132 citations · 346 across the 13 of their papers we have counts for
13 papers
Refined reduction and standardisation of 53 years of UBV photometry at Hvar
Hrvoje Božić, Petr Harmanec, Miroslav Brož +17
Emission-line stars classified as Be exhibit light and colour variability on various timescales, ranging from days to decades. Their evolution must be constrained by long-term obse…
Bošković's Spherical Trigonometric Solution for Determining the Axis and Rate of Solar Rotation by Observing Sunspots in 1777
Mirko Husak, Roman Brajša, Dragan Špoljarić +5
In September 1777 Ruđer Bošković observed and measured the sun-spot positions to determine the solar rotation elements. In 1785, among other methods, he described a trigonometric s…
Bošković's method for determining the axis and rate of solar rotation by observing sunspots in 1777
Mirko Husak, Roman Brajša, Dragan Špoljarić +5
In 1777 Ruđer Bošković observed sunspots, determined their positions and the solar rotation elements by his own methods briefly described here. We repeat his calculations of the me…
A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS measured from stellar occultations
F. L. Rommel, F. Braga-Ribas, J. L. Ortiz +201
This work aims at constraining the size, shape, and geometric albedo of the dwarf planet candidate 2002 MS4 through the analysis of nine stellar occultation events. Using multichor…
Long-term, orbital, and rapid variations of the Be star V923 Aql = HD 183656
M. Wolf, P. Harmanec, H. Božić +9
We present the latest results of a long-term observational project aimed at observing, collecting from the literature, and homogenising the light, colour, and spectral variations o…
Meridional Motions and Reynolds Stress Determined by Using Kanzelhöhe Drawings and White Light Solar Images from 1964 to 2016
Domagoj Ruždjak, Davor Sudar, Roman Brajša +6
Sunspot position data obtained from Kanzelhöhe Observatory for Solar and Environmental Research (KSO) sunspot drawings and white light images in the period 1964 to 2016 were used t…
A Relationship between the Solar Rotation and Activity Analysed by Tracing Sunspot Groups
Domagoj Ruždjak, Roman Brajša, Davor Sudar +2
The sunspot position from Greenwich Photoheliographic Results (GPR), US Air Force Solar Optical Observing Network and National Oceanic and Atmospheric Administration (USAF/NOAA), a…
Geoeffectiveness of Coronal Mass Ejections in the SOHO era
Mateja Dumbovic, Andy Devos, Bojan Vrsnak +6
The main objective of the study is to determine the probability distributions of the geomagnetic Dst index as a function of the coronal mass ejection (CME) and solar flare paramete…
Exploring the Variable Sky with LINEAR. III. Classification of Periodic Light Curves
Lovro Palaversa, Željko Ivezić, Laurent Eyer +19
We describe the construction of a highly reliable sample of approximately 7,000 optically faint periodic variable stars with light curves obtained by the asteroid survey LINEAR acr…
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…
V2368 Oph: An eclipsing and double-lined spectroscopic binary used as a photometric comparison star for U Oph
P. Harmanec, H. Božić, P. Mayer +8
The A-type star HR 6412 = V2368 Oph was used by several investigators as a photometric comparison star for the known eclipsing binary U Oph but was found to be variable by three in…
Hydrodynamical and radiative modeling of temporal Hα emission V/R variations caused by a discontinuous mass transfer in binaries
Pavel Chadima, Roman Firt, Petr Harmanec +4
Hα emission V/R variations caused by a discontinous mass transfer in interacting binaries with a rapidly rotating accreting star are modelled qualititatively for the first time. Th…
UX Monocerotis as a W Serpentis binary
D. Sudar, P. Harmanec, H. Lehmann +3
Using our new photometric and spectroscopic observations as well as all available published data, we present a new interpretation of the properties of the peculiar emission-line bi…