95 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Konkoly ObservatoryHU10 papers
- HUN-REN Research Centre for Astronomy and Earth SciencesHU8 papers
- Center for Astrophysics Harvard & SmithsonianUS4 papers
- Hungarian Academy of SciencesHU4 papers
- Max Planck Institute for ChemistryDE4 papers
- J. Selye UniversitySK3 papers
- Max Planck Institute for Solar System ResearchDE3 papers
- Australian National UniversityAU2 papers
- Camosun CollegeCA2 papers
- Eötvös Loránd UniversityHU2 papers
- Harvard UniversityUS2 papers
- KU LeuvenBE2 papers
28 papers
Turbulent dynamo in the terrestrial magnetosheath
Zoltán Vörös, Owen Wyn Roberts, Yasuhito Narita +10
Dynamo action refers to energy exchange processes through which magnetic fields are generated at the expense of kinetic energy of the plasma flows. Dynamos can generate magnetic fi…
Generalisation of an IMO Geometry Problem
Dina Kamber Hamzić, László Németh, Zenan Šabanac
In this paper, we generalise an interesting geometry problem from the 1995 edition of the International Mathematical Olympiad (IMO) using analytic geometry tools.
Tilings of -board with colored cubes and bricks
László Németh
Several articles deal with tilings with squares and dominoes on 2-dimensional boards, but only a few on boards in 3-dimensional space. We examine a tiling problem with colored cube…
On sunlet graphs connected to a specific map on
Omar Khadir, László Németh, László Szalay
In this article, we study the structure of the graph implied by a given map on the set , where is an odd prime. The consecutive applications of the map g…
Tilings of hyperbolic -board with colored squares and dominoes
Takao Komatsu, László Németh, László Szalay
Several articles deal with tilings with squares and dominoes of the well-known regular square mosaic in Euclidean plane, but not any with the hyperbolic regular square mosaics. In…
The growing ratios of hyperbolic regular mosaics with bounded cells
László Németh
In 3- and 4-dimensional hyperbolic spaces there are four, respectively five, regular mosaics with bounded cells. A belt can be created around an arbitrary base vertex of a mosaic.…
Magnetic cycles at different ages of stars
K. Oláh, Zs. Kővári, K. Petrovay +4
We study the different patterns of interannual magnetic variability in stars on or near the lower main sequence, approximately solar-type (G-K dwarf) stars in time series of 36 yea…
Diophantine triples with values in -generalized Fibonacci sequences
Clemens Fuchs, Christoph Hutle, Florian Luca +1
We show that if is an integer and is the sequence of -generalized Fibonacci numbers, then there are only finitely many triples of positive intege…
Evaluating the summer night sky brightness at a research field site on Lake Stechlin in northeastern Germany
Andreas Jechow, Franz Hölker, Zoltán Kolláth +2
We report on luminance measurements of the summer night sky at a field site on a freshwater lake in northeastern Germany (Lake Stechlin) to evaluate the amount of artificial skyglo…
Origin of the p-process radionuclides 92Nb and 146Sm in the early Solar System and inferences on the birth of the Sun
Maria Lugaro, Marco Pignatari, Ulrich Ott +4
The abundances of 92Nb and 146Sm in the early Solar System are determined from meteoritic analysis and their stellar production is attributed to the p process. We investigate if th…
Hyperbolic Pascal pyramid
László Németh
In this paper we introduce a new type of Pascal's pyramids. The new object is called hyperbolic Pascal pyramid since the mathematical background goes back to the regular cube mosai…
An RR Lyrae family portrait: 33 stars observed in Pisces with K2-E2
L. Molnár, R. Szabó, P. A. Moskalik +7
A detailed analysis is presented of 33 RR Lyrae stars in Pisces observed with the Kepler space telescope over the 8.9-day long K2 Two-Wheel Concept Engineering Test. The sample inc…
Hyperbolic Pascal triangles
Hacene Belbachir, László Németh, László Szalay
In this paper, we introduce a new generalization of Pascal's triangle. The new object is called the hyperbolic Pascal triangle since the mathematical background goes back to regula…
Coincidences in numbers of graph vertices corresponding to regular planar hyperbolic mosaics
László Németh, László Szalay
The aim of this paper is to determine the elements which are in two pairs of sequences linked to the regular mosaics and on the hyperbolic plane. The problem le…
Kepler photometry of RRc stars: peculiar double-mode pulsations and period doubling
P. Moskalik, R. Smolec, K. Kolenberg +11
We present the analysis of four first overtone RR Lyrae stars observed with the Kepler space telescope, based on data obtained over nearly 2.5yr. All four stars are found to be mul…
Nonlinear dynamical analysis of the Blazhko effect with the Kepler space telescope: the case of V783 Cyg
E. Plachy, J. M. Benkő, Z. Kolláth +2
We present a detailed nonlinear dynamical investigation of the Blazhko modulation of the Kepler RR Lyrae star V783 Cyg (KIC 5559631). We used different techniques to produce modula…
Stellar origin of the 182Hf cosmochronometer and the presolar history of solar system matter
Maria Lugaro, Alexander Heger, Dean Osrin +7
Among the short-lived radioactive nuclei inferred to be present in the early solar system via meteoritic analyses, there are several heavier than iron whose stellar origin has been…
Long time-scale behavior of the Blazhko effect from rectified Kepler data
J. M. Benkő, E. Plachy, R. Szabó +2
In order to benefit from the 4-year unprecedented precision of the Kepler data, we extracted light curves from the pixel photometric data of the Kepler space telescope for 15 Blazh…
Origin of Anomalous Xe-H in Nanodiamond Stardust
K. -L. Kratz, K. Farouqi, O. Hallmann +2
Still today, the nucleosynthesis origin of Xe-H in presolar nanodiamonds is far from understood. Historically, possible explanations were proposed by a secondary "neutron-burst" pr…
V473 Lyrae, a unique second-overtone Cepheid with two modulation cycles
László Molnár, László Szabados
V473 Lyrae is the only Galactic Cepheid with confirmed periodic amplitude and phase variations similar to the Blazhko effect observed in RR Lyrae stars. We collected all available…
Cepheids and RR Lyrae stars in the K2 fields
L. Molnár, E. Plachy, R. Szabó
With the step-and-stare approach of the K2 mission, Kepler will be able to observe a large number of Cepheid an RR Lyrae stars. In this paper we describe the target selection effor…
On the interchange of alternating-amplitude pulsation cycles
E. Plachy, L. Molnár, Z. Kolláth +2
We characterized the time intervals between the interchanges of the alternating high- and low-amplitude extrema of three RV Tauri and three RR Lyrae stars.
High-precision 2MASS JHKs light curves and other data for RR Lyrae star SDSS J015450+001501: strong constraints for non-linear pulsation models
R. Szabó, Z. Ivezić, L. L. Kiss +6
We present and discuss an extensive data set for the non-Blazhko ab-type RR Lyrae star SDSSJ015450+001501, including optical SDSS ugriz light curves and spectroscopic data, LINEAR…
Kepler RR Lyrae stars: beyond period doubling
L. Molnár, J. M. Benkő, R. Szabó +1
We examined the complete short cadence sample of Kepler RR Lyrae stars to further investigate the recently discovered dynamical effects such as period doubling and additional modes…