Title:[FeII]��1.644um Spectroscopic Survey of Outflows from Protostars
Author(s):Seina Nakaoka, Yoichi Itoh, Tae-Soo Pyo
Abstract:
Many young low-mass stars have protoplanetary disks and outflows. High-resolution optical spectroscopy have revealed energetic outflows from many class II objects. But such observations are difficult for class I objects because of large extinctions toward the objects.
Pyo et al. (2002) claimed that the [FeII] emission line (��=1.644um) is an excellent tracer for the outflows from embedded class I objects. However, only few class I objects have so far been known to have the [FeII] emission line.
We have carried out a low-resolution (R�`500) near-infrared spectroscopic observations (1.40um - 2.51um) of 6 embedded class I objects using the UKIRT telescope. We detected the [Fe II] emission line toward IRAS04361+2547 with the equivalent width of -5.09angstrom. The emission does not extend spatially, and its velocity structure is not resolved. For the other 5 objects, the [FeII] emission line were not detected with 3�� upper limits of 10.5angstrom in the equivalent widths.