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ALMA view of the ci...
ALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD 101584
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- Olofsson, Hans, 1952 (author)
- Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43992 Onsala, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology
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- Vlemmings, Wouter, 1974 (author)
- Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43992 Onsala, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology
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- Maercker, Matthias, 1979 (author)
- Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43992 Onsala, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology,European Southern Observatory (ESO)
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- Lindqvist, Michael, 1960 (author)
- ESO, D-85748 Garching, Germany.,Chalmers tekniska högskola,Chalmers University of Technology
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- Lindqvist, M. (author)
- Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43992 Onsala, Sweden.
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- Nyman, L. (author)
- Joint ALMA Observ, Vitacura, Santiago De Chi, Chile.;ESO, Santiago, Chile.,Atacama Large Millimeter-submillimeter Array (ALMA),European Southern Observatory Santiago
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- Ramstedt, Sofia (author)
- Uppsala universitet,Teoretisk astrofysik,Uppsala University
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Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43992 Onsala, Sweden Chalmers tekniska högskola (creator_code:org_t)
- 2015-04-14
- 2015
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 576
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Abstract
Subject headings
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- Aims. We study the circumstellar evolution of the binary HD 101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. Methods. We used ALMA observations of the (CO)-C-12, (CO)-C-13, and (CO)-O-18 J = 2-1 lines and the 1.3 mm continuum to determine the morphology, kinematics, masses, and energetics of the circumstellar environment. Results. The circumstellar medium has a bipolar hour-glass structure, seen almost pole-on, formed by an energetic jet, approximate to 150 km s(-1). We conjecture that the circumstellar morphology is related to an event that took place approximate to 500 yr ago, possibly a capture event where the companion spiraled in towards the AGB star. However, the kinetic energy of the accelerated gas exceeds the released orbital energy, and, taking into account the expected energy transfer efficiency of the process, the observed phenomenon does not match current common-envelope scenarios. This suggests that another process must augment, or even dominate, the ejection process. A significant amount of material resides in an unresolved region, presumably in the equatorial plane of the binary system.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- circumstellar matter
- stars: individual: HD 101584
- stars: mass-loss
- stars: AGB and post-AGB
- radio lines: stars
Publication and Content Type
- ref (subject category)
- art (subject category)
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