Surface activity of rapidly rotating stars from simultaneous X-ray and UV observations with AstroSat
Abstract
Our study focuses on analysing the coronal, transition and chromospheric activity of four rapidly rotating stars located within 50 pc in the solar neighbourhood. We have used the multi-wavelength capabilities of AstroSat, to investigate the outer atmospheres of AB Dor, BO Mic, DG CVn and GJ 3331. These stars, classified as M and K type active stars, are known for their short rotation periods, leading to increased surface magnetic activity. Our soft X-ray observations provide the coronal properties such as emission measures, temperatures and elemental coronal abundances. We report the detection of X-ray flares from AB Dor, BO Mic, and DG CVn, while UV light curves reveal flares in both BO Mic and DG CVn.
Keywords
Cite
@article{arxiv.2309.11286,
title = {Surface activity of rapidly rotating stars from simultaneous X-ray and UV observations with AstroSat},
author = {Lalitha Sairam and Utkarsh Pathak and Kulinder Pal Singh},
journal= {arXiv preprint arXiv:2309.11286},
year = {2023}
}
Comments
Accepted for publication in Journal of Astrophysics and Astronomy