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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2 Pith papers cite this work. Polarity classification is still indexing.
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astro-ph.SR 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Speckle imaging of 81 RR Lyrae stars detects 10 likely bound companions at 20-220 AU separations, yielding a binary fraction estimate above 12 percent.
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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Finding the elusive RR Lyrae companions via speckle imaging
Speckle imaging of 81 RR Lyrae stars detects 10 likely bound companions at 20-220 AU separations, yielding a binary fraction estimate above 12 percent.