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

Journal Article · Tue Sep 20 04:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/739/1/53; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21587514

Ming, Zhu ^[1]; Davis, C J ^[2]; Wu, Yufang ^[3]; Whitney, B A ^[4]; Robitaille, T ^[5]; Peng, R ^[6]

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1. National Astronomical Observatory of China, 20A Datun Road, Chaoyang District, Beijing (China)
2. Joint Astronomy Centre, 660 N. A'ohoku Place, Hilo, HI 96720 (United States)
3. Astronomy Department, Peking University, Beijing 100871 (China)
4. Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301 (United States)
5. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
6. Caltech Submillimeter Observatory, 111 Nowelo Street, Hilo, HI 96720 (United States)

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 {approx}1000 L{sub sun}. 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{sub 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.

• OSTI ID: 21587514
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 739; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
INFRARED RADIATION
LUMINOSITY
MASS
NEAR INFRARED RADIATION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PROTOSTARS
RADIATIONS
SIMULATION
SPECTRA
STARS