664 citations · 2k across the 51 of their papers we have counts for
6 papers · 1 filter
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…
Physical limits to the validity of synthesis models: The Lowest Luminosity Limit
M. Cervino, V. Luridiana
(abriged) In this paper we establish a Lowest Luminosity Limit (LLL) for the use of synthesis codes. The limit is defined by the following statement: The total luminosity of the cl…
Physical conditions in NGC 6543 from ISO and HST data and the pitfalls of temperature maps
V. Luridiana, E. Perez, M. Cervino
We determine the physical conditions in NGC 6543, obtaining two different estimates of the electron temperature (T_e) and one estimate of the electron density (N_e). The electron t…
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…
Statistical Synthesis Models
M. Cervino, V. Luridiana
In this contribution we evaluate the minimal cluster mass for which the effects of an incomplete sampling of the Initial Mass Function (IMF) cannot be neglected. This minimal clust…
Physical conditions in the O++ zone from ISO and HST data. NGC 6543 revisited
V. Luridiana, E. Perez, M. Cervino
We revise the physical conditions in the O++ zone of the planetary nebula NGC 6543, obtaining two different estimates of the electron temperature (Te) and one estimate of the elect…