A MASSIVE PROTOSTAR EMBEDDED IN THE SCUBA CORE JCMT 18354-0649S

作者：Zhu, Ming^*; Davis, C. J.; Wu, Yufang; Whitney, B. A.; Robitaille, T.; Peng, R.

来源：Astrophysical Journal, 2011, 739(1): 53.

DOI：10.1088/0004-637X/739/1/53

• infrared: ISM
• infrared: stars
• stars: formation

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 similar to 1000 L-circle dot. Its spectral energy distribution (SED) rises sharply from 2.1 mu m to 8 mu m, 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-circle dot, 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.

• 出版日期2011-9-20
• 单位中国科学院国家天文台; 北京大学