HD 30963: a new HgMn star

TL;DR

This paper reports the discovery that HD 30963, previously classified as a normal B9 star, is actually a chemically peculiar HgMn star with significant elemental overabundances and underabundances, based on high-resolution spectral analysis.

Contribution

The study identifies HD 30963 as a new HgMn star, providing detailed spectral evidence of its chemical peculiarities and proposing a reclassification.

Findings

HD 30963 exhibits large overabundances of Mn, Sr, Y, Zr, Pt, and Hg.

The star shows pronounced underabundances of He and Ni.

Spectral analysis confirms its classification as a HgMn star.

Abstract

Using high dispersion high quality spectra of HD 30963 obtained with the echelle spectrograph SOPHIE at Observatoire de Haute Provence in November 2015, we show that this star, hitherto classified as a B9 III superficially normal star, is actually a new Chemically Peculiar star of the HgMn type. Spectrum synthesis reveals large overabundances of Mn, Sr, Y, Zr , Pt and Hg and pronounced underabundances of He and Ni which are characteristic of HgMn stars. We therefore propose that this interesting object be reclassified as a B9 HgMn star.