189 citations · 611 across the 14 of their papers we have counts for
4 papers · 2 filters
Chemical Abundances of Extragalactic H II regions
Manuel Peimbert, Antonio Peimbert
The determination of the heavy element abundances from giant extragalactic H II regions is based on collisionally excited lines. We argue that in the presence of temperature variat…
Chemical Abundances of NGC 5461 and NGC 5471 derived from Echelle Spectrophotometry
V. Luridiana, C. Esteban, M. Peimbert +1
We present high resolution spectroscopic data of the two giant extragalactic H II regions NGC 5461 and NGC 5471 in M101, which have been obtained with the 2.1-m telescope of the Ob…
The Temperature Structure in Ionized Nebulae and the Chemical Evolution of Galaxies
Manuel Peimbert, Antonio Peimbert
A few results that indicate the presence of temperature variations in gaseous nebulae are reviewed. The evidence is based on: a) temperatures derived from different methods, and b)…
Temperature Variations and Abundance Determinations in Planetary Nebulae
Silvia Torres-Peimbert, Manuel Peimbert
It is argued that an important fraction of PNe present large temperature variations that are not due to observational errors nor to incomplete atomic physics. Seven possible causes…