Discovery of an extremely high velocity, massive, and compact molecular outflow in Norma

Bronfman, L.; Garay, G.; Merello, M.; Mardones, D.; May J.; Brooks, KJ; Nyman, LA; Gusten, R

Abstract

G331.5-0.1 in the Norma spiral arm is one of the most luminous and extended cores of a giant molecular cloud (GMC), containing at least six massive and dense dust condensations. Here we report the discovery, from observations of several submillimeter molecular lines that were made using the Atacama Submillimeter Telescope (ASTE) and the Atacama Pathfinder Experiment Telescope (APEX), of an unresolved, extremely high velocity molecular outflow toward the brightest and most massive dust condensation. The outflow is massive and energetic (flow mass of ∼55 M⊙; momentum of ∼2.4 × 103 M⊙ km s_1; kinetic energy of ∼1.4 × 1048 ergs). These values are characteristic of flows driven by young massive stellar objects with Lbol ∼1 × 10 5 L⊙. We also report the detection, using the Australia Telescope Compact Array (ATCA), of a compact radio continuum source that is located at the center of the outflow and therefore likely to be its driving energy source. It has an spectral index between 4.8 and 8.6 GHz of 1.1 ± 0.2, suggesting that it might correspond to a collimated jet. © 2008. The American Astronomical Society. All rights reserved.

Más información

Título según WOS: Discovery of an extremely high velocity, massive, and compact molecular outflow in Norma
Título según SCOPUS: Discovery of an extremely high velocity, massive, and compact molecular outflow in norma
Título de la Revista: ASTROPHYSICAL JOURNAL
Volumen: 672
Número: 1
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2008
Página de inicio: 391
Página final: 397
Idioma: English
URL: http://stacks.iop.org/0004-637X/672/i=1/a=391
DOI:

10.1086/522487

Notas: ISI, SCOPUS