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Milliarcsecond structure of methanol masers in L1206 and GL2789

Published online by Cambridge University Press:  03 August 2017

Maxim A. Voronkov
Affiliation:
Astro Space Center, Profsouznaya st. 84/32, 117997 Moscow, Russia
Vyacheslav I. Slysh
Affiliation:
Astro Space Center, Profsouznaya st. 84/32, 117997 Moscow, Russia

Abstract

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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 1.1 × 1010 K and 1.4 × 109K respectively.

Type
Part 1. Star Formation
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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