Mathematics – Logic
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9525l&link_type=abstract
HST Proposal ID #9525
Mathematics
Logic
Hst Proposal Id #9525 Ism And Circumstellar
Scientific paper
Analysis of high resolution archive spectra for at least 24 lines of sight to stars located within 100 pc, together with 41 lines of sight previously analyzed, will allow us to develop a comprehensive model for the local ISM describing the structure and physical properties of the important warm clouds. As Stage I of this program, we have already analyzed the STIS E230H and GHRS Echelle-B spectra of the Mg II and Fe II lines for these 24 lines of sight to determine the kinematics and morphological structure of these clouds. The requested archive investigation is Stage II of our program in which we will analyze the interstellar absorption lines of H I, D I, C II, N I, O I, Mg I, Al II, Si II, and Mn II in high resolution spectra for these lines of sight to determine the temperature, turbulent velocity, ionization, chemical abundances, and depletions in these clouds. When available we will include analyses of FUSE and optical spectra of additional ions for these same lines of sight. Our objective is to determine the physical properties {and their spatial variations} of the warm gas in these clouds for comparison with theoretical models based on the radiation field in the LISM. This comprehensive study of the warm gas in the LISM will become the guide for understanding physical processes in the ISM elsewhere in the disk of the Galaxy. This work will be a major part of Seth Redfield's PhD thesis.
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