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2025RNAAS...9..217M - Research Notes of the AAS, 9, 217 (2025/August-0)

Determination of the Abundance of Mercury from the Hg II Line at 5677.10 Å. XXIV. HD 27376 (41 Eri).

MONIER R.

Abstract (from CDS):

The weak line of Hg II located at 5677.10 Å is detected in a FEROS spectrum of the SB2 star HD 27376 as a feature absorbing about 1% of the continuum. The synthesis of this line yields a mercury abundance which is slightly lower than the abundance derived from the 3983.93 Å line. Line synthesis is used to measure the abundances of sixteen elements for the first time for one of the components, arbitrarily called HD 27376 A. The following excesses/deficiencies are found: helium (-0.92 dex), carbon (-0.22), oxygen (-0.15), magnesium (0.00), aluminum (-1.30), silicon (0.00), phosphorus (+1.48), sulfur (-0.52), titanium (0.48), chromium (0.40), manganese (1.40), iron (0.30), gallium (+2.78), xenon (+3.85), baryum (0.00) and mercury (+4.85). A conservative uncertainty on the excesses/deficiencies is estimated to be ±0.10 dex. The HgMn status of this star is reinforced.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Chemically peculiar stars - Mercury-manganese stars

Simbad objects: 1

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