We review the use of emission lines for understanding galaxy evolution, focusing on
excitation source, metallicity, ionization parameter, ISM pressure, and electron density. We …

Observational and theoretical studies of extragalactic H II regions are reviewed. The
physical properties of H II regions, their distribution in galaxies, and extinction are discussed …

We investigate the effect of metallicity calibrations, AGN classification, and aperture covering
fraction on the local mass-metallicity (MZ) relation using 27,730 star-forming galaxies from …

Radio and optical spectroscopy have been combined to measure chemical abundances in a
large and representative sample of galactic H ii regions covering a wide range in …

We present the results of low-dispersion optical spectroscopy of 186 H II regions spanning a
range of radius in 13 spiral galaxies. Abundances for several elements (oxygen, nitrogen …

We present a new grid of ionizing fluxes for O and Wolf—Rayet (W—R) stars for use with
evolutionary synthesis codes and single-star H ii region analyses. A total of 230 expanding …

Our purpose in writing this book is to show how physics has been applied to developing our
current understanding of the phase structure, physical condi tions, chemical makeup and …

Primordial nucleosynthesis - A critical comparison of theory and observation ADS Classic is
now deprecated. It will be completely retired in October 2019. This page will automatically …

AAT/IPCS spectra have been obtained for a part of the nuclear region and for four H ii
regions in the SABc galaxy NGC 2997, and for the nucleus and five H ii regions in the …

With the aid of an extensive homogeneous grid of theoretical photoionization models (Evans
and Dopita, 1985), a multiline fit to the observed emission-line spectral sequence of …