Milliarcsecond structure of methanol masers in L1206 and GL2789

Details Milliarcsecond structure of methanol masers in L1206 and GL2789 Milliarcsecond structure of methanol masers in L1206 and GL2789

2001-05-23

arxiv.org/abs/astro-ph/0105406v2

Astronomy and Astrophysics

Astrophysics

4 pages, 6 figures, proceedings of IAU206, newpasp.sty is included, Fig. 2a was changed

Scientific paper

We report results of EVN interferometric study of two star-forming regions L1206 and GL2789 in the brightest methanol maser line at 6.7 GHz. Using measured absolute positions both methanol masers were identified with protostars which are sources of bipolar outflows. Both masers consist of several maser spots, with some of them being aligned in a linear structure with velocity gradient probably delineating edge-on circumstellar disks. We estimated the radii of such disks to be 140 AU and 280 AU (or 700 AU for the whole structure treated as a disk) for L1206 and GL2789 respectively. The brightness temperatures of the most intense features in L1206 and GL2789 are at least 1.1x10^10 K and 1.4x10^9 K respectively.

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