Abstract
Polarization observations of the H2O maser emission at 1.35 cm from the active region Orion KL were carried out at epoch 2011.7 on the Svetloe-Zelenchukskaya radio interferometer. The observational data have been processed on the correlator of the QUASAR network. Fragments of the structure have been identified; the line velocities and profile widths and the emission polarization have been determined. The component at the radial velocity V = 7.0 km s−1 has been taken as a reference one. Its effective size in the Gaussian approximation is 1.5 mas, the axial ratio is Major/Minor = 3.3, and the orientation is PA = 11°. The component V = 7.6 km s−1 corresponds to a bipolar outflow with an effective size of 6.2 mas, the axial ratio is Major/Minor = 5.3, and the orientation −32°. The bipolar outflow is 10 mas away from the reference feature in the direction of 173°. The longitudinal velocity components of the NW and SE parts of the bipolar outflow in the local standard of rest are +0.15 and −0.15 km s−1, respectively. The degrees of polarization of the emission from the reference feature (7.0 km s−1) and the bipolar outflow are m = 39 and 52%, respectively. The difference in polarization orientations of both components Δ χ does not exceed 3°.
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Original Russian Text © L.I. Matveyenko, V.A. Demichev, A.V. Ipatov, A.E. Melnikov, I.F. Surkis, 2012, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2012, Vol. 38, No. 9, pp. 645–651.
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Matveyenko, L.I., Demichev, V.A., Ipatov, A.V. et al. Polarization of the H2O maser emission from Orion KL at epoch 2011.7. Astron. Lett. 38, 575–580 (2012). https://doi.org/10.1134/S1063773712090022
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DOI: https://doi.org/10.1134/S1063773712090022