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Aperture Synthesis Observations of CS, NH3, and Continuum in the Bipolar Flow Source NGC2071-IRS

Published online by Cambridge University Press:  12 April 2016

R. Kawabe ,
M. Kitamura ,
M. Ishiguro ,
T. Hasegawa ,
Y. Chikada  and
S. K. Okumura
R. Kawabe
Affiliation:
NOBEYAMA RADIO OBSERVATORY, NATIONAL ASTRONOMICAL OBSERVATORY
M. Kitamura
Affiliation:
NOBEYAMA RADIO OBSERVATORY, NATIONAL ASTRONOMICAL OBSERVATORY
M. Ishiguro
Affiliation:
NOBEYAMA RADIO OBSERVATORY, NATIONAL ASTRONOMICAL OBSERVATORY
T. Hasegawa
Affiliation:
INSTITUTE OF ASTRONOMY, UNIVERSITY OF TOKYO
Y. Chikada
Affiliation:
NOBEYAMA RADIO OBSERVATORY, NATIONAL ASTRONOMICAL OBSERVATORY
S. K. Okumura
Affiliation:
NOBEYAMA RADIO OBSERVATORY, NATIONAL ASTRONOMICAL OBSERVATORY

Abstract.

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We have made aperture synthesis observations of CS(J=l-0, 2-1) and NH3(1,1) lines and 49, 98, and 110 GHz continuum in NGC2071-1RS with the Nobeyama Millimeter Array. Wfe have obtained maps of these lines and continuum maps with 2”. 7-20” resolution, ffe have found that dense molecular gas has a disk structure with a radial scale ranging 0.01 pc - 0.1 pc and has a ring-like structure with expanding motion at the central 5000 AU region. We also have found that there exists double dust continuum sources which are separated by 2500 AU in projection and are apparently located at the inner edges of the ring. Our observational results suggest that the disk of molecular gas has a central hole formed by wind and UV radiation from a central young stellar object, the central part is expanding, and that dust continuum emission comes from tangential parts of the shock compressed ring (r~1300 AU, M(H2)~ 21-34 Mo, and n(H2)~ 109) at the most inner side of the disk structure. The other possible model of the dust continuum sources is a binary system of self-luminous young stellar objects.

Type
III. Discs, Outflows, Jets and HH Objects
Information
International Astronomical Union Colloquium , Volume 120: Structure and Dynamics of the Interstellar Medium , 1989 , pp. 254 - 259
Copyright
Copyright © Springer-Verlag 1989

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