SPHERE/ZIMPOL observations of 47 Cepheids detect companions in 17% of the sample, confirm known ones, reveal new wide components in three stars, and set 5-sigma contrast limits that exclude main-sequence companions more massive than late-K dwarfs beyond 0.5 arcsec for a subset.
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The local Hubble constant is measured as 73.04 ± 1.04 km/s/Mpc from Cepheid-calibrated Type Ia supernovae, showing a 5-sigma discrepancy with the Planck+LCDM prediction.
citing papers explorer
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High-contrast imaging of Galactic Cepheids with VLT/SPHERE
SPHERE/ZIMPOL observations of 47 Cepheids detect companions in 17% of the sample, confirm known ones, reveal new wide components in three stars, and set 5-sigma contrast limits that exclude main-sequence companions more massive than late-K dwarfs beyond 0.5 arcsec for a subset.
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A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
The local Hubble constant is measured as 73.04 ± 1.04 km/s/Mpc from Cepheid-calibrated Type Ia supernovae, showing a 5-sigma discrepancy with the Planck+LCDM prediction.