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R. Bachiller , S. Guilloteau , F. Gueth ,
M. Tafalla ,
A. Dutrey , C. Codella , A. Castets
IGN Observatorio Astronomico Nacional,
Apartado 1143, E-28800 Alcalá de Henares (Madrid), Spain
300 rue de la Piscine, F-38406 Saint Martin d'Hères, France
Auf dem Hügel 69, D-53121 Bonn, Germany
F-38041 Grenoble Cedex 9, France
Abstract: We present interferometric images of the 1.3 and 3.5 mm continuum
and the SiO J = 2 1 emission towards the SVS13/HH7-11 vicinity
(see Fig 7).
The continuum data resolve SVS13 into two components separated by
14 .5 ( 4300 AU) and having very similar millimeter properties:
each of them has about 1 M of circumstellar material and its
emission is characterized by a spectral index of 2.5. One
of the components, SVS13B,
lacks optical, near infrared, or cm-wave counterpart, and is only
detectable at millimeter waves, a fact that suggests it represents an extremely
embedded, Class 0 object. This source, in addition, powers a remarkably
collimated molecular outflow as seen by a high velocity SiO jet.
HH12, HH16, and HH352 lie along the line of this jet,
suggesting they are also excited by SVS13B.
Our observations highlight the star-formation richness of the HH7-11 region
which contains in a small area some of the youngest and most
extraordinary outflows known.
Astronomy & Astrophysics Lett. in press
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