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

C. R. Cowley | Zendy; G. C. L. Aikman | Zendy

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

Author(s) -

C. R. Cowley,

G. C. L. Aikman

Publication year - 1975

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/129801

Subject(s) - stars , mercury (programming language) , lambda , physics , manganese , spectral line , astrophysics , astronomy , materials science , optics , computer science , metallurgy , programming language

The isotopic shift of the Hg II \u3bb3984 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 \u3bb3984, based on the Hg I \u3bb4358 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.Peer reviewed: YesNRC publication: Ye

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