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From Infall to Rotation Around Young Stellar Objects

Hogerheijde, Michiel R. and Boogert, Adwin C. A. and van Dishoeck, Ewine F. and Blake, Geoffrey A. (2003) From Infall to Rotation Around Young Stellar Objects. In: The Origin of Stars and Planets: The VLT View. Springer , Berlin, pp. 53-58. ISBN 978-3-540-43541-9.

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We present evidence of a short-lived, transitional stage between the fully embedded and optically visible stages of low-mass star formation. This stage is characterized by a large (2000 AU radius) disk with close-to Keplerian motions, but with a significant inward component to the velocity field. Millimeter-interferometric observations of HCO^+ J=1-0 and 3-2 first identified this structure around the embedded object L1489 IRS, with inward motions present on scales of several hundred AU. Subsequent R≈25,000 M-band spectroscopy showed that the inward motions extend to within 0.1 AU from the star. We conclude that angular-momentum transfer is crucial in determining the final density distribution in the disk and the initial conditions for planet formation.

Item Type:Book Section
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URLURL TypeDescription
van Dishoeck, Ewine F.0000-0001-7591-1907
Blake, Geoffrey A.0000-0003-0787-1610
Additional Information:© 2002 Springer-Verlag Berlin Heidelberg. First Online: 15 October 2003.
Subject Keywords:Planet Formation; Tauri Star; Circumstellar Disk; Young Stellar Object; Cloud Core
Record Number:CaltechAUTHORS:20190507-131843305
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95304
Deposited By: Tony Diaz
Deposited On:07 May 2019 20:47
Last Modified:03 Oct 2019 21:12

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