uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Circumstellar Envelopes of OH/IR Stars
Show others and affiliations
2011 (English)In: Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants, 2011, Vol. 445Conference paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
2011. Vol. 445
, Astronomical Society of the Pacific Conference Series
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-170176OAI: oai:DiVA.org:uu-170176DiVA: diva2:508573
Astronomical Society of the Pacific Conference Series, 445
Available from: 2012-03-09 Created: 2012-03-09 Last updated: 2012-10-18

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Höfner, Susanne
By organisation
Theoretical Astrophysics
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

Total: 488 hits
ReferencesLink to record
Permanent link

Direct link