Semi-analytical formulas for the fundamental parameters of Galactic early B supergiants

TL;DR

This paper derives semi-analytical formulas for key physical parameters of Galactic early B supergiants, based on new calibration tables, enabling more precise estimations of their properties.

Contribution

It introduces new semi-analytical formulas for fundamental parameters of B0-B5 supergiants using updated calibration data, refining previous models.

Findings

Formulas for visual magnitude, radius, mass, luminosity, and surface gravity are provided.

The formulas are valid for temperatures between 15200K and 29700K.

Calibration tables improve the accuracy of parameter estimations.

Abstract

The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes $Ia$ and $Ib$ allow to particularize the eight parameters conjecture that model five fundamental parameters. The numerical expression for visual magnitude, radius, mass, luminosity and surface gravity are derived for supergiants in the range of temperature between 29700 and 15200. The presence of accurate tables of calibration allows us to introduce the efficiency of the derived formulas.