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Discovery of a comp...
Discovery of a complex spiral-shell structure around the oxygen-rich AGB star GX Monocerotis
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- Randall, S. K. (författare)
- ESO, Karl Schwarzschild Str 2, Garching 85748, Germany.
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- Trejo, A. (författare)
- Acad Sinica Inst Astron & Astrophys ASIAA, 11F Astron Math Bldg,AS NTU 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan.
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- Humphreys, E. M. L. (författare)
- ESO, Karl Schwarzschild Str 2, Garching 85748, Germany.;Joint ALMA Observ, Alonso Cordova 3107, Santiago 7630355, Chile.
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- Kim, H. (författare)
- Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea.
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- Wittkowski, M. (författare)
- ESO, Karl Schwarzschild Str 2, Garching 85748, Germany.
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- Boboltz, D. (författare)
- Natl Sci Fdn, 2415 Eisenhower Ave, Alexandria, VA 22314 USA.
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- Ramstedt, Sofia (författare)
- Uppsala universitet,Teoretisk astrofysik
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ESO, Karl Schwarzschild Str 2, Garching 85748, Germany Acad Sinica Inst Astron & Astrophys ASIAA, 11F Astron Math Bldg,AS NTU 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan. (creator_code:org_t)
- 2020-04-29
- 2020
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP SCIENCES S A. - 0004-6361 .- 1432-0746. ; 636
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The circumstellar envelopes of asymptotic giant branch (AGB) stars exhibit a wide range of morphologies and chemical compositions that can be exploited to unravel their mass-loss history as well as binary status. Here, we present ALMA Band 6 observations centred upon the oxygen-rich, high mass-loss rate AGB star GX Mon. The resulting CO (2-1) map reveals an intricate, complex circumstellar spiral-arc structure consistent with hydrodynamical models for an AGB experiencing mass loss in a highly eccentric, close binary system with an orbital period of around 140 years. Several other transitions (including SiO, SiS, SO2, and CS) are detected in the data, however only the SO (5-4) map shows a similar - although much weaker - distribution as imaged for the CO.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- astrochemistry
- stars: AGB and post-AGB
- stars: mass-loss
- circumstellar matter
- submillimeter: stars
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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