The Library
Statistical properties of quasi-periodic pulsations in white-light flares observed with Kepler
Tools
Pugh, Chloe E., Armstrong, David J., Nakariakov, V. M. (Valery M.) and Broomhall, Anne-Marie (2016) Statistical properties of quasi-periodic pulsations in white-light flares observed with Kepler. Monthly Notices of the Royal Astronomical Society, 459 (4). pp. 3659-3676. doi:10.1093/mnras/stw850 ISSN 0035-8711.
PDF
WRAP_9877890-px-120416-keplerqpp_050416.pdf - Accepted Version - Requires a PDF viewer. Download (2339Kb) |
Official URL: https://dx.doi.org/10.1093/mnras/stw850
Abstract
We embark on a study of quasi-periodic pulsations (QPPs) in the decay phase of white-light stellar flares observed by Kepler. Out of the 1439 flares on 216 different stars detected in the short-cadence data using an automated search, 56 flares are found to have pronounced QPP-like signatures in the light curve, of which 11 have stable decaying oscillations. No correlation is found between the QPP period and the stellar temperature, radius, rotation period and surface gravity, suggesting that the QPPs are independent of global stellar parameters. Hence they are likely to be the result of processes occurring in the local environment. There is also no significant correlation between the QPP period and flare energy, however there is evidence that the period scales with the QPP decay time for the Gaussian damping scenario, but not to a significant degree for the exponentially damped case. This same scaling has been observed for MHD oscillations on the Sun, suggesting that they could be the cause of the QPPs in those flares. Scaling laws of the flare energy are also investigated, supporting previous reports of a strong correlation between the flare energy and stellar temperature/radius. A negative correlation between the flare energy and stellar surface gravity is also found.
Item Type: | Journal Article | ||||||||
---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||||||
Divisions: | Other > Institute of Advanced Study Faculty of Science, Engineering and Medicine > Science > Physics |
||||||||
Library of Congress Subject Headings (LCSH): | Stars, Sun , Solar flares | ||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
Publisher: | Oxford University Press | ||||||||
ISSN: | 0035-8711 | ||||||||
Official Date: | 11 July 2016 | ||||||||
Dates: |
|
||||||||
Volume: | 459 | ||||||||
Number: | 4 | ||||||||
Page Range: | pp. 3659-3676 | ||||||||
DOI: | 10.1093/mnras/stw850 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 12 April 2016 | ||||||||
Date of first compliant Open Access: | 11 August 2016 | ||||||||
Funder: | European Research Council (ERC), Seventh Framework Programme (European Commission) (FP7), Science and Technology Facilities Council (Great Britain) (STFC), United States. National Aeronautics and Space Administration (NASA) | ||||||||
Grant number: | Project No. 321141 (ERC), No. 313014 (ETAEARTH) (FP7), ST/L000733/1 (STFC) | ||||||||
Open Access Version: |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year