Alma Observations of the Massive Molecular Outflow G331.512-0.103

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Date

2013-09

Authors

Merello, Manuel
Bronfman, Leonardo
Garay, Guido
Lo, Nadia
Evans, Neal J., II
Nyman, Lars-Åke
Cortes, Juan R.
Cunningham, Maria R.

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Abstract

The object of this study is one of the most energetic and luminous molecular outflows known in the Galaxy, G331.512-0.103. Observations with ALMA Band 7 (350 GHz; 0.86 mm) reveal a very compact, extremely young bipolar outflow and a more symmetric outflowing shocked shell surrounding a very small region of ionized gas. The velocities of the bipolar outflow are about 70 km s(-1) on either side of the systemic velocity. The expansion velocity of the shocked shell is similar to 24 km s(-1), implying a crossing time of about 2000 yr. Along the symmetry axis of the outflow, there is a velocity feature, which could be a molecular "bullet" of high-velocity dense material. The source is one of the youngest examples of massive molecular outflow found associated with a high-mass star.

Department

Astronomy

Description

Keywords

ism: jets and outflows, ism: molecules, stars: Formation, bipolar outflow, star-Formation, milky-way, g5.89-0.39, emission, clouds, astronomy & astrophysics

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Citation

Merello, Manuel, Leonardo Bronfman, Guido Garay, Nadia Lo, Neal J. Evans, and Maria R. Cunningham. "ALMA Observations of the Massive Molecular Outflow G331. 512? 0.103." The Astrophysical Journal Letters, Vol. 774, No. 1 (Sep., /2013): L7.

URI

http://hdl.handle.net/2152/42898

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