Determinationm of Effective Temperatures and Luminosities of Rotating Stars

TL;DR

This paper develops a method to compute spectral energy distributions of rotating stars, accounting for inclination effects, to better infer their true luminosities and effective temperatures.

Contribution

It introduces a comprehensive approach combining 2D stellar models and atmosphere calculations to analyze the impact of rotation on observed stellar properties.

Findings

Spectral energy distributions vary with inclination angle.

Rotation affects the inferred luminosity and temperature.

Method improves accuracy of stellar parameter estimation.

Abstract

Spectral energy distributions for models of arbitrarily rotating stars are computed using two dimensional rotating stellar models, NLTE plane parallel model atmospheres, and a code to integrate the appropriately weighted intensities over the visible surface of the stellar disk. The spectral energy distributions depend on the inclination angle between the observer and the rotation axis of the model. We use these curves to deduce what one would infer the model's luminosity and effective temperature to be assuming the object was nonrotating.