Spectroscopy of Outlying HII Regions in Spiral Galaxies: Abundances
and Radial Gradients
van Zee, L., Salzer, J.J., Haynes, M.P., O'Donoghue, A.A.,
& Balonek, T.J. 1998, AJ, 116, 2805
Abstract
We present the results of low dispersion optical spectroscopy of 186
HII regions spanning a range of radius in 13 spiral galaxies.
Abundances for several elements (oxygen, nitrogen, neon, sulfur, and argon)
were determined for 185 of the HII regions. As expected, low metallicities
were found for the outlying HII regions of these spiral galaxies.
Radial abundance gradients were derived for the 11 primary galaxies;
similar to results for other spiral galaxies, the derived abundance
gradients are typically -0.04 to -0.07 dex/kpc.
Composite color images
ADS abstract