Fundamental parameters of some B-type stars using NOAO Indo-U.S. Library

TL;DR

This study provides a detailed spectroscopic analysis of 83 B-type stars, determining their fundamental parameters using advanced models and methods, and compares results with previous research for validation.

Contribution

Introduces a comprehensive spectroscopic analysis of B-type stars using BCD and LTE/NLTE models, offering improved accuracy over prior studies.

Findings

Consistent effective temperatures and surface gravities with previous studies.

Accurate rotational velocity measurements from Mg II line fitting.

Estimated evolutionary masses align well with existing models.

Abstract

In the present article, we present a spectroscopic analysis of 83 field B-type stars from NOAO Indo-U.S. Library. We calculated the fundamental parameters e.g effective temperatures, surface gravities, and rotational velocities using Barbier-Chalonge-Divan (BCD) method and line blanketed LTE/NLTE model atmospheres. The projected rotational velocity was estimated by fitting the Mg II4481 {\AA} line profile with theoretical lines calculated from LTE/NLTE models. The evolutionary masses for the program stars are estimated using the evolutionary models. In most of the cases, the present study gives fair agreement with earlier investigations and is even more accurate in some cases.