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Empirical H- and K-band Limb Darkening for 31 CHARA Stars: A Near-infrared Benchmark for Stellar-Atmosphere Models

  • Authors: Narsireddy Anugu, John D. Monnier, Antoine Mérand, Becky Flores, Alexandre Gallenne, Douglas R. Gies, Mayra Gutierrez, Robert Klement, Stefan Kraus, Jayadev Rajagopal, Rachael M. Roettenbacher, Gail H. Schaefer

Narsireddy Anugu et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 11.

Uniform-disk to limb-darkened diameter corrections in the H and K bands. For each target and band (H or K), the ordinate gives 100 (θ − θUD,b)/θUD,b, where θUD,b is the band-specific uniform-disk diameter and θ is either the empirical joint-fit power-law diameter, θPL, or the MPS2 fixed-CLV diameter, ﹩{\theta }_{{\rm{CLV}}}^{{\rm{MPS2}}}﹩. The correction is larger in H than in K, consistent with stronger limb darkening at shorter wavelengths. The empirical power-law and MPS2 fixed-CLV corrections are similar in amplitude, showing that the overall diameter correction is stable even where the limb-darkening coefficients differ between CHARA and the models.

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