ALMA observations of the massive molecular outflow G331.512-0.103

Дата и время публикации : 2013-07-23T20:58:39Z

Авторы публикации и институты :
Manuel Merello
Leonardo Bronfman
Guido Garay
Nadia Lo
Neal J. Evans II
Lars-Ake Nyman
Juan R. Cortés
Maria R. Cunningham

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 9 pages, 4 figures, 1 table, Accepted for publication in The Astrophysical Journal Letters, small typos corrected
Первичная категория: astro-ph.GA

Все категории : astro-ph.GA

Краткий обзор статьи: 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 ~24 km s^{-1}, implying a crossing time of about 2000 yrs. 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.

Category: Physics