Barnard 203
The dark nebula Barnard 203 or Lynds 1448 is located about one degree southwest of NGC 1333 in the Perseus molecular cloud, at a distance of about 800 light-years. Three infrared sources were observed in this region by IRAS, called IRS 1, IRS 2 and IRS 3. The region also contains multiple Herbig-Haro objects, including HH 193–197, which are driven by the protostars in this region. The young stellar object population The source IRS 1 is a class I young stellar object and a binary. IRS 1 is more evolved than most of the protostars in this region and less well-studied. The source IRS 2 is a binary that is very young (class 0 young stellar object), surrounded by a rotating disk and the system shows a bipolar outflow signature. The system has an hourglass shaped magnetic field that is aligned with the bipolar outflow. Towards the east is the source IRS 2E, a source between a pre-stellar core and a protostar. The source IRS 3B was studied the most and ALMA showed that it is a triple protostar system with one star forming via disk fragmentation. The two outer stars are separated by 61 and 183 astronomical units from