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2025RNAAS...9..142M - Research Notes of the AAS, 9, 142 (2025/June-0)

Determination of the Abundance of Mercury from the Hg II Line at 5677.10 Å. XXII. HD 144206 (υ Her).

MONIER R.

Abstract (from CDS):

The weak line of Hg II located at 5677.10 Å is detected in ELODIE spectra of the HgMn star HD 144206 as a feature absorbing about 2% of the continuum. The synthesis of this line yields a mercury abundance which is slightly larger than previous determinations. Line synthesis is used to measure the abundances of several elements. The following excesses/deficiencies are found: helium (-1.00 dex), magnesium (-0.47 dex), titanium (+0.91) , chromium (+0.54), manganese (+1.92), iron (-0.71) , yttrium (+2.50), mercury (+4.97). A conservative uncertainty on the excesses/deficiencies is estimated to be ±0.10 dex. The recent Transiting Exoplanet Survey Satellite lightcurves of HD 144206 acquired in 2022 and 2024 show a complex pattern of variability but no clear periodicity.

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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