Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Outbursts in two new cool pulsating DA white dwarfs

Tools
- Tools
+ Tools

Bell, Keaton J., Hermes, J. J., Montgomery, M. H., Gentile Fusillo, N. P., Raddi, R., Gänsicke, B. T. (Boris T.), Winget, D. E., Dennihy, E., Gianninas, A., Tremblay, Pier-Emmanuel, Chote, Paul and Winget, K. I. (2016) Outbursts in two new cool pulsating DA white dwarfs. The Astrophysical Journal, 829 (2). p. 82. doi:10.3847/0004-637X/829/2/82 ISSN 0004-637X.

[img]
Preview
PDF
WRAP_Bell_2016_ApJ_829_82.pdf - Published Version - Requires a PDF viewer.

Download (1803Kb) | Preview
Official URL: http://dx.doi.org/10.3847/0004-637X/829/2/82

Request Changes to record.

Abstract

The unprecedented extent of coverage provided by Kepler observations recently revealed outbursts in two hydrogen-atmosphere pulsating white dwarfs (DAVs) that cause hours-long increases in the overall mean flux of up to 14%. We have identified two new outbursting pulsating white dwarfs in K2, bringing the total number of known outbursting white dwarfs to four. EPIC 211629697, with ${T}_{\mathrm{eff}}$ = 10,780 ± 140 K and $\mathrm{log}\,g$ = 7.94 ± 0.08, shows outbursts recurring on average every 5.0 days, increasing the overall flux by up to 15%. EPIC 229227292, with ${T}_{\mathrm{eff}}$ = 11,190 ± 170 K and $\mathrm{log}\,g$ = 8.02 ± 0.05, has outbursts that recur roughly every 2.4 days with amplitudes up to 9%. We establish that only the coolest pulsating white dwarfs within a small temperature range near the cool, red edge of the DAV instability strip exhibit these outbursts.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): White dwarf stars, Stellar activity, Astrophysics
Journal or Publication Title: The Astrophysical Journal
Publisher: Institute of Physics Publishing, Inc.
ISSN: 0004-637X
Official Date: 23 September 2016
Dates:
DateEvent
23 September 2016Published
1 July 2016Accepted
16 May 2016Submitted
Volume: 829
Number: 2
Number of Pages: 11
Page Range: p. 82
DOI: 10.3847/0004-637X/829/2/82
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 13 March 2017
Date of first compliant Open Access: 14 March 2017
Funder: National Science Foundation (U.S.) (NSF), United States. National Aeronautics and Space Administration (NASA), Seventh Framework Programme (European Commission) (FP7), European Research Council (ERC)
Grant number: AST-1312983 (NSF), NNX13AC23G (NASA), HST-HF2-51357.001-A (NASA), FP/2007-2013 (FP7), No. 320964 (ERC), AST-1312678 (NSF), NNX14AF65G (NASA)

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics

twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us