On X-ray Variability in Active Binary Stars
Astrophysics
2009-10-31 v1
Abstract
We compare the count-rates of active binaries observed by Einstein and ROSAT. We find significant evidence for short-term variability (approx 0.32) and marginal evidence for a larger variability at longer timescales (approx 0.38). Modeling this excess as cyclic variability, we place an upper limit on the relative amplitude of the cyclic component (I_cyc/I_min < 4) for active binaries, significantly less than the variations seen in the Solar X-ray output over the Solar cycle.
Keywords
Cite
@article{arxiv.astro-ph/9905109,
title = {On X-ray Variability in Active Binary Stars},
author = {Vinay Kashyap and Jeremy Drake},
journal= {arXiv preprint arXiv:astro-ph/9905109},
year = {2009}
}
Comments
27 pages postscript, 5 embedded figures. accepted for publication in ApJ