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First detection of ...
First detection of methanol towards a post-AGB object, HD 101584
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- Olofsson, Hans, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden
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- Vlemmings, Wouter, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden
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- Bergman, Per, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden
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- Humphreys, E. M. (author)
- European Southern Observatory (ESO),ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden
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- Lindqvist, Michael, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden
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- Maercker, Matthias, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nyman, L. (author)
- European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA),ESO, Alonso Cordova 3107, Santiago, Chile;Joint ALMA Observ, Alonso Cordova 3107, Vitacura, Santiago De Chi, Chile
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- Ramstedt, Sofia (author)
- Uppsala universitet,Teoretisk astrofysik
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- Tafoya Martinez, Daniel, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden
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(creator_code:org_t)
- 2017-07-11
- 2017
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 603, s. L2-
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Abstract
Subject headings
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- The circumstellar environments of objects on the asymptotic giant branch and beyond are rich in molecular species. Nevertheless, methanol has never been detected in such an object, and is therefore often taken as a clear signpost for a young stellar object. However, we report the first detection of CH3OH in a post-AGB object, HD 101584, using ALMA. Its emission, together with emissions from CO, SiO, SO, CS, and H2CO, comes from two extreme velocity spots on either side of the object where a high-velocity outflow appears to interact with the surrounding medium. We have derived molecular abundances, and propose that the detected molecular species are the effect of a post-shock chemistry where circumstellar grains play a role. We further provide evidence that HD 101584 was a low-mass, M-type AGB star.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Shock
- Millimeter Wavelengths
- stars: AGB and post-AGB
- Oxygen
- Isotopic-Ratios
- Star-Formation
- Outflow
- Different Chemical Type
- Line Survey
- Mass
- radio lines: stars
- Emission
- circumstellar matter
- stars: individual: HD 101584
- Rich Circumstellar Envelopes
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Olofsson, Hans, ...
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Vlemmings, Woute ...
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Bergman, Per, 19 ...
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Humphreys, E. M.
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Lindqvist, Micha ...
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Maercker, Matthi ...
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show more...
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Nyman, L.
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Ramstedt, Sofia
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Tafoya Martinez, ...
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- About the subject
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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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Astronomy and As ...
- By the university
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Chalmers University of Technology
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Uppsala University