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Evidences of protoplanetary disks in a selected sample of weak T Tauri stars

Published online by Cambridge University Press:  26 May 2016

Jane Gregorio-Hetem  and
Annibal Hetem Jr.
Jane Gregorio-Hetem
Affiliation:
Universidade de São Paulo (IAG/USP), Av. Miguel Stéfano 4200, 04301-904, São Paulo - Brazil; jane@orion.iagusp.usp.br
Annibal Hetem Jr.
Affiliation:
Universidade Paulista (UNIP/ICET), R. Dr. Bacelar 1212, 04026-002, São Paulo - Brazil; annibal.hetem@usa.net

Abstract

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A model with two dust components is used do explain the circumstellar structure of weak-T Tauri stars. The IR-excess was calculated and compared to spectroscopic criteria in order to classify the objects according an evolutionary sequence. About 46% of the sample correspond to young main sequence stars showing dust distribution consistent with a disrupted disk, that could be possibly caused by the formation of a planetary system.

Type
Part IV: Protoplanetary and β Pic disks
Information
Symposium - International Astronomical Union , Volume 202: Planetary Systems in the Universe – Observation, Formation and Evolution , 2004 , pp. 335 - 337
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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