Study of quiescent state X-ray emission from flare stars (original) (raw)
Navbar Search Filter Mobile Enter search term Search
- Issues
- Advance Access
- More content
- Submit
- Alerts
- About
- Journals on Oxford Academic
- Books on Oxford Academic
Journal Article
,
Search for other works by this author on:
,
Search for other works by this author on:
Search for other works by this author on:
Revision received:
21 August 1985
Cite
P. C. Agrawal, A. R. Rao, B. V. Sreekantan, Study of quiescent state X-ray emission from flare stars, Monthly Notices of the Royal Astronomical Society, Volume 219, Issue 2, March 1986, Pages 225–239, https://doi.org/10.1093/mnras/219.2.225
Close
Navbar Search Filter Mobile Enter search term Search
Abstract
Results on the X-ray emission from flare stars observed with the imaging proportional counter (IPC) on the Einstein Observatory are described. The mean value of the quiescent state X-ray luminosity _L_x of the seven detected flare stars is found to be |$\sim2\times10^{28}\enspace\text {erg}\enspace\text{s}^{-1}$|. Analysis of the energy spectra of three of the stars gives the value of the corona temperature as 3×106 K. Results on gradual flux variations by a factor of ∼2 in G 735 and the occurrence of a short duration (≃400 s) flare in G 729 are presented. A study of the distribution of the ratio of the X-ray luminosity to the bolometric luminosity (_L_x/_L_Bol) for all the X-ray-observed flaring and non-flaring dwarf M stars shows that the _L_x/_L_Bol distribution of the flare stars is remarkably similar to that of the regular period RS CVn binaries but dissimilar to that of the non-flaring dwarf M stars. A strong correlation is found between _L_x and _L_Bol for the flare stars and regular period RS CVn binaries described by |$L_\text x=10^{-3.23\pm0.22}L_\text{Bol}$|. The correlation between _L_x and the luminosities of chromospheric and transition region lines in flare stars is also discussed. No compelling evidence is found for a dependence of _L_x/_L_Bol (or _L_x) on the rotation velocity or rotation period for the limited sample of flare stars with available data. Finally similarities between the X-ray spectra of the flare stars and those of the RS CVn binaries are discussed.
© 1986 Royal Astronomical Society. Provided by the NASA Astrophysics Data System
Citations
Views
Altmetric
Metrics
Total Views 156
155 Pageviews
1 PDF Downloads
Since 2/1/2017
| Month: | Total Views: |
|---|---|
| February 2017 | 1 |
| December 2017 | 3 |
| August 2020 | 1 |
| October 2020 | 1 |
| November 2020 | 3 |
| December 2020 | 3 |
| March 2021 | 6 |
| April 2021 | 4 |
| May 2021 | 8 |
| July 2021 | 1 |
| September 2021 | 5 |
| October 2021 | 2 |
| November 2021 | 2 |
| December 2021 | 5 |
| January 2022 | 6 |
| February 2022 | 8 |
| March 2022 | 3 |
| April 2022 | 4 |
| July 2022 | 8 |
| August 2022 | 7 |
| September 2022 | 3 |
| October 2022 | 3 |
| November 2022 | 5 |
| December 2022 | 5 |
| January 2023 | 2 |
| February 2023 | 4 |
| March 2023 | 2 |
| April 2023 | 5 |
| June 2023 | 5 |
| July 2023 | 2 |
| August 2023 | 4 |
| September 2023 | 3 |
| November 2023 | 5 |
| December 2023 | 4 |
| January 2024 | 1 |
| February 2024 | 4 |
| April 2024 | 1 |
| May 2024 | 3 |
| June 2024 | 3 |
| July 2024 | 5 |
| August 2024 | 3 |
| September 2024 | 3 |
Citations
51 Web of Science
×
Email alerts
Citing articles via
More from Oxford Academic
- About Monthly Notices of the Royal Astronomical Society
- Editorial Board
- Author Guidelines
- Contact Us
- YouTube
- Purchase
- Recommend to your Library
- Advertising and Corporate Services
- Journals Career Network
Online ISSN 1365-2966
Print ISSN 0035-8711
Copyright © 2024 The Royal Astronomical Society
Copyright © 2024 Oxford University Press