58 citations · 703 across the 36 of their papers we have counts for
36 papers
RR Lyrae stars with variable mean magnitudes
Gergely Hajdu, Johanna Jurcsik, Márcio Catelan +6
Context. A number of RR Lyrae stars show variable mean magnitudes in the OGLE survey light curves of the Galactic bulge. Hitherto this phenomenon was not studied, as it was general…
Photometric metallicities of fundamental-mode RR Lyr stars from Gaia -band photometry of globular-cluster variables
Johanna Jurcsik, Gergely Hajdu
Photometric metallicity formulae of fundamental-mode RR Lyr (RRab) stars are presented using globular-cluster data exclusively. The aim is to check whether this selection may help…
Toward more accurate RR Lyrae metallicities
Geza Kovacs, Johanna Jurcsik
By using a large sample of published spectroscopic iron abundances, we point out the importance of gravity correction in deriving more accurate metal abundances for RR Lyrae stars.…
RRab variables with identical light-curve shapes at different pulsation periods
Johanna Jurcsik, Aron Juhasz
In this paper, we report on the detection of RRab stars with quasi-identical-shape light curves but period differences as large as d using the Galactic bulge data of th…
Studies of RR Lyrae Variables in Binary Systems. I.: Evidence of a Trimodal Companion Mass Distribution
Gergely Hajdu, Grzegorz Pietrzyński, Johanna Jurcsik +6
We present 87 candidates for RR Lyrae variable stars in binary systems, based on our new search using the light-travel time effect (LTTE) and observed - calculated () diagrams…
On the photometric metallicity of Oosterhoff-type I and II RRab stars
Johanna Jurcsik, Gergely Hajdu, Áron Juhász
We are revising the consistency of photometric metallicity formulae widely used for fundamental-mode RR Lyrae (RRab) variables, based on their V- and I-band light curves, published…