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 …

Abstract The Transiting Exoplanet Survey Satellite (TESS) space telescope is collecting
continuous, high-precision optical photometry of stars throughout the sky, including …

We present a sample of 135,873 RR Lyrae stars (RRLs) with precise photometric metallicity
and distance estimates from our newly calibrated P–ϕ 31–R 21–[Fe/H]/P–R 21–[Fe/H] and G …

We discuss the largest and most homogeneous spectroscopic data set of field RR Lyrae
variables (RRLs) available to date. We estimated abundances using both high-resolution …

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 provide uniform RR Lyrae-based distances to 39 dwarf galaxies in and around the Local
Group. We determine distances based on a Bayesian hierarchical model that uses periods …

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 …

The globular cluster Messier 80 was monitored by the Kepler space telescope for 80 days
during the K2 mission. Continuous, high-precision photometry of such an old, compact …

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 …