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Observing the onset...
Observing the onset of outflow collimation in a massive protostar
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- Carrasco-Gonzalez, C. (author)
- Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico
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- Torrelles, J. M. (author)
- Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC
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- Canto, J. (author)
- Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico
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- Curiel, S. (author)
- Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico
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- Surcis, G. (author)
- Joint Institute for VLBI in Europe (JIVE)
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- Vlemmings, Wouter, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- van Langevelde, H. J. (author)
- Joint Institute for VLBI in Europe (JIVE),Universiteit Leiden (UL),Leiden University (UL)
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- Goddi, C. (author)
- Joint Institute for VLBI in Europe (JIVE),Radboud Universiteit,Radboud University
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- Anglada, G. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Kim, S. W. (author)
- University of Science and Technology (UST),Korea Astronomy and Space Science Institute
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- Kim, J. S. (author)
- National Astronomical Observatory of Japan
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- Gomez, J. F. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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(creator_code:org_t)
- American Association for the Advancement of Science (AAAS), 2015
- 2015
- English.
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In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 348:6230, s. 114-117
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Abstract
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- The current paradigm of star formation through accretion disks, and magnetohydrodynamically driven gas ejections, predicts the development of collimated outflows, rather than expansion without any preferential direction. We present radio continuum observations of the massive protostar W75N(B)-VLA 2, showing that it is a thermal, collimated ionized wind and that it has evolved in 18 years from a compact source into an elongated one. This is consistent with the evolution of the associated expanding water-vapor maser shell, which changed from a nearly circular morphology, tracing an almost isotropic outflow, to an elliptical one outlining collimated motions. We model this behavior in terms of an episodic, short-lived, originally isotropic ionized wind whose morphology evolves as it moves within a toroidal density stratification.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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- art (subject category)
- ref (subject category)
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Carrasco-Gonzale ...
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Torrelles, J. M.
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Canto, J.
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Curiel, S.
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Surcis, G.
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Vlemmings, Woute ...
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van Langevelde, ...
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Goddi, C.
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Anglada, G.
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Kim, S. W.
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Kim, J. S.
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Gomez, J. F.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Science
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Chalmers University of Technology