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- Title
Coronae of an active fast rotator FR Cnc.
- Authors
Pandey, Jeewan C.; Singh, Gurpreet; Karmakar, Subhajeet; Joshi, Arti; Savanov, I. S.; Naroenkov, S. A.; Nalivkin, M. A.
- 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 4.85 × 10 29 erg s - 1 in the 0.5–2.0 keV energy band.
- Publication
Journal of Astrophysics & Astronomy, 2021, Vol 42, Issue 2, p1
- ISSN
0250-6335
- Publication type
Article
- DOI
10.1007/s12036-021-09702-w