Intensity interferometry can measure Red Clump star angular diameters to <1% precision in short exposures, providing independent validation for surface-brightness-color relations in the distance ladder.
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JWST TRGB distances to 10 SN Ia hosts update calibrations for 11 SNe yielding H0 of 68.4-69.6 km/s/Mpc and show modest shifts when combined with prior HST data.
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Validating the Angular Sizes of Red Clump Stars with Intensity Interferometry
Intensity interferometry can measure Red Clump star angular diameters to <1% precision in short exposures, providing independent validation for surface-brightness-color relations in the distance ladder.
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The Chicago Carnegie Hubble Program: Improving the Calibration of SNe Ia with JWST Measurements of the Tip of the Red Giant Branch
JWST TRGB distances to 10 SN Ia hosts update calibrations for 11 SNe yielding H0 of 68.4-69.6 km/s/Mpc and show modest shifts when combined with prior HST data.