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H ii Regions as Probes of Galaxy Evolution and the Properties of Massive Stars

Donald R. Garnett
Publications of the Astronomical Society of the Pacific
Vol. 105, No. 691 (1993 September), pp. 996-998
Stable URL: http://www.jstor.org/stable/40680151
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
H ii Regions as Probes of Galaxy Evolution and the Properties of Massive Stars
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Abstract

The use of H II regions as probes to study the chemical evolution of galaxies and the spectral properties of hot, massive stars is reviewed. The observable parameters for this task are the physical conditions, elemental abundances, and ionization balance in the ionized gas. Some outstanding uncertainties in the determination of these parameters and some approaches to remedy or circumvent the problems are discussed.

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