Abstract
view Abstract Citations (8) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Heavy elements in the peculiar A star HD 25354. Pyper, D. M. ; Hartoog, M. R. Abstract The spectrum of the Sr-Cr-Eu Ap star HD 25354 shows strong lines of Eu ii, Dy ii, Ce ii, Nd ii, and Sm ii. Lines of Hg ii and Pt ii are probably present, and U ii is possibly present but very weak. Our results disagree with an earlier line identification of HD 25354 by Jaschek and Brandi in that we find no Th, Am, or Cm lines, and in that Ho lines are not unusually strong on our spectrograms. The apparent overabundances of Hg and Pt in HD 25354 as well as in several other Ap stars of the Cr-Eu type may imply that these stars represent a transition between two groups: Ap stars having abundance anomalies in Si, Fe-peak elements, and the rare earth elements; and the Hg-Mn Ap stars. Subject headings: abundances, stellar - line identifications - peculiar A stars - stars, individual Publication: The Astrophysical Journal Pub Date: June 1975 DOI: 10.1086/153633 Bibcode: 1975ApJ...198..555P full text sources ADS | data products SIMBAD (1)
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