Elemental abundances of HD 87240, member of the young open cluster NGC 3114

TL;DR

This study analyzes the chemical composition of HD 87240, a star in NGC 3114, revealing significant overabundances of heavy elements and classifying it as a chemically peculiar late B star.

Contribution

The paper provides detailed elemental abundance measurements of HD 87240 using spectral synthesis and identifies it as a SiPtHg type chemically peculiar star.

Findings

Underabundance of light elements

Overabundance of heavy elements, especially Rare Earths, platinum, and mercury

Classification as a Chemically Peculiar late B star

Abstract

We have determined the abundances of several chemical elements in the atmosphere of HD 87240, a member of the young open cluster NGC 3114. We have used the code ATLAS9 to compute a model atmosphere for HD 87240 for the effective temperature and surface gravity derived from Stromgren's photometry A grid of synthetic spectra has been computed using SYNSPEC49 and adjusted to the UVES spectrum of HD 87240 to determine the abundances of several chemical elements using the latest critically evaluated atomic data from NIST. We find underabundances of light elements and large overabundances of heavy elements, in particular of the Rare Earths, platinum and mercury which suggest that this star is a Chemically Peculiar late B star of the SiPtHg type.