A study of the lambda 3984 feature in the mercury-manganese stars

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DOIResolve DOI: http://doi.org/10.1086/129801
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TypeArticle
Journal titlePublications of the Astronomical Society of the Pacific
ISSN0004-6280
Volume87
Pages513521; # of pages: 9
Subjectpeculiar stars; stellar abundances
AbstractThe isotopic shift of the Hg II λ3984 line is examined in the spectra of a number of strong mercury-manganese stars; the shift cannot be explained by line blending with lines of other elements in these stars, but represents real isotopic variations. An astrophysical log gf value - 1.8 is derived for λ3984, based on the Hg I λ4358 line strength in CrB and HR 1800. Elemental and (in some cases) isotopic abundances of Hg are derived using a spectrum synthesis technique; overabundances of up to 5.4 dex over the solar system over the solar system mercury abundance are found; the maximum overabundances may be temperature dependent.
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LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number14454
NPARC number21275033
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Record identifierb77e5351-a9d4-400e-8cfd-312da513e4ba
Record created2015-05-05
Record modified2016-05-09
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