Multiple monopolar outflows driven by massive protostars in IRAS 18162-2048

In this paper we present Combined Array for Research in Millimeter-wave Astronomy (CARMA) 3.5 mm observations and SubMillimeter Array (SMA) 870 microns observations toward the high-mass star-forming region IRAS 1816-2048, the core of the HH 80/81/80N system. Molecular emission from HCN, HCO+ and SiO...

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Bibliographic Details
Published in:arXiv.org 2013-10
Main Authors: Fernández-López, Manuel, Girart, Josep M, Curiel, Salvador, Zapata, Luis Alberto, Jose Pablo Fonfría, Qiu, Keping
Format: Article
Language:English
Subjects:
Angular resolution
Astronomy
Massive stars
Millimeter waves
Outflow
Physical properties
Protostars
Star formation
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Summary:In this paper we present Combined Array for Research in Millimeter-wave Astronomy (CARMA) 3.5 mm observations and SubMillimeter Array (SMA) 870 microns observations toward the high-mass star-forming region IRAS 1816-2048, the core of the HH 80/81/80N system. Molecular emission from HCN, HCO+ and SiO is tracing 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 a couple protostars. We estimate for the first time the physical characteristics of these molecular outflows, which are similar to those of 1000-5000 Lo protostars, suggesting that MM2 harbors high-mass protostars. High-angular resolution CO observations show an additional outflow due southeast. We identify for the first time 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, explaining their asymmetric shape as a consequence of possible deflection.
ISSN:2331-8422
DOI:10.48550/arxiv.1310.1011