Astrophys. J., 778, 72 (2013/November-3)
Multiple monopolar outflows driven by massive protostars in IRAS 18162-2048.
FERNANDEZ-LOPEZ M., GIRART J.M., CURIEL S., ZAPATA L.A., FONFRIA J.P. and QIU K.
Abstract (from CDS):
In this article, we present Combined Array for Research in Millimeter-wave Astronomy (CARMA) 3.5 mm observations and SubMillimeter Array (SMA) 870 µm 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 103-5x103 L☉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.
ISM: individual (GGD27, HH 80-81, IRAS 18162-2048) - ISM: jets and outflows - stars: formation - stars: protostars
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