Detection of knots and jets in IRAS 06061+2151

被引:10
作者
Anandarao, BG [1 ]
Chakraborty, A
Ojha, DK
Testi, L
机构
[1] Phys Res Lab, Ahmedabad 390009, Gujarat, India
[2] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA
[3] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[4] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy
[5] Natl Astron Observ Japan, Tokyo 1818588, Japan
关键词
stars : pre-main sequence; ISM : jets and outflows; stars : formation;
D O I
10.1051/0004-6361:20035748
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report detection of a Young Stellar Object with evidence of outflow in the form of knots in the molecular hydrogen emission line (2.121 mum) towards the massive star forming region IRAS 06061+2151. Near-infrared images reveal IRAS 06061+2151 to be a cluster of at least five sources, four of which seem to be early B type young stellar objects, in a region of 12 arcsec surrounded by a nebulosity. The presence of the knots that are probably similar to the HH objects in the optical wavelengths suggests emerging jets from one of the cluster members. These jets appear to excite a pair of knot-like objects (Knot-NW and Knot-SE) and extend over a projected size of 0.5 pc. The driving source of the jets is traced back to a member of the cluster whose position in the H - Ks/J - H color-color diagram indicates that it is a Class I type pre-main sequence star. We also obtained K band spectra of the brightest source in the cluster and of the nearby nebular matter. The spectra show molecular hydrogen emission lines but do not show the Brgamma line (2.167 mum). These spectra Suggest that the excitation of the molecular hydrogen lines is probably due to a mild shock.
引用
收藏
页码:1045 / 1050
页数:6
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