ISO Spectroscopy of Ultracompact H II Regions: Element Abundance Gradient in the Galaxy

Details ISO Spectroscopy of Ultracompact H II Regions: Element Abundance Gradient in the Galaxy ISO Spectroscopy of Ultracompact H II Regions: Element Abundance Gradient in the Galaxy

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rmxac..12...41m&link_type=abstract

Ionized Gaseous Nebulae, a Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, Mexico City

Astronomy and Astrophysics

Astronomy

Galaxies: Evolution, Hydrodynamics, Ism: Structure, Stars: Formation, Supernova Remnants

Scientific paper

In order to study the element abundance distribution in the Galaxy, infrared spectra between 2.3 and 196 mu m were taken towards a sample of ultracompact H II regions using the two spectrometers (SWS and LWS) on board ISO. The sample spans a large range in galactocentric distance (0 to 20 kpc). The fine structure lines of O, N, Ne, Ar, S, C and Si are detected in most of the sources with some species (O, N, S, Ne, and Ar) present in different stages of ionization. From the measured line fluxes, the properties of the ionized gas can be precisely constrained.

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