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Title:
Spectral energy distributions of T Tauri stars - Disk flaring and limits on accretion
Authors:
Kenyon, S. J.; Hartmann, L.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 323, Dec. 15, 1987, p. 714-733. (ApJ Homepage)
Publication Date:
12/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Photography, Energy Distribution, Stellar Mass Accretion, Stellar Spectra, T Tauri Stars, Absorption Spectra, Emission Spectra, Infrared Spectra, Stellar Flares, Stellar Models, Stellar Radiation
DOI:
10.1086/165866
Bibliographic Code:
1987ApJ...323..714K

Abstract

The authors analyze spectral energy distributions of T Tauri stars (TTS) to place limits on disk accretion in this early phase of stellar evolution. The results reinforce the conclusion of Adams, Lada, and Shu that much of the infrared excess emission arises from reprocessing of stellar radiation by a dusty circumstellar disk. Observational constraints on disk geometries and disk masses are derived. The relative importance of accretion and solar-type chromospheric activity in T Tauri stars is assessed. The present analysis indicates that disk accretion in the T Tauri phase does not modify stellar evolution significantly and that the angular momentum of accreted material can be lost in a stellar wind.

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