A Massive Protostar Embedded in the SCUBA Core JCMT 18354-0649S

Type Journal Article
Names Ming Zhu, C. J. Davis, Yufang Wu, B. A. Whitney, T. Robitaille, R. Peng
Publication The Astrophysical Journal
Volume 739
Issue 1
Pages 53
Date September 1, 2011
URL http://adsabs.harvard.edu/abs/2011ApJ...739...53Z
Library Catalog NASA ADS
Abstract We report the discovery of an extremely red object embedded in the massive SCUBA core JCMT 18354-0649S. This object is not associated with any known radio or far-IR source, though it appears in Spitzer IRAC data obtained as part of the GLIMPSE survey. At shorter wavelengths, this embedded source exhibits an extreme color, K – L' = 6.7. At an assumed distance of 5.7 kpc, this source has a near-IR luminosity of ~1000 L sun. Its spectral energy distribution (SED) rises sharply from 2.1 μm to 8 μm, similar to that of a Class 0 young stellar object. Theoretical modeling of the SED indicates that the central star has a mass of 6-12 M sun, with an optical extinction of more than 30. As both inflow and outflow motions are present in JCMT 18354-0649S, we suggest that this deeply embedded source is (1) a massive protostar in the early stages of accretion, and (2) the driving source of a massive molecular outflow evident in HCN J = 3-2 profiles observed toward this region.
Tags Infrared: Stars, STARS: FORMATION, infrared: ISM
UW-Madison Astronomy Home