Only binary stars can help us actually SEE a stellar chromosphere

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DOIResolve DOI: http://doi.org/10.1017/S1743921307006163
AuthorSearch for:
EditorSearch for: Hartkopf, W. I.; Search for: Guinan, E. F.; Search for: Harmanec, P.
TypeArticle
Proceedings titleBinary Stars as Critical Tools & Tests in Contemporary Astrophysics
Series titleProceedings of the International Astronomical Union; Volume 2
ConferenceBinary Stars as Critical Tools & Tests in Contemporary Astrophysics. Symposium S240, August 22-25, 2006, Prague, Czech Republic
ISSN1743-9213
1743-9221
Pages700705; # of pages: 6
AbstractBinary stars of the ζ Aurigae type (eclipsing systems containing a cool giant plus a hot mainsequence star) offer a unique and highly effective method of probing a stellar chromosphere. Close to occultation the main-sequence star acts as a light probe behind the giant’s chromosphere, enabling an observer to detect changing conditions in that chromosphere along the line of sight. The technique is powerful, the effects dramatic. However, presently known eclipsing systems number only about 10, and a much greater sample is required for meaningful statistics of the properties of stellar chromospheres. New surveys of fainter binaries should be investigated for eclipses in order to gain more information on chromospheres in general. Such information is vital for modelling stellar photospheres, from which abundances are derived. This paper describes the very different behaviour of chromospheric material in three 3rd-magnitude giants.
Publication date
PublisherCambridge University Press
International Astronomical Union
LanguageEnglish
AffiliationNRC Herzberg Institute of Astrophysics; National Research Council Canada
Peer reviewedYes
NPARC number13053954
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Record identifierdece6167-4309-4c88-ac59-0a9b158c7766
Record created2009-11-25
Record modified2017-06-02
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