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Evolved Stars with Complex Atmospheres - the High Spectral Resolution, mid-IR View
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- Ryde, N. (author)
- Lund Univ, Lund Observ, Dept Astron & Theoret Phys, Lund, Sweden.
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- Lambert, J. (author)
- Lund Univ, Lund Observ, Dept Astron & Theoret Phys, Lund, Sweden.
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- Richter, M. J. (author)
- Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
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- Lund Univ, Lund Observ, Dept Astron & Theoret Phys, Lund, Sweden Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. (creator_code:org_t)
- ASTRONOMICAL SOC PACIFIC, 2015
- 2015
- English.
- In: Why galaxies care about AGB stars III. - : ASTRONOMICAL SOC PACIFIC. - 9781583818794 - 9781583818787 ; , s. 67-71
- Conference paper (peer-reviewed)
Abstract
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- The physical structures of the outer atmospheres of red giants are not known. They are certainly complex, and a range of recent observations are showing that we need to embrace non-classical model atmospheres to interpret these regions. This region's properties are of importance, not the least for an understanding of the mass-loss mechanism for these stars. Here we present observational constraints on the outer regions of red giants, based on mid-IR, high spectral resolution spectra. We also discuss possible non-LTE effects and highlight a new non-LTE code that will be used to analyse the spectra of these atmospheric layers. We conclude by mentioning our new SOFIA/EXES observations of red giants at 67 mu m, where the vibration-rotation lines of water vapour can be detected and spectrally resolved for the first time.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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- ref (subject category)
- kon (subject category)
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- Ryde, N.
- Lambert, J.
- Richter, M. J.
- Josselin, E.
- Harper, G. M.
- Eriksson, Kjell
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- Boogert, A.
- DeWitt, C.
- Encrenaz, T.
- Greathouse, T.
- Jaffe, D.
- Kulas, K.
- McKelvey, M.
- Najita, J.
- Vacca, W.
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- Uppsala University
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