214 citations
- L. Sodré3 profiles19 · h 25
- A. Ederoclite17 · h 20
- A. Marín-Franch15 · h 18
- J. Varela3 profiles15 · h 27
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- C. López-Sanjuan2 profiles12 · h 28
- S. Bonoli11 · h 15
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10 papers · 2 filters
IPHAS and the symbiotic stars. I. Selection method and first discoveries
R. L. M. Corradi, E. R. Rodríguez-Flores, A. Mampaso +7
The study of symbiotic stars is essential to understand important aspects of stellar evolution in interacting binaries. Their observed population in the Galaxy is however poorly kn…
A multispectral view of the periodic events in eta Carinae
A. Damineli, D. J. Hillier, M. F. Corcoran +13
A full description of the 5.5-yr low excitation events in Eta Carinae is presented. We show that they are not as simple and brief as previously thought, but a combination of two co…
The dependence of the viscosity-parameter on the disk scale height profile
Cesar Meirelles Filho, Nelson Leister
It is shown that the height scale for accretion disks is a constant whenever hydrostatic equilibrium and sub-sonic turbulence regime hold in the disk. In order to have a variable h…
Bayesian posterior classification of planetary nebulae according to the Peimbert types
C. Quireza, H. J. Rocha-Pinto, W. J. Maciel
In this paper we present a re-analysis of the criteria used to characterize the Peimbert classes I, IIa, IIb, III and IV, through a statistical study of a large sample of planetary…
Ages of Elliptical Galaxies: Single versus Multi Population Interpretation
T. P. Idiart, J. Silk, J. A. de Freitas Pacheco
New calibrations of spectrophotometric indices of elliptical galaxies as functions of spectrophotometric indices are presented, permitting estimates of mean stellar population ages…
Chemical evolution of the Small Magellanic Cloud based on planetary nebulae
T. P. Idiart, W. J. Maciel, R. D. D. Costa
We investigate the chemical evolution of the Small Magellanic Cloud (SMC) based on abundance data of planetary nebulae (PNe). The main goal is to investigate the time evolution of…