Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-02
Astronomy and Astrophysics
Astrophysics
3 pages, 1 figure, to be published in RevMexAA(SC) Winds Bubbles and Explosions, 9 - 13 September 2002, Patzcuaro, Mexico
Scientific paper
Here we present the discovery of a triple radio continuum source associated with IRAS 16547-4247. The spectral indices of the three components are consistent with a jet powered by a massive O-type star in the process of formation, with the outer radio components being the shocked gas at the working surfaces of the jet. The detected radio continuum emission from the central object is thought to arise from the jet itself, prior to the formation of a detectable HII region. All three radio continuum components are located within a molecular core of mass 10^3 M_sun. Our discovery makes IRAS 16547-4247 the most luminous (6.2 x 10^4 L_sun) young stellar object from which a thermal jet emanates, suggesting that the mechanism that produces jets in low-mass star formation also operates in high-mass star formation.
Brooks Kate J.
Garay Guido
Mardones Diego
Norris Ray P.
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