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

Doubling of minute-long Quasi-Periodic Pulsations from super-flares on a low mass star

Tools
- Tools
+ Tools

Doyle, J. Gerry, Irawati, Puji, Kolotkov, Dmitrii, Ramsay, Gavin, Nhalil, Nived Vilangot, Dhillon, Vik S., Marsh, Tom and Yadav, Ram Kesh (2022) Doubling of minute-long Quasi-Periodic Pulsations from super-flares on a low mass star. Monthly Notices of the Royal Astronomical Society, 514 (4). pp. 5178-5182. doi:10.1093/mnras/stac1695 ISSN 1365-2966.

[img]
Preview
PDF
WRAP-Doubling-minute-long-Quasi-Periodic-pulsations-super-flares-2022.pdf - Accepted Version - Requires a PDF viewer.

Download (1876Kb) | Preview
Official URL: https://doi.org/10.1093/mnras/stac1695

Request Changes to record.

Abstract

Using the ULTRASPEC instrument mounted on the 2.4-m Thai National Telescope, we observed two large flares, each with a total energy close to 1034 erg with sub-second cadence. A combination of a wavelet analysis, a Fourier transform plus an empirical mode decomposition, reveals quasi-period pulsations (QPP) which exhibit an apparent doubling of the oscillation period. Both events showed oscillations of a few minutes over a interval of several minutes, and despite the availability of sub-second cadence, there was no evidence of sub-minute oscillations. The doubling of the QPP periods and shorter lifetime of shorter-period QPP modes strongly favour resonant dynamics of magnetohydrodynamic waves in a coronal loop. We estimate loop lengths to be 0.2–0.7 R⋆, in agreement with a typical length of solar coronal loops. These observations presents rare and compelling evidence for the presence of compact plasma loops in a stellar corona.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Stars, M stars, Astrophysics, Stars -- Rotation, Flare stars, Stars -- Formation, Low mass stars
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Oxford University Press (OUP)
ISSN: 1365-2966
Official Date: August 2022
Dates:
DateEvent
August 2022Published
21 June 2022Available
13 June 2022Accepted
Volume: 514
Number: 4
Page Range: pp. 5178-5182
DOI: 10.1093/mnras/stac1695
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 3 August 2022
Date of first compliant Open Access: 3 August 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275
ST/T000252/1[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
ST/T000406/1[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
Related URLs:
  • https://academic.oup.com/journals/pages/...

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