THE SPITZER c2d SURVEY OF NEARBY DENSE CORES: JET AND MOLECULAR OUTFLOW ASSOCIATED WITH A YOUNG STELLAR OBJECT IN CORE A OF L1251

Journal Article · Wed Jan 20 00:00:00 EST 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/709/1/L74; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21301383

Lee, Jeong-Eun; Kim, Il-Suk; Choi, Yunhee ^[1]; Lee, Ho-Gyu ^[2]; Shinn, Jong-Ho ^[3]; Dunham, Michael M; Evans, Neal J ^[4]; Kim, Chang Hee ^[5]

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1. Department of Astronomy and Space Science, Astrophysical Research Center for the Structure and Evolution of the Cosmos, Sejong University, Seoul 143-747 (Korea, Republic of)
2. Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON, M5S 3H4 (Canada)
3. Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of)
4. Astronomy Department, University of Texas at Austin, 1 University Station C1400, Austin, TX 78712-0259 (United States)
5. Department of Physics and Astronomy, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul 151-747 (Korea, Republic of)

A long infrared jet has been discovered by the Spitzer c2d Legacy Program in core A of L1251. It is associated with a very embedded Class 0 object with an accretion luminosity of about 0.9 L {sub sun} derived by radiative transfer model fitting to the observed spectral energy distribution. Comparing the observed Infrared Array Camera colors along the infrared jet with those calculated from a model of an admixture of gas with a power-law temperature distribution indicates that the jet is possibly created by a paraboloidal bow shock propagating into the ambient medium of n(H{sub 2}) = 10{sup 5} cm{sup -3}. In addition, the variation of the power-law index along the jet suggests that the portion of hot gas decreases with distance from the jet engine. The molecular outflow in this region has been mapped for the first time using CO data. From the calculated outflow momentum flux, a very strong lower limit to the average accretion luminosity is 3.6 sin i/cos{sup 3} i L {sub sun}, indicative of a decrease in the accretion rate with time.

• OSTI ID: 21301383
• Journal Information: Astrophysical Journal Letters, Vol. 709, Issue 1; Other Information: DOI: 10.1088/2041-8205/709/1/L74; Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CAMERAS
CARBON MONOXIDE
ENERGY SPECTRA
JETS
LUMINOSITY
RADIANT HEAT TRANSFER
SHOCK WAVES
STARS
TEMPERATURE DISTRIBUTION