Observational constraints on a proto-stellar disc.

Details Observational constraints on a proto-stellar disc. Observational constraints on a proto-stellar disc.

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992dudi.work...51w&link_type=abstract

"Dusty Discs, Proceedings of the 9th RAL Workshop on Astronomy and Astrophysics. Edited by P.M. Gondhalekar.

Astronomy and Astrophysics

Astrophysics

Scientific paper

The candidate protostar VLA 1623 has been mapped in the sub-millimetre and shown to have a spherical envelope with a shallow (r-1/2) density gradient. Although it has a well-collimated bipolar outflow, it shows no evidence for a disc-like structure of the nature of that around the archetypal outflow source L1551-IRS5. Rather the data seem to indicate a "cored-apple" geometry for the circumstellar material, with the outflow sweeping a cavity along the axis of the apple. If there is a disc around VLA 1623 at the centre of the envelope it has to be optically thick at 2.7 mm and have a radius <80AU.

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