The Star-Forming Region in Orion KL

Details The Star-Forming Region in Orion KL The Star-Forming Region in Orion KL

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003astl...29..641m&link_type=abstract

Astronomy Letters, vol. 29, p. 641-643 (2003)

Astronomy and Astrophysics

Astronomy

5

Scientific paper

We have studied the fine structure of the active H_2O supermaser emission region in Orion KL with an angular resolution of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation. The ejector is a bright compact source < 0.05 AU in size with a brightness temperature T_b 1017 K. The highly collimated bipolar outflow 30 has a velocity vej 10 km/s, a rotation period of 0.5 yr, a precession period of 10 yr, and a precession angle of 33 deg. Precession gives rise to a jet in the shape of a conical helix. The envelope amplifies the radio emission from the components by about three orders of magnitude at a velocity v = 7.65 km/s.

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