187 citations
- Polish Academy of SciencesPL9 papers
- Nicolaus Copernicus UniversityPL5 papers
- Centre National de la Recherche ScientifiqueFR3 papers
- California Institute of TechnologyUS2 papers
- Institut d'Astrophysique de ParisFR2 papers
- Institute of Applied AstronomyRU2 papers
- Institute of AstronomyRU2 papers
- Max Planck Institute for AstrophysicsDE2 papers
- Max Planck Institute for Extraterrestrial PhysicsDE2 papers
- Observatoire de ParisFR2 papers
- University of WarsawPL2 papers
- Adam Mickiewicz University in PoznańPL1 paper
42 papers · 1 filter
Orbital and superorbital variability and their coupling in X-ray binaries
Andrzej A. Zdziarski, Juri Poutanen, Askar Ibragimov +2
We review X-ray flux modulation from X-ray binaries on time scales corresponding to the orbital period and those at longer time scales (so called superorbital). Those modulations p…
Masses of Black Holes in the Universe
Janusz Ziolkowski
The different methods of determination of black holes (BHs) masses are presented for three classes of BHs observed in the Universe: stellar mass BHs, intermediate mass BHs (IMBHs)…
Precise Astrometry of Visual Binaries with Adaptive Optics. A Way for Finding Exoplanets?
Krzysztof Hełminiak, Maciej Konacki
We present the results of our study of astrometric stability of 200-in Hale (Mt. Palomar) and 10-m Keck II (Mauna Kea) telescopes, both with Adaptive Optics (AO) facilities. A grou…
Hot-spot model for accretion disc variability as random process
T. Pechacek, V. Karas, B. Czerny
Theory of random processes provides an attractive mathematical tool to describe the fluctuating signal from accreting sources, such as active galactic nuclei and Galactic black hol…
An occultation event in a triple post-AGB star
M. Hajduk, A. A. Zijlstra, K. Gesicki
We study the post-AGB central star of the (bipolar) Galactic bulge planetary nebula M 2-29. We have obtained additional HST imaging and SAAO spectroscopy of the object. The star sh…
Fast rotation of neutron stars and equation of state of dense matter
P. Haensel, J. L. Zdunik, M. Bejger
Fast rotation of compact stars (at submillisecond period) and, in particular, their stability, are sensitive to the equation of state (EOS) of dense matter. Recent observations of…