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Observational ident...
Observational identification of a sample of likely recent common-envelope events
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- Khouri, Theo, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Vlemmings, Wouter, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Tafoya, Daniel, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- Perez-Sanchez, A. F. (författare)
- Universiteit Leiden (UL),Leiden University (UL)
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- Contreras, C. S. (författare)
- Centro de Astrobiologia (CAB)
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- Gomez, J. F. (författare)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Imai, Hiroshi (författare)
- Kagoshima University
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Sahai, R. (författare)
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visa färre...
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(creator_code:org_t)
- 2021-12-16
- 2022
- Engelska.
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Ingår i: Nature Astronomy. - : Springer Science and Business Media LLC. - 2397-3366. ; 6:2, s. 275-286
- Relaterad länk:
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http://arxiv.org/pdf...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- One of the most poorly understood stellar evolutionary paths is that of binary systems undergoing common-envelope evolution, when the envelope of a giant star engulfs the orbit of a companion. The interaction that ensues leads to a great variety of astrophysical systems and associated phenomena, but happens over a very short timescale. Unfortunately, direct empirical studies of this momentous and complex phase are difficult at present because few objects experiencing, or having just experienced, common-envelope evolution are known. Here we present Atacama Large Millimeter/submillimeter Array observations of minor CO isotopologues towards a sample of sources known as water fountains, which reveal that almost all of them recently lost a substantial fraction of their initial mass over a timescale of less than a few tens to a few hundreds of years. The only known mechanism able to explain such rapid mass ejection, corresponding to a large fraction of the stellar mass, is the common-envelope evolution. A stellar population analysis shows that the number of water-fountain sources in the Milky Way is comparable to the expected number of common-envelope events that involve low-mass evolved stars. Thus, the known sample of water-fountain sources accounts for a large fraction of the systems undergoing a common-envelope phase in our Galaxy. As one of the distinguishing characteristics of water-fountain sources is their fast bipolar outflow, we conclude that outflows and jets play an important role right before, during or immediately after the common-envelope phase.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
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Khouri, Theo, 19 ...
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Vlemmings, Woute ...
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Tafoya, Daniel, ...
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Perez-Sanchez, A ...
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Contreras, C. S.
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Gomez, J. F.
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visa fler...
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Imai, Hiroshi
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Sahai, R.
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visa färre...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Astronomi astrof ...
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NATURVETENSKAP
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och Geovetenskap och ...
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och Geokemi
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NATURVETENSKAP
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Nature Astronomy
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Chalmers tekniska högskola