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http://hdl.handle.net/20.500.12386/27335| Title: | Fast molecular jet from L1157-mm | Authors: | Tafalla, M. Bachiller, R. Lefloch, B. Rodríguez-Fernández, N. CODELLA, CLAUDIO López-Sepulcre, A. PODIO, LINDA |
Issue Date: | 2015 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 573 | First Page: | L2 | Abstract: | Context. L1157-mm powers a molecular outflow that is well-known for its shock-induced chemical activity in several hot-spots. Aims: We have studied the molecular emission toward L1157-mm searching for a jet component responsible for these spots. Methods: We used the IRAM 30 m telescope to observe the vicinity of L1157-mm in several lines of SiO. Results: The SiO(5-4) and SiO(6-5) spectra toward L1157-mm present blue and red detached components about 45 km s<SUP>-1</SUP> 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''). <BR /> Conclusions: The EHV jet seen in SiO probably excites L1157-B1 and the other chemically active spots of the L1157 outflow. <P />Based on IRAM 30 m Telescope observations. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain).Tables 1 and 2 are available in electronic form at <A href="http://www.aanda.org/10.1051/0004-6361/201425255/olm">http://www.aanda.org | Acknowledgments: | We thank the IRAM staff for assistance and the referee for a careful reading of the manuscript. We acknowledge support from projects FIS2012-32096 and AYA2012-32032 of Spanish MINECO and from the MICINN program CONSOLIDER INGENIO 2010, grant “Molecular Astrophysics: The Herschel and ALMA era – ASTROMOL” (ref.: CSD2009-00038). LP has received funding from the European Union Seventh Framework Programme (FP7/20072013) under grant agreement No. 267251. This research has made use of NASA’s Astrophysics Data System Bibliographic Services. | URI: | http://hdl.handle.net/20.500.12386/27335 | URL: | https://www.aanda.org/articles/aa/abs/2015/01/aa25255-14/aa25255-14.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201425255 | Bibcode ADS: | 2015A&A...573L...2T | Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| aa25255-14.pdf | PDF editoriale | 666.32 kB | Adobe PDF | View/Open |
| 1412.1476.pdf | postprint | 292.25 kB | Adobe PDF | View/Open |
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