Active star-forming region in Orion KL, epoch 2012 |
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Authors: | L I Matveyenko V A Demichev A V Ipatov A E Melnikov I F Surkis |
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Institution: | 1. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia 2. Institute of Applied Astronomy, Russian Academy of Sciences, Zhdanovskaya ul. 8, St. Petersburg, 197110, Russia
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Abstract: | Polarization measurements of the H2O maser emission from the active region in Orion KL were carried out at epoch 2011?C2012 on the Svetloe-Zelenchukskaya radio interferometer. The bipolar outflow structure and polarized emission parameters have been determined. The emission from the components at v = 7.6 and 7.0 km s?1 dominates in the line profile; the relative contribution of the former component has increased. The velocity of the bipolar outflow ejector region is almost equal to that of the local standard of rest v LSR = 7.65 km s?1, while the velocity of the remote component is v = 7.0 km s?1. The emission from the bipolar outflow is observed at a distance up to 11 mas from the ejector. Its diameter does not exceed 0.3 mas. The outflow orientation in the plane of the sky is ?37°. The outflow velocity components along the line of sight differ by ??v = 0.3 km s?1. The polarization levels of the bipolar outflow and the remote component reach m = 62 and 39%, respectively. |
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