The Library
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
|
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
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 > 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: |
|
||||||||
| 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 | ||||||||
| 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 |
Downloads
Downloads per month over past year
