Computer Science
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe...2m&link_type=abstract
"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere
Computer Science
Galaxies: Ism, Infrared: Galaxies, Infrared: Ism, Ism: Gas, Ism: Structure
Scientific paper
This paper covers the past decade of neutral gas measurements of spiral and dwarf irregular galaxies for which an explosion of measurements have been made. These measurements of neutral gas provide an important context for the interpretation of Spitzer Observations. The phases, properties and methods of measurement of the neutral ISM are presented. The quantity and distribution of neutral ISM in nearby galaxies is reviewed. The atomic component is present in all spirals and dwarf irregulars but the molecular gas fraction varies significantly being lowest in dwarf irregulars and low surface brightness galaxies. The distribution of molecular gas in spirals also varies with equal numbers of galaxies with central concentrations and holes. The effects of stars on the ISM, in particular their creation of photodissociation regions (PDRs), is reviewed. I note the over abundance of star formation rate studies in the literature and challenge this community to think ``green" and start researching the recycling aspect of ISM evolution by measuring all the sources and sinks of ISM in galaxies.
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