Atmosphere tomography of red supergiant stars

3-D simulations suggest that the atmospheres of red supergiants are subject to large-amplitude convective motions, which are suspected to generate supersonic motions and shocks. We perform tomography of supergiant-star atmospheres, on temporal series of high-resolution spectra and on 3-D hydrodynami...

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Published inEAS publications series Vol. 60; pp. 85 - 92
Main Authors Lion, S., Van Eck, S., Chiavassa, A., Plez, B., Jorissen, A.
Format Journal Article
LanguageEnglish
Published Les Ulis EDP Sciences 2013
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ISBN2759809978
9782759809974
ISSN1633-4760
1638-1963
DOI10.1051/eas/1360009

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Summary:3-D simulations suggest that the atmospheres of red supergiants are subject to large-amplitude convective motions, which are suspected to generate supersonic motions and shocks. We perform tomography of supergiant-star atmospheres, on temporal series of high-resolution spectra and on 3-D hydrodynamical synthetic spectra. The tomographic technique is improved by the computation of the contribution function, which is used to construct numerical spectral masks probing different optical depths. This exploratory work allows us to put spatial and temporal constraints on velocity fields predicted by 3-D model atmospheres.
Bibliography:publisher-ID:eas1360009
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other:2013EAS....60...85L
ark:/67375/80W-0LHTHCJZ-4
PII:S1633476060000094
ObjectType-Article-1
SourceType-Scholarly Journals-1
content type line 14
ISBN:2759809978
9782759809974
ISSN:1633-4760
1638-1963
DOI:10.1051/eas/1360009