New Results of the Konkoly Blazhko Group (2009)
During the recent years the Konkoly Blazhko Group (PIs Johanna Jurcsik and B\'ela Szeidl, co-workers \'Ad\'am S\'odor, Zsombor Hurta and several undergraduate, graduate students) published new...
On the distribution of the modulation frequencies of RR Lyrae stars (2005)
Jurcsik, Johanna, Szeidl, Béla, Nagy, Andrea, Sódor, Ádám
For the first time connection between the pulsation and modulation properties of RR Lyrae stars has been detected. Based on the available data it is found that the possible range of the modulation...
The metallicity range of variables in M3 (2003)
The recently published spectroscopic metallicities of RR Lyrae stars in M3 (Sandstrom, K., Pilachowski, C. A., and Saha, A. 2001, AJ 122, 3212) though show a relatively wide range of the [Fe/H]...
Period changes in omega Centauri RR Lyrae stars (2000)
Jurcsik, Johanna, Clement, Christine, Geyer, Edward H., Domsa, Istvan
A century of observations of omega Centauri allows us to accurately follow the period changes of a large sample of variable stars. Although the period changes are composed of monotone and irregular...
Identification and astrometry of variables in M3 (2000)
Bakos, Gáspár Á., Benkő, József M., Jurcsik, Johanna
We present identification and astrometry of all previously known or suspected variables along with the discovery of six new variables in the globular cluster M3. The number of the catalogized...
Spatial metallicity asymmetry in $\omega$ Centauri (1998)
Jurcsik, Johanna, Observatory, Konkoly
The compilation of the metallicity values of $\omega$~Centauri stars led to detection of spatial asymmetry in the metallicity distribution of the bright giants. It was found that the most and least...
On the Light Curve - Luminosity Relation of RR Lyrae Stars (1996)
Kovacs, Geza, Jurcsik, Johanna
We use a large sample of RRab stars in globular clusters and in the Sculptor dwarf galaxy to decipher the relation between the Fourier decomposition and the luminosity. For fixing the zero point of...