Research publications

Refereed papers

• Alpha-viscosity effects in slender tori (ads, pdf)
  Horak J., Abramowicz M. A., Levin L., Slapak R., Straub O. 2012; Accepted by Publications of the Astronomical Society of Japan, arXiv:1201.5479


• Internal resonance in nonlinear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs (ads)
  Horak J., Abramowicz M. A., Kluzniak W., Rebusco P., Torok G. 2009; Accepted by Astronomy & Astrophysics, arXiv:0901.3076


• The Polish doughnuts revisited I. The angular momentum distribution and equipressure surfaces (ads, pdf, source)
  Qian L., Abramowicz M. A., Fragile P. C., Horak J., Machida M., Straub O. 2009; Accepted by Astronomy & Astrophysics, arXiv:0812.2467


• Weak nonlinear coupling between epicyclic modes in slender tori (ads, pdf, source)
  Horak J. 2008; Astronomy and Astrophysics, 486, pp. 1-8


• Distribution of kilohertz QPO frequencies and their ratios in the atoll source 4U 1636-53 (ads, pdf, source)
  Torok G., Abramowicz M. A., Bakala P., Bursa M., Horak J., Kluzniak W., Rebusco P., Stuchlik, Z. 2008; Acta Astronomica, 58, pp. 113-119


• Modulation of the Neutron Star Boundary Layer Luminosity by Disk Oscillations (ads, pdf, source)
  Abramowicz M. A., Horak J. and Kluzniak W. 2007; Acta Astronomica 57, pp.1-10


• Twin-peak quasiperiodic oscillations as an internal resonance (ads, pdf, source)
  Horak J. and Karas V. 2006; Astronomy and Astrophysics 451, pp.377-386


• Epicyclic oscillations of fluid bodies: II. Strong gravity (ads, pdf)
  Abramowicz M A., Blaes O. M., Horak J., Kluzniak W. and Rebusco P. 2006; Classical and Quantum Gravity 23, pp. 1689-1696


• Polarization of Light from Warm Clouds above an Accretion Disk: Effects of Strong Gravity near a Black Hole (ads, pdf, source)
  Horak J. and Karas V. 2006; Publications of the Astronomical Society of Japan 58, pp. 203-209


• On the role of strong gravity in polarization from scattering of light in relativistic flows (ads, pdf, source)
  Horak J. and Karas V. 2006; Monthly Notices of the Royal Astronomical Society 365, pp. 813-826.


• The correlations and anticorrelations in QPO data (ads, pdf, source)
  Abramowicz M. A., Barret D., Bursa M., Horak J., Kluzniak W., Rebusco P. and Torok, G.; Astronomische Nachrichten, 326, pp. 864-866


• A possible mechanism for QPOs modulation in neutron star sources (ads, pdf, source)
  Horak J.; Astronomische Nachrichten, 326, pp. 845-848


• The autoparametric 3:2 resonance in conservative systems (ads, pdf, source)
  Horak J.; Astronomische Nachrichten, 326, pp. 824-829


• Of NBOs and kHz QPOs: a Low-Frequency Modulation in Resonant Oscillations of Relativistic Accretion Disks (ads, pdf, source)
  Horak J., Abramowicz M. A., Karas V. and Kluzniak W.; Publications of the Astronomical Society of Japan 56, pp. 819-822

Proceedings contributions

• Disk instability as an energy source for quasi-periodic oscillations (pdf, source)
  Horak J. 2007; Proceedings of RAGtime 8/9


• The Twin Peak QPOs in Neutron Star and Black Hole Sources: What is explained, and What is not (ads, pdf)
  Abramowicz M. A., Kluzniak W., Bursa M., Horak J., Rebusco P. and Torok, G. 2007; Revista Mexicana de Astronomia y Astrofisica (Serie de Conferencias) 27, pp. 8-17


• Intensity and polarization light-curves from radiatively-driven clouds (ads, pdf, source)
  Horak J. and Karas V. 2007; Black Holes from Stars to Galaxies -- Across the Range of Masses, Proceedings of IAU Symposium #238 pp.381-382


• On polarization of light scattered on hot electron clouds (ads, pdf, source)
  Horak J. 2005; Proceedings of RAGtime 6/7, pp. 63-70


• A note on the slope-shift anticorrelation in the neutron star kHz QPOs data (ads, pdf)
  Abramowicz M. A., Barret D., Bursa M., Horak J., Kluzniak W., Rebusco P. and Torok, G.; Proceedings of RAGtime 6/7, pp. 1-9


• General aspects of nonlinear resonance 3:2 in QPO context (ads, pdf, source)
  Horak J. 2004; Proceedings of RAGtime 4/5, pp. 91-110; astro-ph/0408092