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Outflow and disk around the very young massive star GH2O 092.67+03.07
J.P. Bernard 1,
K. Dobashi 2 and
M. Momose 3
Received 6 October 1998 / Accepted 9 June 1999
We present CS(J=2-1) interferometric observations obtained with the Nobeyama Millimeter Array (NMA) toward a protostar () in the Cygnus OB7 giant molecular cloud (distance=800 pc). The data clearly indicate the presence of a compact (size ) and young outflow with dynamical time scale year. The outflow is surrounded by a massive gas condensation. The analysis of the gas dynamics shows the signature of an infalling and rotating disk, which could be the first clear detection of such motion around a young high mass star. Single dish data obtained with the Nobeyama 45m antenna in several molecular lines are used to derive the CS abundance and the optical depth of the CS(J=2-1) toward . We derive a total mass of and for the outflow and disk respectively. The comparison of the NMA data with a simple model of infalling disk indicates a mass of the central object in the range .
We propose that is a dust condensation in the very early steps of forming a high mass star.
Key words: ISM: clouds ISM: jets and outflows stars: formation stars: individual: GH2O 092.67+03.07
Send offprint requests to: J.P. Bernard (email@example.com)
Online publication: September 24, 1999