Continuum emission at 220 and 355 GHz from the prototype Class 0 source VLA 1623 has been detected 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 \sim 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 \sim 6 \times 10 ^ { 4 } yr , consistent with previous suggestions that Class 0 sources are quite young .
The innermost region of the disk within \sim 6 AU is likely to be in centrifugal support , which is likely large enough to provide a drive for the outflow according to current theoretical models .
Alternatively , if 175 AU corresponds to the centrifugal radius of the disk , the age of the system is \sim 2 \times 10 ^ { 5 } yr , closer to age estimates for Class I sources .