On the apparent positions of T Tauri stars in the H-R diagram

Details On the apparent positions of T Tauri stars in the H-R diagram On the apparent positions of T Tauri stars in the H-R diagram

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349..197k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Jan. 20, 1990, p. 197-207. Research supported by the Smithsonian Insti

Astronomy and Astrophysics

Astrophysics

107

Hertzsprung-Russell Diagram, Stellar Evolution, T Tauri Stars, Accretion Disks, Stellar Luminosity, Stellar Mass Accretion, Stellar Models

Scientific paper

The spread in apparent luminosities of T Tauri stars caused by occultation and emission from protostellar disks is investigated. A random distribution of disk inclination angles, coupled with a plausible range of accretion rates, introduces a significant scatter in apparent luminosities for intrinsically identical stars. The observed dispersion of luminosities for K7-M1 Hayashi track stars thought to have disks in Taurus-Auriga is similar to predictions of the simple accretion disk model, which suggets that age determinations form many pre-main-sequence stars are uncertain. The results also suggest that Stahler's 'birthline' for convective track pre-main-sequence stars may be located at slightly lower luminosities than previously thought.

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