Effect of stellar flares and coronal mass ejections on the atmospheric escape from hot Jupiters
- Author(s)
- Gopal Hazra, Aline A. Vidotto, S. Carolan, Carolina Villarreal D'Angelo, Ward Manchester
- Abstract
Spectral observations in the Ly-α line have shown that atmospheric escape is variable and for the exoplanet HD189733b, the atmospheric evaporation goes from undetected to enhanced evaporation in a 1.5 years interval. To understand the temporal variation in the atmospheric escape, we investigate the effect of flares, winds, and CMEs on the atmosphere of hot Jupiter HD189733b using 3D self-consistent radiation hydrodynamic simulations. We consider four cases: first, the quiescent phase including stellar wind; secondly, a flare; thirdly, a CME; and fourthly, a flare followed by a CME. We find that the flare alone increases the atmospheric escape rate by only 25%, while the CME leads to a factor of 4 increments, in comparison to the quiescent case. We also find that the flare alone cannot explain the observed high blue-shifted velocities seen in the Ly-α. The CME, however, leads to an increase in the velocity of escaping atmospheres, enhancing the blue-shifted transit depth.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Leiden University, Instituto de Astronomía Teórica y Experimental, University of Michigan, Trinity College London
- Volume
- 17
- Pages
- 148-154
- No. of pages
- 7
- DOI
- https://doi.org/10.1017/S1743921322004963
- Publication date
- 08-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/a1dbb7f5-dc15-4f8f-8cd1-a783fe27ad0a