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A remarkable multilobe molecular outflow - Rho Ophiuchi East, associated with IRAS 16293-2422
Mizuno, A.; Fukui, Y.; Iwata, T.; Nozawa, S.; Takano, T.
AA(Nagoya University, Japan), AB(Nagoya University, Japan), AC(Nagoya University, Japan), AD(Nagoya University, Japan), AE(Toyokawa Observatory, Japan)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 356, June 10, 1990, p. 184-194. (ApJ Homepage)
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NASA/STI Keywords:
Interstellar Matter, Molecular Clouds, Ophiuchi Clouds, Star Formation, Ammonia, Carbon Monoxide, Infrared Astronomy Satellite
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Rho Ophiuchi East is one of the molecular outflows discovered in the Nagoya CO survey of star formation regions (Fukui et al., 1986) and was independently discovered by Wootten and Loren (1987). IRAS 16293-2422 is the driving source of the outflow. A detailed observational study of this outflow source in the J = 1-0 and J = 2-1 transitions of CO and in the (J, K) = (1, 1) and (2, 2) transitions of NH3 was made with angular resolutions of 17-80 arcsecs. The high-velocity CO emission has been resolved into four compact separate lobes, consisting of two pairs of bipolar lobes, in addition to an extended monopolar blueshifted lobe. The NH3 cloud has a size of 2.5 x 2.5 arcmin being peaked at 1.7 arcmin east of IRAS 16293-2422. This NH3 peak is located just toward the edge of one of the compact blue CO lobes, showing a blueshift of 0.5 km/s from the rest of the NH3 cloud. The momentum involved in the NH3 peak is nearly equal to that of the CO lobe. It is suggested that the CO lobe has dynamically interacted with the NH3 core, resulting in the acceleration of the NH3 core by 0.5 km/s.

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