Rapid, Low-Level X-Ray Variability in Active Late-Type Dwarfs
Abstract
The authors report the detection of rapid (a few hundred to >1000 s) quiescent variability, at ≥99% significance, in 24 of 34 Einstein IPC observations of 19 active K and M dwarfs. The IPC light curve and a plot of the variability analysis (using a new, statistically rigorous form of χ2 analysis) are given for each observation. The quiescent fluctuations appear not to fall on an extension of the N(S) curve for stellar X-ray flares. The authors discuss solar analogs and the recent suggestions that low-level flaring heats quiescent X-ray coronae.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- October 1987
- DOI:
- 10.1086/191225
- Bibcode:
- 1987ApJS...65..273A
- Keywords:
-
- Dwarf Stars;
- Flare Stars;
- Late Stars;
- Radiant Flux Density;
- Stellar Spectrophotometry;
- X Ray Spectra;
- Light Curve;
- Solar Corona;
- Spectrum Analysis;
- Variable Stars;
- Astrophysics;
- STARS: FLARE;
- STARS: LATE-TYPE;
- STARS: X-RAYS