The Kinematics of the Methanol Maser at 6.7 GHz in Cepheus A

Details The Kinematics of the Methanol Maser at 6.7 GHz in Cepheus A The Kinematics of the Methanol Maser at 6.7 GHz in Cepheus A

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..402..392s&link_type=abstract

Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies ASP Conference Series, Vol. 402, proceedings o

Astronomy and Astrophysics

Astrophysics

Scientific paper

We have conducted VLBI observations of methanol masers at 6.7 GHz with JVN and water maser at 22.2 GHz with VERA in the massive star-forming region Cepheus A (Cep A). The distribution of methanol maser spots showed an arc-like structure. Comparing the distributions of CH_3CN line emission and continuum emission at 8, 22, and 43 GHz obtained from other observations, we inferred that the 6.7-GHz methanol masers in Cep A originates from a rotating disk with a radius of 690 AU, a PA of 110°, and an inclination of 73°. Also, some of the water masers in this region may be associated with the rotating disk.

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