Low resolution spectroscopic investigation of Am stars using Automated method

TL;DR

This study applies an automated full spectrum fitting method to low-resolution spectra of Am stars to reliably estimate their atmospheric parameters, extending the technique's applicability to chemically peculiar stars.

Contribution

It demonstrates the robustness of the automated spectral fitting method for Am stars, a chemically peculiar class, using low-resolution spectra and compares results with high-resolution data.

Findings

Teff and logg estimates agree with high-resolution spectroscopy

Method is effective for chemically peculiar Am stars

Extends spectral fitting technique to cooler and peculiar stars

Abstract

Automated method of full spectrum fitting gives reliable estimates of stellar atmospheric parameters (Teff, logg and [Fe/H]) for late A, F, G and early K type stars. Recently, the technique was further improved in the cooler regime and the validity range was extended up to M6 - M7 spectral type( Teff $\sim\,2900$ K). The present study aims to explore the application of this method on the low-resolution spectra of Am stars, a class of chemically peculiar (CP) stars, to examine its robustness for these objects. We use ULySS with MILES (Medium-resolution INT Library of Empirical Spectra) V2 spectral interpolator for parameter determination. Determined Teff and logg are found to be in good agreement with those obtained from high-resolution spectroscopy.