3.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Slovak Academy of SciencesSK377 papers
- Centre National de la Recherche ScientifiqueFR328 papers
- University of GroningenNL256 papers
- Instituto de Astrofísica de CanariasES218 papers
- Leiden UniversityNL201 papers
- University of AmsterdamNL199 papers
- Université Paris CitéFR193 papers
- National Institute for AstrophysicsIT192 papers
- Czech Academy of Sciences, Astronomical InstituteCZ181 papers
- Sorbonne UniversitéFR178 papers
- Max Planck Institute for AstronomyDE177 papers
- Goddard Space Flight CenterUS172 papers
27 papers · 1 filter
Rotational properties of single and wide binary subdwarf B stars
S. Geier, U. Heber, H. Edelmann +2
We measured projected rotational velocities of more than a hundred apparently single sdBs. A comparison is made with sdB stars in binary systems with orbits so wide, that tidal int…
Mermin's Pentagram as an Ovoid of PG(3,2)
Metod Saniga, Peter Levay
Mermin's pentagram, a specific set of ten three-qubit observables arranged in quadruples of pairwise commuting ones into five edges of a pentagram and used to provide a very simple…
Plasma diagnostics of an EIT wave observed by Hinode/EIS and SDO/AIA
A. M. Veronig, P. Gomory, I. W. Kienreich +4
We present plasma diagnostics of an EIT wave observed with high cadence in Hinode/EIS sit-and-stare spectroscopy and SDO/AIA imagery obtained during the HOP-180 observing campaign…
Modelling of the ultraviolet and visual SED variability in the hot magnetic Ap star CU Vir
J. Krticka, Z. Mikulasek, T. Luftinger +4
The spectral energy distribution (SED) in chemically peculiar stars may be significantly affected by their abundance anomalies. The observed SED variations are usually assumed to b…
Variability of Hot Post-AGB Star IRAS 19336-0400 in the Early Phase of its Planetary Nebula Ionization
V. P. Arkhipova, M. A. Burlak, V. F. Esipov +2
We present photoelectric and spectral observations of a hot candidate proto-planetary nebula - early B-type supergiant with emission lines in spectrum - IRAS 19336-0400. The light…
Abundance analysis of Am binaries and search for tidally driven abundance anomalies - III. HD116657, HD138213, HD155375, HD159560, HD196544 and HD204188
I. Stateva, I. Kh. Iliev, J. Budaj
We continue here the systematic abundance analysis of a sample of Am binaries in order to search for possible abundance anomalies driven by tidal interaction in these binary system…
Day and night side core cooling of a strongly irradiated giant planet
J. Budaj, I. Hubeny, A. Burrows
The internal heat loss, or cooling, of a planet determines its structure and evolution. We study the effects of irradiation, metallicity of the atmosphere, heat redistribution, str…
Does the neutron star in Her X-1 really show free precession?
R. Staubert, D. Klochkov, D. Vasco +4
The accreting X-ray pulsar Her X-1 shows two types of long-term variations, both with a period of 35 days: 1) A modulation of the flux with a ten day long Main-On and a 5 d long Sh…
Formation of a disk structure in the symbiotic binary AX Per during its 2007-10 precursor-type activity
A. Skopal, T. N. Tarasova, Z. Cariková +12
AX Per is an eclipsing symbiotic binary. During active phases, deep narrow minima are observed in its light curve, and the ionization structure in the binary changes significantly.…
Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V901 Orionis
Zdenek Mikulasek, Jiri Krticka, Gregory W. Henry +13
CU Vir and V901 Ori belong among these few magnetic chemically peculiar stars whose rotation periods vary on timescales of decades. We aim to study the stability of the periods in…
Formation of neutral disk-like zone around the active hot stars in symbiotic binaries
Zuzana Carikova, Augustin Skopal
In this contribution we present the ionization structure in the enhanced wind from the hot star in symbiotic binaries during active phases. Rotation of the hot star leads to the co…
Ensemble asteroseismology of red-giant stars
S. Hekker, R. L. Gilliland, Sarbani Basu +3
The successful launches of the CoRoT and Kepler space missions have led to the detections of solar-like oscillations in large samples of red-giant stars. The large numbers of red g…
A new flare star member candidate in the Pleiades cluster
M. Moualla, T. O. B. Schmidt, R. Neuhäuser +19
We present a new flare star, which was discovered during our survey on a selected field at the edge of the Pleiades cluster. The field was observed in the period 2007 - 2010 with t…
SPHOTOM -- Package for an Automatic Multicolour Photometry
S. Parimucha, M. Vanko, P. Miklos
We present basic informations about package SPHOTOM for an automatic multicolour photometry. This package is in development for a creation of photometric pipe-line, which we plan t…
New photometric observations of the transiting extrasolar planet TrES-3b
M. Vaňko, M. Jakubík, T. Krejčová +7
We present new transit observations of the transiting exoplanet TrES-3b obtained in the range 2009 -- 2011 at several observatories. The orbital parameters of the system were redet…
Synthetic Spectra and Light Curves of Interacting Binaries and Exoplanets with Circumstellar Material: SHELLSPEC
Jan Budaj
Program SHELLSPEC is designed to calculate light-curves, spectra and images of interacting binaries and extrasolar planets immersed in a moving circumstellar environment which is o…
Free Cyclic Submodules and Non-Unimodular Vectors
Joanne L. Hall, Metod Saniga
Given a finite associative ring with unity, , and its two-dimensional left module, , the following two problems are addressed: 1) the existence of vectors of that…
Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III: The Third Year (2010--2011)
Taichi Kato, Hiroyuki Maehara, Ian Miller +75
Continuing the project described by Kato et al. (2009, PASJ 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 51 SU UMa-type dwarf novae mainly observed during…
Search for star-planet interaction
Tereza Krejcova, Jan Budaj, Julius Koza
We analyse the chromospherical activity of stars with extrasolar planets and search for a possible correlation between the equivalent width of the core of Ca II K line and orbital…
Effects of dust on light-curves of εAur type stars
J. Budaj
εAuriga is one of the most mysterious objects on the sky. Prior modeling of its light-curve assumed a dark, inclined, non-transparent or semi-transparent, dusty disk with a central…
Considerations on the accretion of Uranus and Neptune by mutual collisions of planetary embryos in the vicinity of Jupiter and Saturn
M. Jakubik, A. Morbidelli, L. Neslusan +1
Modeling the formation of the ice giants Uranus and Neptune is a long-lasting problem in planetary science. Due to gas-drag, collisional damping, and resonant shepherding, the plan…
Young Exoplanet Transit Initiative (YETI)
R. Neuhäuser, R. Errmann, A. Berndt +80
We present the Young Exoplanet Transit Initiative (YETI), in which we use several 0.2 to 2.6m telescopes around the world to monitor continuously young (< 100 Myr), nearby (< 1 kpc…
The nearby eclipsing stellar system delta Velorum III. Self-consistent fundamental parameters and distance
A. Merand, P. Kervella, T. Pribulla +6
The triple stellar system delta Vel (composed of two A-type and one F-type main sequence stars) is particularly interesting as it contains one of the nearest and brightest eclipsin…
Lunar Eclipse of June, 15, 2011: Three-color umbra surface photometry
Oleg S. Ugolnikov, Igor A. Maslov, Stanislav A. Korotkiy
The paper contains the result description of the photometric observations of the Moon surface during the total lunar eclipse of June, 15, 2011 conducted in southern Russia and Ukra…