Chandra X-Ray And HST/COS+STIS UV Spectroscopy Of Low-Mass Stars In The 9 Myr Old Tw Hya Association

Details Chandra X-Ray And HST/COS+STIS UV Spectroscopy Of Low-Mass Stars In The 9 Myr Old Tw Hya Association Chandra X-Ray And HST/COS+STIS UV Spectroscopy Of Low-Mass Stars In The 9 Myr Old Tw Hya Association

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12361b&link_type=abstract

HST Proposal ID #12361. Cycle 18

Physics

Scientific paper

The TW Hya association {age 9 Myr, distances 50 pc} is the nearest group of young stars with ages < 10 Myr and has stars with both actively accreting and debris disks. Consequently, this association offers special opportunities for studying protoplanetary system evolution. We propose to study 7 low mass TWA members using ACIS-S {4 fields; 75 ksec total} to obtain CCD resolution spectra and the COS+STIS spectrographs {18 HST orbits} to obtain medium resolution FUV and NUV spectra. Using these spectra we will study the temperature/EM distributions of the hot {log T = 4 - 7 K} plasma, examine the flows and turbulence in the hot plasma, and construct the full X-ray/EUV/FUV radiation fields to allow modeling their influence on protoplanetary system physics and chemistry.;

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