Maser H2O Outbursts & Bullets in Orion KL

Details Maser H2O Outbursts & Bullets in Orion KL Maser H2O Outbursts & Bullets in Orion KL

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..402..366d&link_type=abstract

Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies ASP Conference Series, Vol. 402, proceedings o

Astronomy and Astrophysics

Astrophysics

Scientific paper

We studied the structure of the H2O super maser region in Orion with VLBI angular resolution 0.1 mas or 0.05 AU. High activity was accompanied by powerful outbursts (F˜8MJy) and the ejection of bullets. The bullets are concentrated in a narrow angle ≤ 10^o on distances to 80 AU, moving with velocities 10-20 km/s. They have elongated ˜1-5 AU structure, sometimes comet-like or head-tail shape with brightness temperatures reaching Tb ˜ 1013 K. The bullets are fragments of the outflow. The maser emission is determined by collisions with surrounding medium. The visibility time of bullets is short - several months.

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