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A 45 AU radius source around L1551-IRS 5: a possible accretion disk

Published online by Cambridge University Press:  03 August 2017

J. Keene  and
C. R. Masson
J. Keene
Affiliation:
California Institute of Technology, 320-47, Pasadena, CA, 91125, USA
C. R. Masson
Affiliation:
California Institute of Technology, 320-47, Pasadena, CA, 91125, USA Center for Astrophysics, 60 Garden Street, Cambridge, MA, 02138, USA

Abstract

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Our interferometric and single-dish observations of the continuum emission from L1551-IRS 5 show that, at millimeter wavelengths, there are two distinct components to the source, an envelope with a radius ≥ 2000 AU, and a compact core with a radius ≤ 64 AU. The compact core has a large optical depth, indicating a high column density (∼ 1000 g cm—2). By modeling the temperature in the region of the compact core, we show that its size must lie in the range 45 ± 20 AU. The compact core is most plausibly identified with an accretion, or preplanetary, disk around the star, although the present observations do not have sufficient angular resolution to rule out other structures.

Type
Early Stages of Stellar Evolution
Information
Symposium - International Astronomical Union , Volume 147: Fragmentation of Molecular Clouds and Star Formation , 1991 , pp. 361 - 372
Copyright
Copyright © Kluwer 1991 

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