First detection of methanol towards a post-AGB object, HD 101584

Olofsson, Hans, 1952 (author): Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden

Vlemmings, Wouter, 1974 (author): Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden

Bergman, Per, 1960 (author): Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden

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

Lindqvist, Michael, 1960 (author): Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden

Maercker, Matthias, 1979 (author): Chalmers tekniska högskola,Chalmers University of Technology

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

Tafoya Martinez, Daniel, 1981 (author): Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden

(creator_code:org_t)

2017-07-11
2017
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 603, s. L2-

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Abstract Subject headings

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.

NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

By the author/editor: Olofsson, Hans, ...; Vlemmings, Woute ...; Bergman, Per, 19 ...; Humphreys, E. M.; Lindqvist, Micha ...; Maercker, Matthi ...; show more...; Nyman, L.; Ramstedt, Sofia; Tafoya Martinez, ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

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