The Valuable Long-period Cluster Cepheid KQ Scorpii and other Calibration Candidates

2024/08/06 by D. Majaess, Majaess, Daniel, D. G. Turner +7 · 1 citation
Materials Science · Physics and Astronomy · #Astro and Planetary Science #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Crystal Structures and Properties #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR)

paper · pdf · doi:10.48550/arxiv.2408.03371

openalex publication_date 2024/08/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The classical Cepheid KQ Sco is a valuable anchor for the distance scale because of its long pulsation period (28^{\rm d}.7) and evidence implying membership in the open cluster UBC 1558. Analyses tied to Gaia DR3 astrometry, photometry, spectroscopy, radial velocities, and 2MASS-VVV photometry indicate a common distance of 2.15±0.15 kpc (\citealtlin21 DR3 corrections applied). Additional cluster Cepheid candidates requiring follow-up are identified, and it's suggested that a team of international researchers could maintain a cluster Cepheid database to guide the broader community to cases where consensus exists.

Cited by

• Gaia DR3 Open Cluster Cepheids: A Unified Catalog with Calibrated Period-Age and Period-Wesenheit Relations

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