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Circumstellar Envel...
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Ruiz-Velasco, A. E.
(author)
Circumstellar Envelopes of OH/IR Stars
- Article/chapterEnglish2011
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LIBRIS-ID:oai:DiVA.org:uu-170176
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-170176URI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:kon swepub-publicationtype
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We present VLTI observations of the tip-AGB star IRAS 17020-5254 carried out with the AMBER and MIDI instruments using the 1.8-m Auxiliary Telescopes (ATs) with three different baselines. This star is an evolved oxygen-rich single star of the OH/IR type. We fit the resulting near-infrared visibilities with a model consisting of a Gaussian component plus a central uniform disk, obtaining apparent diameters of the dust shell, the central star, and their flux ratios. We also show the uniform disk diameter as a function of wavelength from both the AMBER and MIDI observations. The mid-infrared diameter is about two to three times larger than the near-infrared one. We plan to compare these data to hydrodynamic atmosphere and wind models.
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Wittkowski, M.
(author)
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Driebe, T.
(author)
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Wachter, A.
(author)
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Höfner, SusanneUppsala universitet,Teoretisk astrofysik(Swepub:uu)sho27173
(author)
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Uppsala universitetTeoretisk astrofysik
(creator_code:org_t)
Related titles
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In:Why Galaxies Care about AGB Stars II
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