Diameters and Temperatures VII: High-angular resolution measurements of Solar-type stars with the CHARA Array
- 1Louisiana State University
Abstract
We present interferometric measurements of angular diameters for 27 nearby solar-type stars obtained with the Precision Astronomical Visible Observations (PAVO) beam combiner at the CHARA Array. The sample spans a broad range of metallicities, includes several known exoplanet hosts, and covers evolutionary stages from the zero-age main sequence to mildly evolved subgiants. Uniform-disk and limb-darkened angular diameters were measured for each target and combined with bolometric fluxes and Gaia parallaxes to determine precise, model-independent stellar radii, effective temperatures, and luminosities. We achieve typical uncertainties of ∼1% in radius and ∼1.5% in effective temperature. Comparisons with multiple stellar evolutionary model grids yield mass and age estimates and enable assessment of grid-to-grid systematics, highlighting sensitivities to abundances, evolutionary stage, and proximity to grid boundaries. Our results provide empirical benchmarks for testing stellar evolutionary theory, refining surface brightness-color relations, and improving the characterization of exoplanet host stars.
Versions
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BibTeX
@article{boyajian2026diameters,
title = {{Diameters and Temperatures VII: High-angular resolution measurements of Solar-type stars with the CHARA Array}},
author = {Tabetha Boyajian and Ashley A. Elliott and Emelly D. Tiburcio and Kaspar von Braun and Gail Schaefer and Timothy R. White and Daniel Huber and Michael Ireland and Jeremy Jones and Tyler Ellis and Eliot Hiegel},
journal = {The Open Journal of Astrophysics},
year = {2026},
month = oct,
doi = {10.33232/001c.172090},
url = {https://astro.theoj.org/article/172090-diameters-and-temperatures-vii-high-angular-resolution-measurements-of-solar-type-stars-with-the-chara-array},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Diameters and Temperatures VII: High-angular resolution measurements of Solar-type stars with the CHARA Array
AU - Tabetha Boyajian
AU - Ashley A. Elliott
AU - Emelly D. Tiburcio
AU - Kaspar von Braun
AU - Gail Schaefer
AU - Timothy R. White
AU - Daniel Huber
AU - Michael Ireland
AU - Jeremy Jones
AU - Tyler Ellis
AU - Eliot Hiegel
PY - 2026
DA - 2026/10/05
JO - The Open Journal of Astrophysics
DO - 10.33232/001c.172090
UR - https://astro.theoj.org/article/172090-diameters-and-temperatures-vii-high-angular-resolution-measurements-of-solar-type-stars-with-the-chara-array
AB - We present interferometric measurements of angular diameters for 27 nearby solar-type stars obtained with the Precision Astronomical Visible Observations (PAVO) beam combiner at the CHARA Array. The sample spans a broad range of metallicities, includes several known exoplanet hosts, and covers evolutionary stages from the zero-age main sequence to mildly evolved subgiants. Uniform-disk and limb-darkened angular diameters were measured for each target and combined with bolometric fluxes and Gaia parallaxes to determine precise, model-independent stellar radii, effective temperatures, and luminosities. We achieve typical uncertainties of ∼1% in radius and ∼1.5% in effective temperature. Comparisons with multiple stellar evolutionary model grids yield mass and age estimates and enable assessment of grid-to-grid systematics, highlighting sensitivities to abundances, evolutionary stage, and proximity to grid boundaries. Our results provide empirical benchmarks for testing stellar evolutionary theory, refining surface brightness-color relations, and improving the characterization of exoplanet host stars.
SN - 2565-6120
ER -