The molecular disk surrounding the protostellar binary L1551 IRS5

Details The molecular disk surrounding the protostellar binary L1551 IRS5 The molecular disk surrounding the protostellar binary L1551 IRS5

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...382..573f&link_type=abstract

Astronomy and Astrophysics, v.382, p.573-582 (2002)

Astronomy and Astrophysics

Astrophysics

13

Ism: Clouds, Ism: Individual Objects: L1551, Ism: Jets And Outflows, Stars: Formation -\ Stars: Pre-Main Sequence, Radio Lines: Ism

Scientific paper

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 Msun 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 Msun) clumps. One of these features appears to be kinematically disconnected from both the disk and the molecular outflow.

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