| Autor: |
Klaassen PD; UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK., Mottram JC; Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands; Max-Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany., Maud LT; Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands., Juhasz A; Institute of Astronomy, Madingley Road, Cambridge CB3 OHA, UK. |
| Jazyk: |
angličtina |
| Zdroj: |
Monthly notices of the Royal Astronomical Society [Mon Not R Astron Soc] 2016 Apr 28; Vol. 460 (1), pp. 627-633. Date of Electronic Publication: 2016 Apr 28 (Print Publication: 2016). |
| DOI: |
10.1093/mnras/stw989 |
| Abstrakt: |
Outflowing motions, whether a wind launched from the disc, a jet launched from the protostar, or the entrained molecular outflow, appear to be a ubiquitous feature of star formation. These outwards motions have a number of root causes, and how they manifest is intricately linked to their environment as well as the process of star formation itself. Using the Atacama Large Millimeter/submillimeter Array (ALMA) Science Verification data of HL Tau, we investigate the high-velocity molecular gas being removed from the system as a result of the star formation process. We aim to place these motions in context with the optically detected jet, and the disc. With these high-resolution (∼1 arcsec) ALMA observations of CO (J=1-0), we quantify the outwards motions of the molecular gas. We find evidence for a bipolar outwards flow, with an opening angle, as measured in the redshifted lobe, starting off at 90°, and narrowing to 60° further from the disc, likely because of magnetic collimation. Its outwards velocity, corrected for inclination angle is of the order of 2.4 km s -1 . |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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