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A Brγ Probe of Disk Accretion in T Tauri Stars and Embedded Young Stellar Objects

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© 1998. The American Astronomical Society. All rights reserved. Printed in U.S.A.
, , Citation James Muzerolle et al 1998 AJ 116 2965 DOI 10.1086/300636

1538-3881/116/6/2965

Abstract

We report on observations of Paβ and Brγ for a sample of classical T Tauri stars in Taurus and find a tight correlation between the emission-line luminosities and the accretion luminosity as measured from the hot continuum excess. We use the Brγ luminosity correlation to calculate accretion luminosities in highly reddened young stars with existing line measurements. The distribution of accretion luminosities is similar in Taurus and Ophiuchus Class II sources. For the deeply embedded Class I objects, the accretion luminosities are in general less than the bolometric luminosities, which implies that the disk accretion rates are significantly lower than the envelope infall rates. We find that the central sources of many Class I objects are quite similar to their Class II counterparts.

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10.1086/300636