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astro-ph.SR2026
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: X First spectroscopic characterization of Galactic Type II Cepheids and calibration of the Period-Wesenheit-Metallicity relations
T. Sicignano, M. Romaniello, A. Bhardwaj +13
Type II Cepheids (T2Cs) are Population II pulsating stars that serve as distance indicators through their period--luminosity relation. Along with RR Lyrae stars and the tip of the…
astro-ph.SR2026
Classical Cepheids in the JWST and Roman Era: A New Theoretical Framework and its Metallicity Dependence
Giulia De Somma, Marcella Marconi, Vincenzo Ripepi +7
Classical Cepheids are fundamental distance indicators that anchor the cosmic distance ladder through their Period-Luminosity, Period-Luminosity-Color, and Period-Wesenheit relatio…