MULTIPLE MONOPOLAR OUTFLOWS DRIVEN BY MASSIVE PROTOSTARS IN IRAS 18162-2048

作者：Fernandez Lopez M^*; Girart J M; Curiel S; Zapata L A; Fonfria J P; Qiu K

来源：Astrophysical Journal, 2013, 778(1): 72.

DOI：10.1088/0004-637X/778/1/72

• ISM: individual objects (GGD27, HH 80-81, IRAS 18162-2048)
• ISM: jets and outflows
• stars: formation
• stars: protostars

In this article, we present Combined Array for Research in Millimeter-wave Astronomy (CARMA) 3.5 mm observations and SubMillimeter Array (SMA) 870 mu m observations toward the high-mass star-forming region IRAS 18162-2048, which is the core of the HH 80/81/80N system. Molecular emission from HCN, HCO+, and SiO traces two molecular outflows (the so-called northeast and northwest outflows). These outflows have their origin in a region close to the position of MM2, a millimeter source known to harbor two protostars. For the first time we estimate the physical characteristics of these molecular outflows, which are similar to those of 10(3)-5 x 10(3) L-circle dot protostars, and suggest that MM2 harbors high-mass protostars. High-angular resolution CO observations show an additional outflow due southeast. Also for the first time, we identify its driving source, MM2(E), and see evidence of precession. All three outflows have a monopolar appearance, but we link the NW and SE lobes, and explain their asymmetric shape as being a consequence of possible deflection.

• 出版日期2013-11-20
• 单位南京大学