Refined Chemical Abundances of Pi Dra and HR 7545 with ATLAS12

TL;DR

This study refines the chemical abundances of certain elements in Pi Dra and HR 7545 using the ATLAS12 model, comparing it with ATLAS9, and finds consistent results supporting the use of ATLAS9 for similar stars.

Contribution

It demonstrates that ATLAS9 can reliably be used for abundance analysis of slowly rotating chemically peculiar stars, validated against the more detailed ATLAS12 model.

Findings

Abundances from ATLAS9 and ATLAS12 agree within uncertainties.

ATLAS9 is suitable for chemically peculiar stars analysis.

Refined elemental abundances for Pi Dra and HR 7545.

Abstract

We present the more refined abundances of elements (C, O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Zn, Sr, Y, Zr and Ba) determined using the computationally intensive ATLAS12 atmosphere model for the metallic-line stars Pi Dra and HR 7545. We compare the chemical abundances derived from ATLAS9 model atmosphere with those of derived from ATLAS12. The abundances are in agreement with each other, within their uncertainties. We thus state that ATLAS9 may be used for the abundance analysis of slowly rotating chemically peculiar stars, such as Pi Dra and HR 7545.