116 citations · 316 across the 9 of their papers we have counts for
9 papers
Carbon and oxygen abundances from recombination lines in low-metallicity star-forming galaxies. Implications for chemical evolution
C. Esteban, J. García-Rojas, L. Carigi +4
We present deep echelle spectrophotometry of the brightest emission-line knots of the star-forming galaxies He 2-10, Mkn 1271, NGC 3125, NGC 5408, POX 4, SDSS J1253-0312, Tol 1457-…
NGC 2579 and the carbon and oxygen abundance gradients beyond the solar circle
C. Esteban, L. Carigi, M. V. F. Copetti +4
We present deep echelle spectrophotometry of the Galactic HII region NGC 2579. The data have been taken with the Very Large Telescope Ultraviolet-Visual Echelle Spectrograph in the…
Measurements of 4He in Metal-Poor Extragalactic HII Regions: the Primordial Helium Abundance and the Delta Y / Delta O Ratio
M. Peimbert, A. Peimbert, L. Carigi +1
We present a review on the determination of the primordial helium abundance Yp, based on the study of hydrogen and helium recombination lines in extragalactic HII regions. We also…
Chemical consequences of low star formation rates: stochastically sampling the IMF
L. Carigi, X. Hernandez
When estimating the abundances which result from a given star formation event, it is customary to treat the IMF as a series of weight factors to be applied to the stellar yields, a…
Enrichment of the Intergalactic Medium by the Milky Way Subgroup
Leticia Carigi
I study the effect of the galaxies of the Milky Way subgroup on the chemical enrichment of the diffuse gas within the Local Group. The preferred model predicts that the present-day…
Photometric Constraints on Chemical Evolution Models of Irregular Galaxies
Leticia Carigi, Gustavo Bruzual
Photometric properties of stellar populations that evolve according to chemical evolution models developed by Carigi, Colin, & Peimbert (1999) and Carigi & Peimbert (2001) are expl…
Some Implications of Galactic Abundance Gradients Derived from H II Regions and Planetary Nebulae
Manuel Peimbert, Leticia Carigi
By comparing observed abundance gradients with those predicted by a chemodynamical model of the Galaxy the following results are obtained: there is a defficiency of O/H poor PNe in…
Dark Matter and the Chemical Evolution of Irregular Galaxies
L. Carigi, P. Colin, M. Peimbert
We present three types of chemical evolution models for irregular galaxies: closed-box with continuous star formation rates (SFRs), closed-box with bursting SFRs, and O-rich outflo…
Chemical Evolution of Irregular and Blue Compact Galaxies
L. Carigi, P. Colin, M. Peimbert +1
We discuss the chemical evolution of metal poor galaxies and conclude that their oxygen deficiency is not due to: the production of black holes by massive stars or a varying slope…