Angular Diameters and Fundamental Parameters of Forty-Four Stars from the Navy Precision Optical Interferometer

TL;DR

This study measured the angular diameters of 44 stars using optical interferometry, deriving their physical parameters such as radius, temperature, and luminosity, primarily focusing on giant stars across spectral classes B to M.

Contribution

It provides precise angular diameters and fundamental stellar parameters for 44 stars, enhancing stellar characterization data with high accuracy measurements.

Findings

Angular diameters determined with 2% or less uncertainty.

Derived stellar radii, temperatures, and luminosities for a diverse star sample.

Data useful for calibrating stellar models and understanding stellar evolution.

Abstract

We measured the angular diameters of 44 stars with the Navy Precision Optical Interferometer, obtaining uncertainties on the limb darkened diameter of 2% or less for all but four stars. We then used our diameters with Gaia or Hipparcos parallaxes to calculate each star's physical radius. We gathered information from the literature to determine bolometric flux and luminosity, and combined that with our diameters to produce an effective temperature. Our sample consists of mostly giant stars, and spans a wide range of spectral classes from B to M.