Determination of stellar atmospheric parameters for a sample of the post-AGB stars

TL;DR

This study determines atmospheric parameters for 70 post-AGB stars using low-resolution optical spectra and empirical spectral feature relationships, providing new insights into these scarcely studied objects.

Contribution

First to derive atmospheric parameters for a sample of post-AGB stars using empirical spectral feature methods on low-resolution spectra.

Findings

Effective temperatures, gravities, and metallicities estimated for 70 stars.

Most objects are located toward the galactic south pole.

Sample includes mostly A-K spectral types with luminosities I and Ie.

Abstract

We report for the first time the stellar atmospheric parameters for a a set of post-AGB stars classified by Suarez et al. (2006). The stellar spectra were taken from optical region, with low-resolution and have different spectral ranges. We select a sample of 70 objects with A-K spectral types and luminosities I and Ie. The large majority of these objects have been scarcely studied and are located toward the galactic south pole region. We employ a set of empirical relationships that use pseudo-equivalent widths like spectral feature to estimate effective temperature, surface gravity and metallicity. The criteria chosen for selection of absorption are similar to employed by MK classification system.