Volume 382, Number 2, FebruaryI 2002
|Page(s)||573 - 582|
|Published online||15 February 2002|
The molecular disk surrounding the protostellar binary L1551 IRS5
ESA Astrophysics Mission Division, Research and Scientific Support Department, ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands
2 Centre for Astrophysics and Space Science at Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden
3 Unit for Space Sciences and Astronomy, Physics Department, University of Kent, Canterbury CT2 7NR, UK
Corresponding author: C. V. M. Fridlund, Malcolm.Fridlund@esa.int
Accepted: 23 October 2001
The inner three arcminutes surrounding the Class 0/1 binary protostar L1551 IRS5 have been observed using the transitions of the , , 12CO and 13CO molecular species. Since the line core of is self reversed over a substantial part of our map, observations of isotopomers such as are required in order to estimate the mass of the molecular gas in the immediate vicinity of IRS5. Our observations demonstrate the presence of a large (~7000 AU radius) dense, possibly rotating, molecular disk with a mass of a few oriented perpendicular to the major axis of an extended molecular outflow. The disk is surrounded by an envelope with a radius of ~10 000 AU that contains two massive (each ~1 ) clumps. One of these features appears to be kinematically disconnected from both the disk and the molecular outflow.
Key words: ISM: clouds / ISM: individual objects: L1551 / ISM: jets and outflows / stars: formation / stars: pre-main sequence / radio lines: ISM
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.