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26 April 2024 |
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Article overview
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Fast molecular jet from L1157-mm | | M. Tafalla
; R. Bachiller
; B. Lefloch
; N. Rodríguez-Fernández
; C. Codella
; A. López-Sepulcre
; L. Podio
; | | Date: |
3 Dec 2014 | | Abstract: | L1157-mm powers a molecular outflow that is well-known for its shock-induced
chemical activity in several hot-spots. We have studied the molecular emission
toward L1157-mm searching for a jet component responsible for these spots. We
used the IRAM 30m telescope to observe the vicinity of L1157-mm in several
lines of SiO. The SiO(5-4) and SiO(6-5) spectra toward L1157-mm present blue
and red detached components about 45 km/s away from the ambient cloud. These
extremely high-velocity (EHV) components are similar to those found in the
L1448 and IRAS 04166+2706 outflows, and probably arise from a molecular jet
driven by L1157-mm. Observations of off-center positions indicate that the jet
is unresolved in SiO(5-4) (<11"). The EHV jet seen in SiO probably excites
L1157-B1 and the other chemically active spots of the L1157 outflow. | | Source: | arXiv, 1412.1476 | | Services: | Forum | Review | PDF | Favorites | |
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