Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Jurcsik, Johanna"'
Autor:
Jurcsik, Johanna, Hajdu, Gergely
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 increasing the overall accuracy of the fits and eliminating the system
Externí odkaz:
http://arxiv.org/abs/2308.08929
Autor:
Kovacs, Geza, Jurcsik, Johanna
Publikováno v:
A&A 678, A138 (2023)
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. For the 197 stars with multiple spectra we find overall [Fe/H] standa
Externí odkaz:
http://arxiv.org/abs/2308.06790
Autor:
Jurcsik, Johanna, Juhasz, Aron
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
Externí odkaz:
http://arxiv.org/abs/2209.11066
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 by Jurcsik and Kov\'acs (1996) and Smolec (2005), respectively. 293 R
Externí odkaz:
http://arxiv.org/abs/2105.05638
Autor:
Hajdu, Gergely, Pietrzyński, Grzegorz, Jurcsik, Johanna, Catelan, Márcio, Karczmarek, Paulina, Pilecki, Bogumił, Soszyński, Igor, Udalski, Andrzej, Thompson, Ian B.
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 ($O-C$) diagrams in the Galactic bulge time-series photometry of the Optical Gravitati
Externí odkaz:
http://arxiv.org/abs/2105.03750
Autor:
Jurcsik, Johanna
Blazhko stars from the extended $BVI_{\mathrm C}$ time series of RRab stars in the globular cluster, M3, are analysed. This is the largest sample of Blazhko stars with full details of their Blazhko properties in a homogeneous stellar system. Blazhko
Externí odkaz:
http://arxiv.org/abs/1909.02248
We analyzed the long and short cadence light curves of the Kepler non-Blazhko RRab stars. We prepared the Fourier spectra, the Fourier amplitude and phase variation functions, time-frequency representation, the O-C diagrams and their Fourier contents
Externí odkaz:
http://arxiv.org/abs/1903.08427
A systematic search for multi-mode Cepheids using the database of the ASAS-SN survey has led to the detection of thirteen new double-mode and two triple-mode Cepheids in the Galactic disk. These discoveries have increased the number of Galactic disk
Externí odkaz:
http://arxiv.org/abs/1812.01575
RR~Lyrae variables are widely used tracers of Galactic halo structure and kinematics, but they can also serve to constrain the distribution of the old stellar population in the Galactic bulge. With the aim of improving their near-infrared photometric
Externí odkaz:
http://arxiv.org/abs/1804.01456
Autor:
Jurcsik, Johanna
Publikováno v:
AIP Conf.Proc., 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 important results of Blazhko variables in 15 reviewed Jou
Externí odkaz:
http://arxiv.org/abs/0910.3359