Star formation region in Vela |
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| Authors: | A L Gyulbudaghian J May |
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| Institution: | (1) V. A. Ambartsumian Astrophysical Observatory, Armenia;(2) Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile |
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| Abstract: | A star formation region connected with SNO 41 is investigated. The observations of this region were carried out in the 12CO (1-0) line and in the 1.2-mm (with SIMBA) with the 15-m SEST mm telescope (Cerro La Silla, Chile). A blue shifted outflow
is revealed from the 12CO(1-0) observations, while a bipolar outflow is apparent from the 1.2-mm SIMBA image. In CO it seems that a very faint dust
envelope around SNO 41 probably exists, which is expanding with a velocity of ∼10.5 km/s. The distance to SNO 41 is estimated
as ∼1500 pc. There are outflows also present in 2MASS images. A spiral jet has a condensation (resembling a HH object) at
the end. Another jet has a discontinuity and a bow-shock-like structure on it. In 2MASS images there are also spots resembling
HH objects. In this region there is also a rather luminous point source (IRAS 08546-4254), which has IR colors typical for
an YSO connected with a water maser. The detection of a strong CS (2-1) line emission toward IRAS 08546-4254, with the same
velocity as the CO line, shows the existence of a high density core of molecular gas associated to this source. A methanol
maser is also associated with that IRAS source. The existence of CS line emission and a methanol maser (at 6.669 Ghz) is an
indication of the presence of a very young massive star. It is not excluded that this IRAS source is the center of outflows
mentioned above, because this source coincides with the center of the 1.2-mm SIMBA image and also with the place of origin
of the jet with bow-shock-like structure.
Published in Astrofizika, Vol. 50, No. 1, pp. 5–15 (February 2007). |
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| Keywords: | ISM star formation-individual SNO 41 |
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