5 papers · 1 filter
The Metallicity of Post-T Tauri Stars: A preliminary approach to the understanding of the metal enrichment of stars harboring planets
Ramiro de la Reza, Licio da Silva, Roberta Almeida +3
The metallicity of young low mass Post-T Tauri stars in coeval associations is practically unknown. This work is the beginning of a systematic measurement of these metallicities ba…
A Method to Search for Associations of Young Stars
Germano R. Quast, Carlos A. O. Torres, Claudio H. F. Melo +3
In the SACY (Search for Associations Containing Young-stars) project we try to identify associations of stars younger than the Local Association among HIPPARCOS and/or TYCHO-2 star…
The Great Austral Nearby Young Association
C. A. O. Torres, G. R. Quast, R. de la Reza +2
Observing ROSAT sources in an area covering 30% of the Southern Hemisphere, we found evidences for a great nearby association (GAYA), comprising the proposed associations of…
New Southern Groups
R. de la Reza, L. da Silva, E. Jilinski +2
Since the eighties we have begun, in Brazil, a search for Post-T Tauri stars. Here we describe the main steps of this research that resulted in the discovery of the nearby TW Hya a…
The PDS starburst galaxies
R. Coziol, C. A. O. Torres, G. R. Quast +2
(Abridged) We discuss the nature of the galaxies found in the Pico dos Dias Survey (PDS) for young stellar objects. The PDS galaxies were selected from the IRAS Point Source catalo…