Decaying orbits near a rotating black hole
Pecháček, T.; Karas, Vladimír
2004 - English We consider orbits of a test body near a rotating black hole. The orbits are perturbed by two effects which drive them away from purely geodesic motion. V této práci zkoumáme dráhy testovacích částic v blízkosti rotující černé díry.. Dráhy jsou ovlivněny perturbacemi, které způsobují jejich pomalý vývoj. Keywords: black holes; accretion; relativity Available at various institutes of the ASCR Decaying orbits near a rotating black hole

We consider orbits of a test body near a rotating black hole. The orbits are perturbed by two effects which drive them away from purely geodesic motion....

Pecháček, T.; Karas, Vladimír
Astronomický ústav, 2004

O trojjedinosti znaku, jazyka a řeči, ale ne myšlení?
Rajchl, Jaroslav
2004 - Czech Available at various institutes of the ASCR O trojjedinosti znaku, jazyka a řeči, ale ne myšlení?

Rajchl, Jaroslav
Astronomický ústav, 2004

General aspects of nonlinear resonance 3:2 in QPO context
Horák, Jiří
2004 - English In the resonant model, quasi periodic oscillations (QPOs) are supposed to be consequence of a nonlinear resonance between modes of oscillations within innermost parts of an accretion disk. Zkoumáme rezonanční model kvaziperiodických oscilací (QPO), podle něhož tento efekt souvisí s módy akrečního disku. Keywords: black holes; accretion; relativity Available at various institutes of the ASCR General aspects of nonlinear resonance 3:2 in QPO context

In the resonant model, quasi periodic oscillations (QPOs) are supposed to be consequence of a nonlinear resonance between modes of oscillations within innermost parts of an accretion ...

Horák, Jiří
Astronomický ústav, 2004

An XSPEC model to explore spectral fetures from black-hole sources
Dovčiak, Michal; Karas, Vladimír; Martocchia, A.; Matt, G.; Yaqoob, T.
2004 - English We report on a new general relativistic computational model enhancing, in various respects, the capability of presently available tools for fitting spectra of X-ray sources. Popisujeme nový software pro výpočty obecně relativistických vlivů ve spektrech rentgenových zdrojů. Nový program významně rozšiřuje dosavadní možnosti. Keywords: black holes; accretion; relativity Available at various institutes of the ASCR An XSPEC model to explore spectral fetures from black-hole sources

We report on a new general relativistic computational model enhancing, in various respects, the capability of presently available tools for fitting spectra of X-ray sources....

Dovčiak, Michal; Karas, Vladimír; Martocchia, A.; Matt, G.; Yaqoob, T.
Astronomický ústav, 2004

Stellar orbits in the gravitational field of a massive torus near a galactic centre
Šubr, L.; Karas, Vladimír
2004 - English We further examine orbits of satellite stars in the gravitational field of a dark supermassive compact body, which is surrounded by a self-gravitating accretion disc or a massive molecular torus. Tato práce je pokračováním studia drah satelitů v gravitační poli superhmotného kompaktního tělesa a akrečního disku nebo molekulárního toru. Keywords: black holes; accretion; relativity Available at various institutes of the ASCR Stellar orbits in the gravitational field of a massive torus near a galactic centre

We further examine orbits of satellite stars in the gravitational field of a dark supermassive compact body, which is surrounded by a self-gravitating accretion disc or a massive molecular ...

Šubr, L.; Karas, Vladimír
Astronomický ústav, 2004

Two dimensional spectroscopy of an irregular sunspot
Jurčák, Jan; Sobotka, Michal; Pillet, M.
2003 - English Available at various institutes of the ASCR Two dimensional spectroscopy of an irregular sunspot

Jurčák, Jan; Sobotka, Michal; Pillet, M.
Astronomický ústav, 2003

Digital spectrometer for radio astronomical observations
Jiřička, Karel; Montebugnoli, S.
2003 - English Available at various institutes of the ASCR Digital spectrometer for radio astronomical observations

Jiřička, Karel; Montebugnoli, S.
Astronomický ústav, 2003

Polární záře, sluneční činnost, stopy a počítačový virus?
Rajchl, Jaroslav; Rajchl, R.
2003 - Czech Available at various institutes of the ASCR Polární záře, sluneční činnost, stopy a počítačový virus?

Rajchl, Jaroslav; Rajchl, R.
Astronomický ústav, 2003

Duplicity of epsilon Persei confirmed
Libich, Jan; Harmanec, Petr; Yang, S.; Hadrava, Petr; Koubský, Pavel; Škoda, Petr; Šlechta, Miroslav; Aerts, C.; de Cat, P.
2003 - English Available at various institutes of the ASCR Duplicity of epsilon Persei confirmed

Libich, Jan; Harmanec, Petr; Yang, S.; Hadrava, Petr; Koubský, Pavel; Škoda, Petr; Šlechta, Miroslav; Aerts, C.; de Cat, P.
Astronomický ústav, 2003

Cosmological ideas in the 16th century
Hadrava, Petr; Hadravová, Alena
2003 - English The influence of Giordano Bruno on extending the scope of early modern cosmology behing the borders of Solar system is studies, expecially the Kepler's thoughts on the limits of the Universe. V práci je studován vliv Giordana Bruna na rozšíření obzoru raně novověké kosmologie za hranice Sluneční soustavy, zejména Keplerovy úvahy o konečnosti vesmíru. Keywords: Kepler-Olbers' paradox; history of astronomy; history of science Available at various institutes of the ASCR Cosmological ideas in the 16th century

The influence of Giordano Bruno on extending the scope of early modern cosmology behing the borders of Solar system is studies, expecially the Kepler's thoughts on the limits of the Universe....

Hadrava, Petr; Hadravová, Alena
Astronomický ústav, 2003