Accretion disks around class 0 protostars: The case of VLA 1623

Details Accretion disks around class 0 protostars: The case of VLA 1623 Accretion disks around class 0 protostars: The case of VLA 1623

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..393..117w&link_type=abstract

The seventh astrophysical conference: Star formation, near and far. AIP Conference Proceedings, Volume 393, pp. 117-120 (1997).

Astronomy and Astrophysics

Astrophysics

Pre-Main Sequence Objects, Young Stellar Objects And Protostars, Accretion And Accretion Disks, Star Formation, Circumstellar Shells, Clouds, And Expanding Envelopes, Circumstellar Masers

Scientific paper

We have detected continuum emission at 220 and 355 GHz from the prototype Class 0 source VLA 1623 using the JCMT-CSO interferometer. Gaussian fits to the data place an upper limit of 70 AU on the half-width half-maximum radius of the emission, which implies an upper limit of ~175 AU for the cutoff radius of the circumstellar disk in the system. In the context of existing collapse models, this disk could be magnetically supported on the largest scales and have an age of ~6×104 yr, consistent with previous suggestions that Class 0 sources are quite young. Alternatively, if 175 AU corresponds to the centrifugal radius of the disk, the age of the system is ~2×105 yr, closer to age estimates for Class I sources.

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