We discuss the use and importance of pulsating variable stars as population tracers in Local
Group galaxies. Among bright variable crossing the classical instability strip, we mostly focus …

We review the phenomenology of classical Cepheids (CCs), Anomalous Cepheids (ACs)
and type II Cepheids (TIICs) in the Milky Way (MW) and in the Magellanic Clouds (MCs). We …

We report the discovery of high-velocity candidates among RR Lyrae stars found in the Milky
Way halo. We identified nine RR Lyrae stars with Galactocentric velocities exceeding the …

We present new period-ϕ 31-[Fe/H] relations for first-overtone RRL stars (RRc), calibrated
over a broad range of metallicities (− 2.5≲[Fe/H]≲ 0.0) using the largest currently available …

We investigate the properties of the mixed-mode (RRd) RR Lyrae (RRL) variables in the
Fornax dwarf spheroidal (dSph) galaxy by using B-and V-band time series collected over 24 …

We present new empirical infrared period–luminosity–metallicity (PLZ) and period–
Wesenheit–metallicity (PWZ) relations for RR Lyae based on the latest Gaia Early Data …

We present new and relations for fundamental mode (RRab) and first-overtone mode (RRc)
RR Lyrae stars (RRLs), respectively. The relations were calibrated based on pulsation …

We have performed a critical evaluation of the membership status of all variable stars in
globular clusters recorded in the Catalogue of Variable Stars in Globular Clusters (CVSGC) …

This investigation is mainly focused on the LSST Survey Strategy Optimization process, a
bottom-up approach that turned out to be quite effective in involving the scientific community …

ABSTRACT We use 3653 (2661 RRab, 992 RRc) RR Lyrae stars (RRLs) with 7D (3D
position, 3D velocity, and metallicity) information selected from Sloan Digital Sky Survey …