Physical parameters of seven field RR Lyrae Stars in Bootes

TL;DR

This study presents detailed physical parameters of seven RR Lyrae stars in Bootes using Strömgren photometry, Fourier analysis, and atmospheric models, providing insights into their pulsation behavior and distances.

Contribution

It introduces a comprehensive analysis of seven RR Lyrae stars in Bootes using Fourier decomposition and empirical calibrations, which is novel for this specific stellar group.

Findings

Physical parameters estimated for each star.

Reddening in the region is negligible.

Distances to the stars are determined.

Abstract

Str\"omgren uvby-beta photometry is reported for the RR Lyrae stars AE, RS, ST, TV, TW, UU, and XX in Bootes. The physical parameters M/Mo, log (L/Lo), M_V, log T_eff and [Fe/H], have been estimated from the Fourier decomposition of the light curves and the empirical calibrations developed for this type of stars. Detailed behavior of the stars along the cycle of pulsation has been determined from the observed photometric indices and the synthetic indices from atmospheric models. The reddening of the zone is found to be negligible, as estimated from the reddening of several objects in the same region of the sky. Hence the distances to the individual objects are also estimated.