Rapid, low-level X-ray variability in active late-type dwarfs

Details Rapid, low-level X-ray variability in active late-type dwarfs Rapid, low-level X-ray variability in active late-type dwarfs

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apjs...65..273a&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 65, Oct. 1987, p. 273-305. Research supported by the Ministero de

Astronomy and Astrophysics

Astrophysics

57

Dwarf Stars, Flare Stars, Late Stars, Radiant Flux Density, Stellar Spectrophotometry, X Ray Spectra, Light Curve, Solar Corona, Spectrum Analysis, Variable Stars

Scientific paper

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.

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