SiO Masers in the Orion BN-KL Outflow

Details SiO Masers in the Orion BN-KL Outflow SiO Masers in the Orion BN-KL Outflow

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20921904b&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #219.04; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present new maps of the v=1,2 J=1->0 transitions of silicon monoxide masers in the Orion KL nebula with data obtained using an array combining the VLA and the VLBA PieTown antenna. These masers are centered on Source I a continuum source thought to mark the position of a massive young star and provide a probe of the stellar environment on scales of tens of AU. The images in both maser transitions achieve angular resolutions of 50 milliarcsec, sufficient to search for the location of emission that has been resolved in previous Very Long Baseline Interferometry observations. Both vibrational maser transitions were registered by using a reference quasar observed for calibration purposes, and spatial offsets between the lines indicate gradients in physical conditions on AU scales. We review implications of these results on current models of the circumstellar environment of this massive Young Stellar Object.

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