Spectroscopy of outlying H II regions in spiral galaxies: Abundances and radial gradients

Authors
van Zee, L Salzer, JJ Haynes, MP O'Donoghue, AA Balonek, TJ
Citation
L. Van Zee et al., Spectroscopy of outlying H II regions in spiral galaxies: Abundances and radial gradients, ASTRONOM J, 116(6), 1998, pp. 2805-2833
Citations number
61
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMICAL JOURNAL
ISSN journal
00046256 → ACNP
Volume
116
Issue
6
Year of publication
1998
Pages
2805 - 2833
Database
ISI
SICI code
0004-6256(199812)116:6<2805:SOOHIR>2.0.ZU;2-E
Abstract
We present the results of low-dispersion optical spectroscopy of 186 H II r egions spanning a range of radius in 13 spiral galaxies. Abundances for sev eral elements (oxygen, nitrogen, neon, sulfur, and argon) were determined f or 185 of the H II regions. As expected, low metallicities were found for t he outlying H II regions of these spiral galaxies. Radial abundance gradien ts were derived for the II primary galaxies; similar to results for other s piral galaxies, the derived abundance gradients are typically -0.04 to -0.0 7 dex kpc(-1).