Probing Tidal Debris in M 81

Details Probing Tidal Debris in M 81 Probing Tidal Debris in M 81

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5888r&link_type=abstract

HST Proposal ID #5888

Computer Science

Hst Proposal Id #5888 Interstellar Medium

Scientific paper

We propose GHRS G270M spectral observations of the bright nucleus of M 81 in order to probe the extent of the tidal debris giving rise to the complex Mg II absorption toward the bright supernova SN 1993J. We have found no evidence of this material in Na I spectra obtained toward M 81 with the KPNO coud'e feed earlier this year. Our Mg II observations will provide a more sensitive search for this gas and will sample material within which Na I cannot exist. In addition, these observations provide a rare opportunity to probe the entire extent of the Milky Way halo in two sightlines separated by only 2.6' on the sky.

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