Subaru high-dispersion spectroscopy of Hα and [NII] 6584 Å emission in the HL Tau jet
Abstract
We present slit-scan observations of the Hα and [NII] 6584 Å emission lines toward the HL Tau jet with the 8.2m Subaru Telescope. HL Tau is an active young star in transitional phase from an embedded class I protostar to a class II pre-main-sequence star, and it is located in the northeastern part of the L1551 dark cloud. The slit-scan technique at high spectral resolution (R=3.6×104) allowed for studying kinematics of individual features in unprecedented details. The Hα emission shows the main jet component (VLSR ~ −180 km s−1) and distinct lower velocity components (∣VLSR∣<120 km s−1). The [NII] emission is primarily associated with the jet within 10 arcsecond from the source, and also knot B and C ~30 arcsecond away from the source. These are associated with the main jet component, and absent in the lower velocity components. The velocity of Hα and [NII] emissions in the main jet component well matches each other.
- Publication:
-
Triggered Star Formation in a Turbulent ISM
- Pub Date:
- 2007
- DOI:
- 10.1017/S1743921307002414
- Bibcode:
- 2007IAUS..237..453N
- Keywords:
-
- stars: individual (HL Tauri);
- stars: pre-main-sequence;
- ISM: jet