9 citations · 26 across the 6 of their papers we have counts for
4 papers · 2 filters
VLT Echelle Spectrophotometry of the Planetary Nebula NGC 5307 and Temperature Variations
M. T. Ruiz, A. Peimbert, M. Peimbert
Echelle spectrophotometry of the planetary nebula NGC 5307 is presented. The data consists of VLT UVES observations in the 3100 to 10360 A range. Electron temperatures and densitie…
The effect of collisional enhancement of Balmer lines on the determination of the primordial helium abundance
V. Luridiana, A. Peimbert, M. Peimbert +1
This paper describes a new determination of the primordial helium abundance (Y_P), based on the abundance analysis of five metal-poor extragalactic HII regions. For three regions o…
Fine Scale Temperature Fluctuations in the the Orion Nebula and the t^2 Problem
C. R. O'Dell, M. Peimbert, A. Peimbert
We present a high spatial resolution map of the columnar electron temperature (Tc) of a region to the south west of the Trapezium in the Orion Nebula. This map was derived from Hub…
Photoionization Models of Metal-poor Extragalactic HII Regions and the Primordial Helium Abundance
V. Luridiana, A. Peimbert, M. Peimbert
We discuss the effects of collisional enhancement of Balmer lines on the determination of the primordial helium abundance. To this aim, we present a photoionization model of the me…