Dust emission from young outflows: the case of L1157

摘要: We present new high-sensitivity 1.3 mm bolometer observations of the young outflow L1157. These data show that continuum emission arises from four distinct components: a circumstellar disk, protostellar envelope, an extended flattened envelope --the dense remnant molecular cloud in which protostar was formed--, and itself, represents ~20% total flux. The exhibits two peaks are coincident with strong shocks southern lobe is dominated by thermal dust arising high velocity material. spectral index derived 850 mu Shirley et al. (2000), ~5 outflow, significantly higher than (~3.5). This can be explained important line contamination map, and/or different characteristics regions, possibly smaller grains post-shocks regions outflow. Our bipolar outflows compact must not misinterpreted as condensations when mapping star forming regions.