Detection of Knots and Jets in IRAS 06061+2151

Details Detection of Knots and Jets in IRAS 06061+2151 Detection of Knots and Jets in IRAS 06061+2151

2004-02-14

arxiv.org/abs/astro-ph/0402352v2

Astron.Astrophys. 421 (2004) 1045-1050

Astronomy and Astrophysics

Astrophysics

Only the paper format style is changed in the revised version due to error in ps/pdf file generation, the paper content is not

Scientific paper

10.1051/0004-6361:20035748

We report detection of a Young Stellar Object with an evidence for an outflow in the form of knots in the molecular hydrogen emission line (2.121 micron) 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 0.5pc. The driving source for 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 1 type pre-mainsequence 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 Brackett gamma line at 2.167 micron. These spectra suggest that the excitation of the molecular hydrogen lines is probably due to a mild shock.

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