COS-GTO: Sampling the Local ISM with hot white dwarfs

Details COS-GTO: Sampling the Local ISM with hot white dwarfs COS-GTO: Sampling the Local ISM with hot white dwarfs

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11526g&link_type=abstract

HST Proposal ID #11526. Cycle 17

Physics

Scientific paper

We shall use hot white dwarf stars located within 150pc of the Sun to probe the absorption properties of the interstellar gas associated with the local cavity. There is still much debate concerning the ionization state of the local gas, since previously detected highly ionized lines {such as CIV and SiIV} could be associated with the circumstellar environments of hot white dwarfs. By using a priori knowledge of the velocity structure of the interstellar sight-lines to these targets {gained from high spectral resolution ground-based observations} in conjunction with the UV absorption data gained with HST-COS, we shall be able to better determine both the physical and chemical state of the numerous diffuse interstellar clouds present within the local cavity.;

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