Spatially resolved optical and near-infrared spectroscopy of I ZW 18

Details Spatially resolved optical and near-infrared spectroscopy of I ZW 18 Spatially resolved optical and near-infrared spectroscopy of I ZW 18

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...411..655s&link_type=abstract

Astrophysical Journal - Part 1 (ISSN 0004-637X), vol. 411, no. 2, p. 655-666.

Astronomy and Astrophysics

Astrophysics

236

Astronomical Spectroscopy, H Ii Regions, Infrared Spectroscopy, Irregular Galaxies, Visible Spectrum, Abundance, Emission Spectra, Line Spectra, Near Infrared Radiation

Scientific paper

Long-slit optical and near-IR spectroscopy are presented for the bright NW and faint SE components of the oxygen-poor H II galaxy I Zw 18, yielding physical conditions and O, N, S, and He abundances for these components. All of the elemental abundances for the two components of I Zw 18 are equal (within errors), thereby placing constraints on evolutionary theories for this system.

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