Characterizing The Near-UV Environment Of M Dwarfs

Details Characterizing The Near-UV Environment Of M Dwarfs Characterizing The Near-UV Environment Of M Dwarfs

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.1705w&link_type=abstract

American Astronomical Society Meeting 210, #17.05; Bulletin of the American Astronomical Society, Vol. 39, p.118

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the results of our HST snapshot survey with the ACS HRC PR200L prism, designed to measure the near-UV emission in a sample of nearby M dwarfs. 33 stars were observed, spanning the mass range from 0.1 - 0.6 solar masses (T 2200K - 4000K) where the UV energy distributions vary widely between active and inactive stars. The strength and distribution of this UV emission can have critical consequences for the atmospheres of attendant planets. These observations provide much-needed constraints on models of the habitability zone and the atmospheres of possible terrestrial planets orbiting M dwarf hosts, and will be used to refine the target selection for future space missions such as TPF. These NUV data will also be used in conjunction with existing optical, FUV and X-ray data to constrain a new generation of M dwarf atmospheric models, and to explore unanswered questions regarding the dynamo generation and magnetic heating in these low-mass stars.

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