High-velocity molecular bullets in a fast bipolar outflow near L1448/IRS3

Details High-velocity molecular bullets in a fast bipolar outflow near L1448/IRS3 High-velocity molecular bullets in a fast bipolar outflow near L1448/IRS3

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...231..174b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 231, no. 1, May 1990, p. 174-186. Research supported by CAICYT.

Astronomy and Astrophysics

Astronomy

182

Interstellar Matter, Molecular Clouds, Star Formation, Vibrational Spectra, Accretion Disks, Flow Velocity, Millimeter Waves, Molecular Gases, Radio Sources (Astronomy)

Scientific paper

CS and (C-13)O observations are used to study the dense molecular material in the Perseus globule L1448. The core has a mass of 50 solar, a kinetic temperature of 12-14 K, and a volume H2 density of a few 10,000/cu cm. High-velocity outflowing gas is detected within the globule whose structure can be explained if it is the result of the superposition of two outflows, one probably driven by an undetected source and the other excited by IRS3, the brightest FIR object in L1448. Several small very well-defined high-velocity CO bullets are detected in the main outflow whose size is a about 0.03 pc and whose masses are a few 0.0001 solar. These clumps are observed in pairs symmetrically placed with respect to the U-star. The U-star outflow is highly collimated with the peculiarity that the highest velocity gas is more collimated than the slower gas. Braking processes are inferred at the zones of interface between the outflow and the ambient gas.

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