Discovery of a jet in the region of H2O supermaser emission in Orion KL

Astronomy and Astrophysics – Astronomy

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Scientific paper

On May 26, 1995, we studied the region of H2O supermaser emission in Orion KL in a `quiescent' period by using VLBA with an angular resolution of 0.3 x 0.7 mas. We detected a jet and two compact features. This bipolar structure complements the previously discovered star-accretion disk system. The jet is 5.5 x 0.5 AU in size, and its position angle is PA = 33 deg. The brightness temperature of the bipolar structure is T_b ~ 10^12 K. The radio flux density of the jet is F = 1060 Jy. The emission exhibits a linear polarization that reaches 45%.

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