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  White dwarf variability with gPhoton: pulsators

Tucker, M. A., Fleming, S. W., Pelisoli, I., Romero, A., Bell, K. J., Kepler, S. O., et al. (2018). White dwarf variability with gPhoton: pulsators. Monthly Notices of the Royal Astronomical Society, 475(4), 4768-4780. doi:10.1093/mnras/stx3297.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-4FDE-C Version Permalink: http://hdl.handle.net/21.11116/0000-0003-4FDF-B
Genre: Journal Article

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 Creators:
Tucker, Michael A, Author
Fleming, Scott W, Author
Pelisoli, Ingrid, Author
Romero, Alejandra, Author
Bell, Keaton J.1, Author              
Kepler, S O, Author
Caton, Daniel B, Author
Debes, John, Author
Montgomery, Michael H, Author
Thompson, Susan E, Author
Koester, Detlev, Author
Million, Chase, Author
Shiao, Bernie, Author
Affiliations:
1Max Planck Research Group in Stellar Ages and Galactic Evolution (SAGE), Max Planck Institute for Solar System Research, Max Planck Society, ou_2265636              

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Free keywords: techniques: photometric, stars: oscillations, white dwarfs, ultraviolet: stars
 Abstract: We present results from a search for short time-scale white dwarf variability using gPhoton, a time-tagged data base of GALEX photon events and associated software package. We conducted a survey of 320 white dwarf stars in the McCook–Sion catalogue, inspecting each for photometric variability with particular emphasis on variability over time-scales less than ∼30  min. From that survey, we present the discovery of a new pulsating white dwarf: WD 2246-069. A Ca ii K line is found in archival ESO spectra and an IR excess is seen in WISE W1 and W2 bands. Its independent modes are identified in follow-up optical photometry and used to model its interior structure. Additionally, we detect UV pulsations in four previously known pulsating ZZ Ceti-type (DAVs). Included in this group is the simultaneous fitting of the pulsations of WD 1401-147 in optical, near-ultraviolet and far-ultraviolet bands using nearly concurrent Whole Earth Telescope and GALEX data, providing observational insight into the wavelength dependence of white dwarf pulsation amplitudes.

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Language(s): eng - English
 Dates: 2019-04-042018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stx3297
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 475 (4) Sequence Number: - Start / End Page: 4768 - 4780 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150