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Flares at the Cool End of the M Dwarfs: The Case of LHS 2065
- Source :
- The Astronomical Journal. 121:2758-2760
- Publication Year :
- 2001
- Publisher :
- American Astronomical Society, 2001.
-
Abstract
- LHS 2065 is an M9 very low mass star at a distance of 8.5 pc. It was known to have Hα emission, but no other emission lines had been seen before. We observed it on 1998 December 12 and found a rich emission spectrum (He I, Na D, and Balmer series). Additional spectra were obtained after 1 hr, 2 hr, and 1 day. They showed progressively weaker emission lines. Using our data and a compilation of the literature, we find that, while strong flares in LHS 2065 are rare (their recurrence rate is ≤0.03 hr-1), weak flares may be common (about 0.5 hr-1). Our observations add to the growing evidence that many, if not all, of the coolest M dwarfs have flare activity.
Details
- ISSN :
- 00046256
- Volume :
- 121
- Database :
- OpenAIRE
- Journal :
- The Astronomical Journal
- Accession number :
- edsair.doi...........1d5615ebfdde7be8108f58d2f55f9fb1