The High-Energy Radiation Environment Around a 10 Gyr M Dwarf: Habitable at Last?

@article{France2020TheHR,
  title={The High-Energy Radiation Environment Around a 10 Gyr M Dwarf: Habitable at Last?},
  author={K. France and Girish M. Duvvuri and H. Egan and T. Koskinen and David J. Wilson and A. Youngblood and C. Froning and Alexander Brown and J. Alvarado-G{\'o}mez and Z. Berta-Thompson and J. Drake and C. Garraffo and L. Kaltenegger and A. Kowalski and J. Linsky and R. Loyd and P. Mauas and Y. Miguel and J. S. Pineda and S. Rugheimer and P. Schneider and F. Tian and M. Vieytes},
  journal={arXiv: Earth and Planetary Astrophysics},
  year={2020}
}
High levels of X-ray and UV activity on young M dwarfs may drive rapid atmospheric escape on temperate, terrestrial planets orbiting within the liquid water habitable zone. However, secondary atmospheres on planets orbiting older, less active M dwarfs may be stable and present more promising candidates for biomarker searches. We present new HST and Chandra observations of Barnard's Star (GJ 699), a 10 Gyr old M3.5 dwarf, acquired as part of the Mega-MUSCLES program. Despite the old age and long… Expand

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