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
20 papers · 1 filter
On Dynamics of G-Band Bright Points
M. Bodnárová, D. Utz, J. Rybák
Various parameters describing the dynamics of G-band bright points (GBPs) were derived from G-band images, acquired by the Dutch Open Telescope (DOT), of a quiet region close to th…
X-ray observations of VY Scl type nova-like binaries in the high and low state
Polina Zemko, Marina Orio
Four VY Scl-type nova-like systems were observed in X-rays both during the low and the high optical states. They are BZ Cam, MV Lyr, TT Ari, and V794 Aql. Using archival ROSAT, Swi…
The association between sunspot magnetic fields and superpenumbral fibrils
Rohan E. Louis, Horst Balthasar, Christoph Kuckein +3
Spectropolarimetric observations of a sunspot were carried out with the Tenerife Infrared Polarimeter at Observatorio del Teide, Tenerife, Spain. Maps of the physical parameters we…
On the nature of the WO3 star DR1 in IC 1613
F. Tramper, G. Gräfener, O. E. Hartoog +8
We present the results of a quantitative spectroscopic analysis of the oxygen-sequence Wolf- Rayet star DR1 in the low-metallicity galaxy IC 1613. Our models suggest that the stron…
Solar Magnetized Tornadoes: Rotational Motion in a Tornado-like Prominence
Yang Su, Peter Gömöry, Astrid Veronig +5
Su et al. 2012 proposed a new explanation for filament formation and eruption, where filament barbs are rotating magnetic structures driven by underlying vortices on the surface. S…
Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. V: The Fifth Year (2012-2013)
Taichi Kato, Franz-Josef Hambsch, Hiroyuki Maehara +84
Continuing the project described by Kato et al. (2009a, arXiv:0905.1757), we collected times of superhump maxima for SU UMa-type dwarf novae mainly observed during the 2012-2013 se…
A Classification of the Veldkamp Lines of the Near Hexagon L_3 times GQ(2, 2)
R. M. Green, Metod Saniga
Using a standard technique sometimes (inaccurately) known as Burnside's Lemma, it is shown that the Veldkamp space of the near hexagon L_3 times GQ(2, 2) features 156 different typ…
Constraints on a second planet in the WASP-3 system
G. Maciejewski, A. Niedzielski, A. Wolszczan +30
There have been previous hints that the transiting planet WASP-3 b is accompanied by a second planet in a nearby orbit, based on small deviations from strict periodicity of the obs…
Simultaneous Yohkoh/SXT and TRACE Observations of Solar Plasma Ejections
E. Chmielewska, M. Tomczak, T. Mrozek
We investigated the relationship between hot (~10 MK) and warm (~1 MK) plasma ejections observed in the solar corona during some flares from April 1998 to December 2001. Based on t…
Spectroscopic metallicity determinations for W~UMa-type binary stars
Slavek M. Rucinski, Theodor Pribulla, Jan Budaj
This study is an attempt to determine the metallicities of WUMa-type binary stars using spectroscopy. ~4,500 spectra collected at the David Dunlap Observatory were subject to the s…
Evidence of quiet Sun chromospheric activity related to an emerging small-scale magnetic loop
P. Gömöry, H. Balthasar, K. G. Puschmann
Aims: We investigate the temporal evolution of magnetic flux emergence in the quiet Sun atmosphere close to disk center. Methods: We combine high-resolution SoHO/MDI magnetograms w…
The stellar content of the young open cluster Trumpler 37
R. Errmann, R. Neuhäuser, L. Marschall +21
With an apparent cluster diameter of 1.5° and an age of ~4 Myr, Trumpler 37 is an ideal target for photometric monitoring of young stars as well as for the search of planetary tran…
Grassmannian Connection Between Three- and Four-Qubit Observables, Mermin's Contextuality and Black Holes
Peter Levay, Michel Planat, Metod Saniga
We invoke some ideas from finite geometry to map bijectively 135 heptads of mutually commuting three-qubit observables into 135 symmetric four-qubit ones. After labeling the elemen…
A Massive Pulsar in a Compact Relativistic Binary
John Antoniadis, Paulo C. C. Freire, Norbert Wex +19
Many physically motivated extensions to general relativity (GR) predict significant deviations in the properties of spacetime surrounding massive neutron stars. We report the measu…
The nearby eclipsing stellar system delta Velorum - IV. Differential astrometry with VLT/NACO at the 100 microarcsecond level
Pierre Kervella, Antoine Mérand, Monika Petr-Gotzens +2
Context. delta Vel contains the brightest eclipsing binary in the southern sky (delta Vel A), and a nearby third star located ~0.6" away (delta Vel B). The proximity of delta Vel B…
The eclipsing binary TY CrA revisited: What near-IR light curves tell us
M. Vanko, M. Ammler-von Eiff, T. Pribulla +3
New photometric observations of the hierarchical eclipsing TY CrA system were taken in the optical with VYSOS6 and in the near-IR with SOFI and REMIR. They are the first observatio…
LEDDB: LOFAR Epoch of Reionization Diagnostic Database
O. Martinez-Rubi, V. K. Veligatla, A. G. de Bruyn +6
One of the key science projects of the Low-Frequency Array (LOFAR) is the detection of the cosmological signal coming from the Epoch of Reionization (EoR). Here we present the LOFA…
PGC 60020: a Polar-Ring Galaxy
O. A. Merkulova, G. M. Karataeva, V. A. Yakovleva +1
We present an analysis of new observations of a peculiar galaxy PGC 60020, obtained with the 6-m BTA telescope of the SAO RAS with a multimode SCORPIO instrument. The observational…
Multi-site campaign for transit timing variations of WASP-12 b: possible detection of a long-period signal of planetary origin
G. Maciejewski, D. Dimitrov, M. Seeliger +38
The transiting planet WASP-12 b was identified as a potential target for transit timing studies because a departure from a linear ephemeris was reported in the literature. Such dev…
An Average Supergranule: Much Larger Vertical Flows Than Expected
Michal Svanda
Supergranules are believed to be an evidence for large-scale subsurface convection. The vertical component of the supergranular flow field is very hard to measure, but it is consid…