Elemental abundance analyses with coadded DAO spectrograms – V. The mercury–manganese stars Phi Herculis, 28 Herculis and HR 7664
Open Access
- 1 December 1988
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 235 (3) , 763-785
- https://doi.org/10.1093/mnras/235.3.763
Abstract
Elemental abundance analyses of three mercury–manganese stars were performed in a manner consistent with previous analyses of this series. A few correlations are found between the derived abundances and with the effective temperature in accordance with the expectations of radiative diffusion explanations of the derived abundances. The helium abundances are smaller than the value required to sustain the superficial helium convection zone in the atmospheres of these stars.Keywords
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