc. Based on their H{alpha}-excess fluxes and/or high X-ray-to-optical flux ratios, we find 22 candidate accreting binaries; however, the properties of some can also be explained if they are dMe stars or active galaxies.

Keywords
  1. cataclysmic-variable-stars
  2. x-ray-sources
  3. surveys
  4. hst-photometry
Bibliographic source Bibcode
2009ApJ...700.1702V
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/700/1702
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/700/1702
Document Object Identifer DOI
doi:10.26093/cds/vizier.17001702

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/700/1702
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/700/1702
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/700/1702
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/700/1702/lw_opt?
IVOA Cone Search SCS
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/700/1702/table1?

History

2011-09-21T15:47:03Z
Resource record created
2011-09-21T15:47:03Z
Created
2017-06-30T05:47:47Z
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