HIGH-RESOLUTION LAMBDA=2.7 MILLIMETER OBSERVATIONS OF L1551 IRS-5 - APROTOBINARY SYSTEM

We present subarcsecond resolution imaging of the lambda = 2.7 mm cont inuum emission from the young, embedded system L1551 IRS 5 using the n ine-element, high-resolution configuration of the BIMA array. The obse rved emission arises from two compact sources separated by 0.'' 35, co inciding with the two sources seen at lambda = 2 cm and lambda = 1.3 c m. When the high-resolution data are combined with data from two compa ct configurations, L1551 IRS 5 is argued to consist of a protobinary s ystem separated by similar to 50 AU with individual circumstellar disk s, a circumbinary structure, and a large-scale envelope. The character istic masses of the components are 0.024 M. for the northern circumste llar disk, 0.009 M. for the southern circumstellar disk, 0.04 M. for t he circumbinary material, and 0.28 M. for the envelope.