139 citations
- Universidad Nacional de La PlataAR9 papers
- Consejo Nacional de Investigaciones Científicas y TécnicasAR6 papers
- Universidad de Buenos AiresAR3 papers
- Gemini North ObservatoryUS2 papers
- Instituto de Astrofísica de CanariasES2 papers
- The University of Texas at AustinUS2 papers
- Universidade Federal do Rio Grande do SulBR2 papers
- Astronomical ObservatoryRS1 paper
- Astronomical Observatory of CapodimonteIT1 paper
- Beijing Normal UniversityCN1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
- Centro Científico Tecnológico - TucumánAR1 paper
9 papers
WMAP 5-year constraints on time variation of and in a detailed recombination scenario
Claudia G. Scóccola, Susana. J. Landau, Hector Vucetich
We study the role of fundamental constants in an updated recombination scenario. We focus on the time variation of the fine structure constant, and the electron mass in the early U…
Modeling He-rich subdwarfs through the hot-flasher Scenario
M. M. Miller Bertolami, L. G. Althaus, K. Unglaub +1
We present 1D numerical simulations aimed at studying the hot-flasher scenario for the formation of He-rich subdwarf stars. Sequences were calculated for a wide range of metallicit…
Galaxy populations in the Antlia cluster. I. Photometric properties of early-type galaxies
A. V. Smith Castelli, L. P. Bassino, T. Richtler +3
We present the first colour-magnitude relation (CMR) of early-type galaxies in the central region of the Antlia cluster, obtained from CCD wide-field photometry in the Washington p…
Time variation of the electron mass in the early universe and the Barrow-Magueijo model
Claudia G. Scóccola, Mercedes E. Mosquera, Susana J. Landau +1
We put limits on the time variation of the electron mass in the early universe using observational primordial abundances of D, He4 and Li7, recent data from the Cosmic Microwave Ba…
The pulsation modes of the pre-white dwarf PG 1159-035
J. E. S. Costa, S. O. Kepler, D. E. Winget +74
PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…
White Dwarf Luminosity and Mass Functions from Sloan Digital Sky Survey Spectra
Steven DeGennaro, Ted von Hippel, D. E. Winget +4
We present the first phase in our ongoing work to use Sloan Digital Sky Survey (SDSS) data to create separate white dwarf (WD) luminosity functions for two or more different mass r…