Probing the Galactic Halo and Beyond with Young Supernovae

Details Probing the Galactic Halo and Beyond with Young Supernovae Probing the Galactic Halo and Beyond with Young Supernovae

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8694s&link_type=abstract

HST Proposal ID #8694

Computer Science

Hst Proposal Id #8694 Ism And Circumstellar Matter

Scientific paper

We propose a Target of Opportunity program to obtain STIS echelle spectra of a bright new supernova {V<= 14} to characterize the ionization state, gas-phase abundances, depletion on dust grains, metallicity, and gas kinematics in the Galactic halo, the ISM and halo of the SN's host galaxy, and, if the properties of the sightline are favorable, in the intervening intergalactic medium. The principal spectral region for this study is the far ultraviolet {wl <1700Angstrom}, which provides a comprehensive set of lines to study the hot, warm, and cool phases of the ISM. New core- collapse supernovae, with their strong, nearly featureless UV continua, provide outstanding opportunities to obtain high- quality absorption line spectra of the gas on the line of sight to the SN, but only if the observations are executed within 1 week of outburst. Our team has the experience and extensive ground-based support to promptly assess the suitability of each newly-discovered supernova for this program and to quickly provide all the necessary data to rapidly execute the observations. This proposal is a continuation of our Cycle 8 TOO program, for which we await a suitable target. Activator George Sonneborn office 301-286-3665 home 202-237-5832 pager 888-971-7164 email: george.sonneborn@gsfc.nasa.gov

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