In this paper, we report on the detection of RRab stars with quasi-identical-shape light curves but period differences as large as 0.05–0.21 d using the Galactic bulge data of the OGLE-IV survey. We have examined stars with shorter periods than the Oosterhoff I ridge of the bulge. These stars generally have smaller amplitudes and larger Fourier phase-differences than the typical bulge RRab stars have at the same period. Many of these ‘anomalous’ stars have good-quality light curves without any sign of the Blazhko modulation. Examining their Fourier parameters revealed that several of these stars show very similar light curve to the typical bulge RR Lyrae. We found hundreds of quasi-identical-shape light-curve pairs with different periods be...
We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with speci...
We are revising the consistency of photometric metallicity formulae widely used for fundamental-mode...
Fourier decompositions have been made of the light curves of a large sample of RR Lyrae field stars....
In this paper, we report on the detection of RRab stars with quasi-identical-shape light curves but ...
We present an analysis of the period-V-amplitude plane for RR0 Lyrae stars (fundamental mode pulsato...
An examination of the period-V amplitude relation for RRab stars (fundamental mode pulsators) with `...
Fourier decompositions are performed for the light curves of six RRab and 3 RRc field stars. These a...
In an extended photometric campaign of RR Lyrae variables of the globular cluster M3, an aberrant-li...
A systematic survey to establish the true incidence rate of Blazhko modulation among short-period, f...
We present the first paper of a series focused on the Blazhko effect in RR Lyrae type stars pulsatin...
We present an upgrade of the OGLE Collection of RR Lyrae stars in the Galactic bulge and disk. The s...
The OGLE database is revisited to investigate in more detail the properties of the Fourier parameter...
VR light curve3 have been obtained for 16 faint variable stars with periods shorter than 1 day. Alth...
We examine the light curves of 61 RRab stars from the data of Lub (1977). Fourier decomposition coef...
We report up to 5000 days of VRI photometry, from a robotic photometric telescope, of 34 pulsating r...
We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with speci...
We are revising the consistency of photometric metallicity formulae widely used for fundamental-mode...
Fourier decompositions have been made of the light curves of a large sample of RR Lyrae field stars....
In this paper, we report on the detection of RRab stars with quasi-identical-shape light curves but ...
We present an analysis of the period-V-amplitude plane for RR0 Lyrae stars (fundamental mode pulsato...
An examination of the period-V amplitude relation for RRab stars (fundamental mode pulsators) with `...
Fourier decompositions are performed for the light curves of six RRab and 3 RRc field stars. These a...
In an extended photometric campaign of RR Lyrae variables of the globular cluster M3, an aberrant-li...
A systematic survey to establish the true incidence rate of Blazhko modulation among short-period, f...
We present the first paper of a series focused on the Blazhko effect in RR Lyrae type stars pulsatin...
We present an upgrade of the OGLE Collection of RR Lyrae stars in the Galactic bulge and disk. The s...
The OGLE database is revisited to investigate in more detail the properties of the Fourier parameter...
VR light curve3 have been obtained for 16 faint variable stars with periods shorter than 1 day. Alth...
We examine the light curves of 61 RRab stars from the data of Lub (1977). Fourier decomposition coef...
We report up to 5000 days of VRI photometry, from a robotic photometric telescope, of 34 pulsating r...
We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with speci...
We are revising the consistency of photometric metallicity formulae widely used for fundamental-mode...
Fourier decompositions have been made of the light curves of a large sample of RR Lyrae field stars....