Oral Presentation

ALMA methanol maser polarimetry toward a massive star forming region, G10.34-0.14

Author(s): Ji-hyun Kang (KASI); Do-Young Byun (KASI); Kee-Tae Kim (KASI); Jongsoo Kim (KASI); Aran Lyo (KASI); Mi-Kyoung Kim(NOAJ); Wouter Vlemmings (Onsala Space Observatory); Boy Lankhaar (Onsala Space Observatory); Gabriele Surcis (INAF)

Presenter: Ji-hyun Kang (Korea Astronomy and Space Science Institute)

We present the preliminary results of the full polarization ALMA observations of the 95 GHz Class I methanol maser transition line toward a massive star forming region, G10.34-0.14. The ALMA data show three mm continuum sources in this region. We identified over 30 maser features together with the 20000 AU-sized thermal methanol outflow. The methanol outflow and some masers are related to the mm cores in the south. The northern mm core is located at the center of the EGO feature. The linear polarizations have been detected toward the top two strongest masers, which are located at the tip of the EGO feature, indicating their association. Their polarization properties are consistent to the VLBI polarimetric observations performed with the KVN telescope, in spite of two orders of magnitude scale differences, indicating that the masing regions have consistent magnetic field environments over these scale lengths (6 AU to 600 AU).