The Library
Quasi-periodic pulsations in the most powerful solar flare of cycle 24
Tools
Kolotkov, Dmitrii, Pugh, Chloe E., Broomhall, Anne-Marie and Nakariakov, V. M. (Valery M.) (2018) Quasi-periodic pulsations in the most powerful solar flare of cycle 24. The Astrophysical Journal, 858 (1). L3. doi:10.3847/2041-8213/aabde9 ISSN 0004-637X.
|
PDF
WRAP-Quasi-periodic-pulsations-in-the-most-powerful-Kolotkov-2018.pdf - Accepted Version - Requires a PDF viewer. Download (791Kb) | Preview |
Official URL: http://dx.doi.org/10.3847/2041-8213/aabde9
Abstract
Quasi-periodic pulsations (QPPs) are common in solar flares and are now regularly observed in stellar flares. We present the detection of two different types of QPP signals in the thermal emission light curves of the X9.3-class solar flare SOL2017-09-06T12:02, which is the most powerful flare of Cycle 24. The period of the shorter-period QPP drifts from about 12 to 25 s during the flare. The observed properties of this QPP are consistent with a sausage oscillation of a plasma loop in the flaring active region. The period of the longer-period QPP is about 4 to 5 minutes. Its properties are compatible with standing slow magnetoacoustic oscillations, which are often detected in coronal loops. For both QPP signals, other mechanisms such as repetitive reconnection cannot be ruled out, however. The studied solar flare has an energy in the realm of observed stellar flares, and the fact that there is evidence of a short-period QPP signal typical of solar flares along with a long-period QPP signal more typical of stellar flares suggests that the different ranges of QPP periods typically observed in solar and stellar flares is likely due to observational constraints, and that similar physical processes may be occurring in solar and stellar flares.
Item Type: | Journal Article | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
Library of Congress Subject Headings (LCSH): | Solar flares, Solar oscillations, Solar radiation | |||||||||
Journal or Publication Title: | The Astrophysical Journal | |||||||||
Publisher: | Institute of Physics Publishing, Inc. | |||||||||
ISSN: | 0004-637X | |||||||||
Official Date: | 26 April 2018 | |||||||||
Dates: |
|
|||||||||
Volume: | 858 | |||||||||
Number: | 1 | |||||||||
Article Number: | L3 | |||||||||
DOI: | 10.3847/2041-8213/aabde9 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Date of first compliant deposit: | 30 April 2018 | |||||||||
Date of first compliant Open Access: | 30 April 2018 | |||||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year