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First Kepler results on compact pulsators - VI. Targets in the final half of the survey phase

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Østensen, R. H., Silvotti, R., Charpinet, S., Oreiro, R., Bloemen, S., Baran, A. S., Reed, M. D., Kawaler, Steven D., Telting, J., Green, Elizabeth Melton et al.
. (2011) First Kepler results on compact pulsators - VI. Targets in the final half of the survey phase. Monthly Notices of the Royal Astronomical Society, Vol.414 (No.4). pp. 2860-2870. ISSN 0035-8711

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Abstract

We present results from the final 6 months of a survey to search for pulsations in white dwarfs (WDs) and hot subdwarf stars with the Kepler spacecraft. Spectroscopic observations are used to separate the objects into accurate classes, and we explore the physical parameters of the subdwarf B (sdB) stars and white dwarfs in the sample. From the Kepler photometry and our spectroscopic data, we find that the sample contains five new pulsators of the V1093 Her type, one AMCVn type cataclysmic variable and a number of other binary systems. This completes the survey for compact pulsators with Kepler. No V361 Hya type of short-period pulsating sdB stars were found in this half, leaving us with a total of one single multiperiodic V361 Hya and 13 V1093 Her pulsators for the full survey. Except for the sdB pulsators, no other clearly pulsating hot subdwarfs or white dwarfs were found, although a few low-amplitude candidates still remain. The most interesting targets discovered in this survey will be observed throughout the remainder of the Kepler mission, providing the most long-term photometric data sets ever made on such compact, evolved stars. Asteroseismic investigations of these data sets will be invaluable in revealing the interior structure of these stars and will boost our understanding of their evolutionary history.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Stellar oscillations, Double stars, White dwarf stars, Dwarf stars
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Wiley-Blackwell Publishing, Inc
ISSN: 0035-8711
Date: July 2011
Volume: Vol.414
Number: No.4
Page Range: pp. 2860-2870
Identification Number: 10.1111/j.1365-2966.2011.18405.x
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: United States. National Aeronautics and Space Administration. Science Mission Directorate (SMD), European Research Council (ERC) , Katholieke Universiteit te Leuven (1970- ) (KUL), Poland. Ministerstwo Nauki i Szkolnictwa Wyższego [Ministry of Science and Higher Education] (MNiSW) , Programme National de Physique Stellaire (PNPS, CNRS/INSU, France) , Institut national des sciences de l'univers (France) (INSU)
Grant number: 227224 (ERC) , GOA/2008/04 (KUL), 554/MOB/2009/0 (MNiSW)
URI: http://wrap.warwick.ac.uk/id/eprint/38679

Data sourced from Thomson Reuters' Web of Knowledge

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