Eppur binaria non `e esclusa: Pulsations in CZ Tuc appear to be tidally excited by its veiled companion

arXiv:2610.00471 · astro-ph.SR · Submitted 2026-09-30 · Read on arXiv

astro-ph.SR

Submitted: 2026-09-30

Updated: 2026-09-30

Code: https://github.com/jobovy/mwdust

Terminology

• Alignment — 4× in this paper · explained in 1 episode
• All Sky Automatic Survey — 1× in this paper
• Clustering — 1× in this paper · explained in 2 episodes
• European Space Agency — 1× in this paper
• Gaia Focused Product Release — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes

Sources

• New Grids of ATLAS9 Model Atmospheres
• Colour ratios of pulsation amplitudes in red giants
• Eppur binaria non 'e esclusa: Gaia astrometry does not disfavor a binary origin for Long Secondary Periods
• The All Sky Automated Survey
• The All Sky Automated Survey. Variable Stars in the 0h - 6h Quarter of the Southern Hemisphere
• Eppur si muove... On the Origin of Long Secondary Periods in Red Giant Stars
• The Optical Gravitational Lensing Experiment. Ellipsoidal Variability of Red Giants in the Large Magellanic Cloud
• The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. IV. Long-Period Variables in the Large Magellanic Cloud
• The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. XIII. Long-Period Variables in the Small Magellanic Cloud

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