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Slow magnetoacoustic oscillations in stellar coronal loops
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Lim, Daye, Nakariakov, Valery M. and Moon, Yong-Jae (2022) Slow magnetoacoustic oscillations in stellar coronal loops. The Astrophysical Journal, 931 (1). p. 63. doi:10.3847/1538-4357/ac69d8 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.3847/1538-4357/ac69d8
Abstract
Slow magnetoacoustic oscillations in stellar coronal loops with gravitational stratification are analyzed with a numerical solution of the boundary value problem for eigenvalues and eigenfunctions. In this study, we only focus on the resonant periods. The effects of the gravitational stratification, star mass, loop temperature, and loop length on the properties of slow magnetoacoustic oscillations are investigated. It is shown that the discrepancy between stratified and nonstratified loops is higher in density perturbations than in velocity perturbations. When the star has a larger mass, higher coronal temperature, and longer loop, the density perturbations in the stratified loop are significantly different from the harmonic functions. The periods in the stratified loop are slightly longer than in the nonstratified loop. The periods calculated in our model (14–644 minutes) are consistent with the periods of stellar quasi-periodic pulsations observed in both soft X-rays (2–70 minutes) and white lights (8–390 minutes).
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Solar flares -- Magnetic fields, Solar cycle, Astrophysics, Magnetohydrodynamics, Sun -- Corona, Sun -- Temperature | |||||||||||||||
| Journal or Publication Title: | The Astrophysical Journal | |||||||||||||||
| Publisher: | Institute of Physics Publishing, Inc. | |||||||||||||||
| ISSN: | 0004-637X | |||||||||||||||
| Official Date: | 25 May 2022 | |||||||||||||||
| Dates: |
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| Volume: | 931 | |||||||||||||||
| Number: | 1 | |||||||||||||||
| Page Range: | p. 63 | |||||||||||||||
| DOI: | 10.3847/1538-4357/ac69d8 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
| Date of first compliant deposit: | 28 June 2022 | |||||||||||||||
| Date of first compliant Open Access: | 28 June 2022 | |||||||||||||||
| RIOXX Funder/Project Grant: |
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