| Name: Ananya Rai |
| Affiliation: IIT KANPUR |
| Conference ID: ASI2026_652 |
| Title: Effect of Stellar Flares on the evolution of exoplanet atmosphere around G, K, and M-type star |
| Abstract Type: Poster |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: Ananya rai(IIT Kanpur,Kanpur-208016,INDIA), Gopal hazra(T Kanpur,Kanpur-208016,INDIA), Subhadip Pal(T Kanpur,Kanpur-208016,INDIA), Arnob Ghosh(T Kanpur,Kanpur-208016,INDIA) |
| Abstract: Atmospheric escape is a fundamental process governing the long-term evolution and potential habitability of exoplanets, driven primarily by the high-energy X-ray and extreme ultraviolet (XUV) radiation from their host stars. In this study, we investigate the role of stellar flares in enhancing atmospheric escape from exoplanets. We employ a one-dimensional, self-consistent hydrodynamic escape model that traditionally assumes a constant stellar XUV luminosity. To estimate the mass-loss rate over stellar age, we perform multiple simulations using XUV fluxes representative of both quiescent and flaring stellar states. Our initial results focus on a hot Jupiter orbiting M-dwarf, K-type, and G-type host stars. We consider two cases: one using only the stellar spectral energy distribution (SED), and another including the effects of secondary ionization. We find that stellar flares significantly enhance atmospheric escape, with the strongest effect observed for M-dwarf hosts, followed by K-type and G-type stars, in both cases. Furthermore, the inclusion of secondary ionization leads to a reduction in the cumulative mass loss over stellar age compared to the SED-only case. This reduction is most pronounced for M-dwarf hosts, followed by K-type and G-type stars, a trend that is currently under investigation. Overall, our results highlight the crucial role of stellar flares in shaping planetary atmospheric evolution and demonstrate that incorporating more realistic physics, such as detailed SED and secondary ionization processes, leads to more accurate estimates of atmospheric mass loss rate. |
