Rapidly pulsating sdB stars search with GALEX Virtual Observatory Resource

Authors
  1. Boudreaux T.M.
  2. Barlow B.N.
  3. Fleming S.W.
  4. Soto A.V.
  5. Million C.,Reichart D.E.
  6. Haislip J.B.
  7. Linder T.R.
  8. Moore J.P.
  9. Published by
    CDS
Abstract

NASA's Galaxy Evolution Explorer (GALEX) provided near- and far-UV observations for approximately 77% of the sky over a 10-year period; however, the data reduction pipeline initially only released single NUV and FUV images to the community. The recently released Python module gPhoton changes this, allowing calibrated time-series aperture photometry to be extracted easily from the raw GALEX data set. Here we use gPhoton to generate light curves for all hot subdwarf B (sdB) stars that were observed by GALEX, with the intention of identifying short-period, p-mode pulsations. We find that the spacecraft's short visit durations, uneven gaps between visits, and dither pattern make the detection of hot subdwarf pulsations difficult. Nonetheless, we detect UV variations in four previously known pulsating targets and report their UV pulsation amplitudes and frequencies. Additionally, we find that several other sdB targets not previously known to vary show promising signals in their periodograms. Using optical follow-up photometry with the Skynet Robotic Telescope Network, we confirm p-mode pulsations in one of these targets, LAMOST J082517.99+113106.3, and report it as the most recent addition to the sdBVr class of variable stars.

Keywords
  1. subdwarf-stars
  2. ultraviolet-astronomy
  3. variable-stars
Bibliographic source Bibcode
2017ApJ...845..171B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/845/171
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/845/171
Document Object Identifer DOI
doi:10.26093/cds/vizier.18450171

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/845/171
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/845/171
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/845/171
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/ApJ/845/171/sdb?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/845/171/sdb?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/845/171/sdb?

History

2018-05-22T09:21:00Z
Resource record created
2018-05-22T09:21:00Z
Created
2019-03-27T08:34:58Z
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