Coronae of an active fast rotator FR Cnc
Abstract
We present the first detailed X-ray study and simultaneous optical observations of the active fast rotating star FR Cnc. The X-ray spectra are found to be explained by two-temperature plasma model with temperature of cool and hot components of 0.34 and 1.1 keV, respectively. The X-ray light curve in the 0.5 -- 2.0 keV energy band is found to be rotationally modulated with the degree of rotational modulation of ~17%. We have also found that the X-ray light curve is anti-correlated with the optical light and colour curves in the sense that maximum X-ray light corresponds to minimum optical light and cooler region on the surface of FR Cnc. The X-ray luminosity of FR Cnc is found to be almost consistent in the last 30 years with an average value of 4.85x10^{29} erg/s in the 0.5 -- 2.0 keV energy band.
Cite
@article{arxiv.2012.15062,
title = {Coronae of an active fast rotator FR Cnc},
author = {Jeewan C. Pandey and Gurpreet Singh and Subhajeet Karmakar and Arti Joshi and I. S. Savanov and S. A. Naroenkov and M. A. Nalivkin},
journal= {arXiv preprint arXiv:2012.15062},
year = {2021}
}
Comments
Accepted for publication in Journal of Astrophysics and Astronomy