The Open UniversitySkip to content

The molecular disk surrounding the protostellar binary L1551 IRS5

Fridlund, C. V. M.; Bergman, P.; White, G. J.; Pilbratt, G. L. and Tauber, J. A. (2002). The molecular disk surrounding the protostellar binary L1551 IRS5. Astronomy & Astrophysics, 382(2) pp. 573–582.

Full text available as:
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (695kB)
DOI (Digital Object Identifier) Link:
Google Scholar: Look up in Google Scholar


The inner three arcminutes surrounding the Class 0/1 binary protostar L1551 IRS5 have been observed using the J=1→0 transitions of the HCO+, H13CO+, 12CO and 13CO molecular species. Since the line core of HCO+ is self reversed over a substantial part of our map, observations of isotopomers such as H13CO+ 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 M 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 M) clumps. One of these features appears to be kinematically disconnected from both the disk and the molecular outflow.

Item Type: Journal Item
Copyright Holders: 2002 ESO
ISSN: 1432-0746
Keywords: clouds; L1551; jets; outflows; stellar formation; pre-main sequence; radio lines
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Related URLs:
Item ID: 6695
Depositing User: G. J. White
Date Deposited: 06 Feb 2007
Last Modified: 08 Dec 2018 12:40
Share this page:


Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU