Proxima Centauri -- the nearest planet host observed simultaneously with AstroSat, Chandra and HST

TL;DR

This study presents simultaneous multi-wavelength observations of Proxima Centauri using AstroSat, Chandra, and HST to analyze its stellar activity and implications for the habitability of its Earth-like planet.

Contribution

It provides the first coordinated multi-instrument observation of Proxima Centauri, offering detailed insights into its coronal activity and high-energy radiation environment.

Findings

Proxima Centauri exhibits variable activity states.

Coronal temperatures and emission measures were characterized.

Results are compared with previous observations to assess activity changes.

Abstract

Our nearest stellar neighbour, Proxima Centauri, is a low mass star with spectral typedM5.5 and hosting an Earth-like planet orbiting within its habitable zone. However, the habitability of the planet depends on the high-energy radiation of the chromo-spheric and coronal activity of the host star. We report the Astrosat, Chandra and HST observation of Proxima Centauri carried out as part of the multi-wavelength simultaneous observational campaign. Using the soft X-ray data, we probe the different activity states of the star. We investigate the coronal temperatures, emission measures and abundance. Finally, we compare our results with earlier observations of Proxima Centauri