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
30 papers · 1 filter
Detection of Change in Supercycles in ER Ursae Majoris
Polina Zemko, Taichi Kato, Sergey Shugarov
We examined data on about 20 years of observations of ER UMa available in AAVSO, VSNET, AFOEV, NSVS, VSOLJ databases together with published light curves. The obtained O-C diagram…
Peculiarities in the orbital and precessional variability of SS433 from INTEGRAL observations
A. Cherepashchuk, R. Sunyaev, S. Molkov +3
Based on multiyear INTEGRAL observations of SS433, a composite IBIS/ISGRI 18-60 keV orbital light curve is constructed around zero precessional phase . It shows a peculi…
Quasi-spherical accretion in low-luminosity X-ray pulsars: Theory vs. observations
K. Postnov, N. Shakura, A. Kochetkova +1
Quasi-spherical subsonic accretion can be realized in slowly rotating wind-fed X-ray pulsars (XPSRs) at X-ray luminosities <4 10^{36} erg/s. In this regime the accreting matter set…
Distinguished three-qubit 'magicity' via automorphisms of the split Cayley hexagon
Michel Planat, Metod Saniga, Frederic Holweck
Disregarding the identity, the remaining 63 elements of the generalized three-qubit Pauli group are found to contain 12096 distinct copies of Mermin's magic pentagram. Remarkably,…
Analysis of the motion of an extrasolar planet in a binary system
E. Plávalová, N. A. Solovaya
More than 10% of extra-solar planets (EPs) orbit in a binary or multiple stellar system. We investigated the motion of planets revolving in binary systems in the frame of the parti…
Electron optical depths and temperatures of symbiotic nebulae from Thomson scattering
M. Sekeras, A. Skopal
Symbiotic binaries are comprised of nebulae, whose densest portions have electron concentrations of 1E+8 - 1E+12 cm-3 and extend to a few AU. They are optically thick enough to cau…
Ionization structure of hot components in symbiotic binaries during active phases
Zuzana Carikova, Augustin Skopal
During active phases of symbiotic binaries, an optically thick medium in the form of a flared disk develops around their hot stars. During quiescent phases, this structure is not e…
Measuring the orbital inclination of Z Andromedae from Rayleigh scattering
A. Skopal, N. Shagatova
The orbital inclination of the symbiotic prototype Z And has not been established yet. At present, two very different values are considered, i ~ 44 degrees and i >~ 73 degrees. The…
Modeling the Accretion Structure of AU Mon
Corwin Atwood-Stone, Brendan P. Miller, Mercedes T. Richards +2
AU Mon is a long-period (11.113 d) Algol-type binary system with a persistent accretion disk that is apparent as double-peaked H-alpha emission. We present previously unpublished o…
Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
Taichi Kato, Franz-Josef Hambsch, Hiroyuki Maehara +85
Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we studied 86 SU UMa-type dwarf novae. We confirmed the general trends such as the relation between period…
Is there a compact companion orbiting the late O-type binary star HD 164816?
L. Trepl, V. V. Hambaryan, T. Pribulla +7
We present a multi-wavelength (X-ray, -ray, optical and radio) study of HD 194816, a late O-type X-ray detected spectroscopic binary. X-ray spectra are analyzed and the X-ray ph…
Catch me if you can: is there a runaway-mass black hole in the Orion Nebula Cluster?
Ladislav Subr, Pavel Kroupa, Holger Baumgardt
We investigate the dynamical evolution of the Orion Nebula Cluster (ONC) by means of direct N-body integrations. A large fraction of residual gas was probably expelled when the ONC…
Modelling the light-curve of KIC 12557548b: an extrasolar planet with a comet like tail
Jan Budaj
An object with a very peculiar light-curve was discovered recently using Kepler data. Authors argue that this object may be a transiting disintegrating planet with a comet like dus…
Binary interaction dominates the evolution of massive stars
H. Sana, S. E. de Mink, A. de Koter +7
The presence of a nearby companion alters the evolution of massive stars in binary systems, leading to phenomena such as stellar mergers, X-ray binaries and gamma-ray bursts. Unamb…
Structure Decomposition for the Luminous Disk Galaxies in the NGC 524 Group
M. A. Ilyina, O. K. Sil'chenko
Members of the NGC 524 group of galaxies are studied using data obtained on the 6m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences, with the S…
Unique sextuple system: 65 Ursae Majoris
P. Zasche, R. Uhlář, M. Šlechta +4
Context. 65 UMa belongs to rather small group of stellar systems of higher multiplicity, whose inner and outer orbits are well-known. Methods: Photometric, spectroscopic, and inter…
The DWARF project: Eclipsing binaries - precise clocks to discover exoplanets
T. Pribulla, M. Vaňko, M. Ammler - von Eiff +53
We present a new observational campaign, DWARF, aimed at detection of circumbinary extrasolar planets using the timing of the minima of low-mass eclipsing binaries. The observation…
Initial parameters of neutron stars
S. B. Popov, R. Turolla
A subpopulation of neutron stars (NSs), known as central compact objects (CCOs) in supernova remnants, are suspected to be low-field objects basing on - measurements for…
'Magic' Configurations of Three-Qubit Observables and Geometric Hyperplanes of the Smallest Split Cayley Hexagon
Metod Saniga, Michel Planat, Petr Pracna +1
Recently Waegell and Aravind [J. Phys. A: Math. Theor. 45 (2012), 405301, 13 pages] have given a number of distinct sets of three-qubit observables, each furnishing a proof of the…
Five-Qubit Contextuality, Noise-Like Distribution of Distances Between Maximal Bases and Finite Geometry
Michel Planat, Metod Saniga
Employing five commuting sets of five-qubit observables, we propose specific 160-661 and 160-21 state proofs of the Bell-Kochen-Specker theorem that are also proofs of Bell's theor…
PTPS Candidate Exoplanet Host Star Radii Determination with CHARA Array
Pawel Zielinski, Martin Vanko, Ellyn Baines +2
We propose to measure the radii of the Penn State - Torun Planet Search (PTPS) exoplanet host star candidates using the CHARA Array. Stellar radii estimated from spectroscopic anal…
Finite Geometry Behind the Harvey-Chryssanthacopoulos Four-Qubit Magic Rectangle
Metod Saniga, Michel Planat
A "magic rectangle" of eleven observables of four qubits, employed by Harvey and Chryssanthacopoulos (2008) to prove the Bell-Kochen-Specker theorem in a 16-dimensional Hilbert spa…
A Possible Detection of Occultation by a Proto-planetary Clump in GM Cephei
The YETI Collaboration, W. P. Chen, S. C. -L. Hu +41
GM Cep in the young (~4 Myr) open cluster Trumpler 37 has been known to be an abrupt variable and to have a circumstellar disk with very active accretion. Our monitoring observatio…
Recent photometry of symbiotic stars - XIII
A. Skopal, S. Shugarov, M. Vanko +4
We present new multicolour (UBVRcIc) photometric observations of classical symbiotic stars, EG And, Z And, BF Cyg, CH Cyg, CI Cyg, V1329 Cyg, TX CVn, AG Dra, Draco C1, AG Peg and A…