093279

With the launch of JWST we are finally in a position to determine if terrestrialexoplanets orbiting M dwarfs can develop and retain atmospheres in the presenceof their hosts harsh high-energy environments. Necessary to the interpretationof any planetary atmospheric data is the measured high-energy spectra from theUV to the X-ray of the M dwarf hosts. A JWST Cycle 2 Large program will surveynine rocky worlds orbiting nearby M dwarfs for the presence of atmospheres. OnlyHST can capture the critical UV information which we will supplement with X-rayobservations to provide a complete picture of the high-energy output of these Mdwarf hosts. We request 47 HST orbits to capture the UV spectra of these five Mdwarfs. [truncated! Please see actual data for full text]