A search for disks around massive young stellar objects

Details A search for disks around massive young stellar objects A search for disks around massive young stellar objects

2003-09-23

arxiv.org/abs/astro-ph/0309636v1

Astronomy and Astrophysics

Astrophysics

To appear in the Proceedings of IAU Symposium 221, Star Formation at High Angular Resolution, Editors M. Burton, R. Jayawardha

Scientific paper

We present subarcsecond observations at 2.7 and 1.4 mm of a sample of massive young stellar objects made with the BIMA millimetre array. For most sources the continuum emission on the smallest scales at 2.7 mm is dominated by free-free emission from the stellar wind or jet. Strong emission at 1.4 mm shows the presence of significant dust associated with Cep A and GL 490 but our resolution is not sufficient to resolve any structure. The 2.7-mm emission from GL 490 is resolved but it is not clear whether we are seeing a single circumstellar disk or a secondary companion, although near-infrared data support the disk hypothesis. Estimates of the dust mass yield values of ~1--4 Msun within radii of 150 to 1000 AU.

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