Bohdan Hnatyk

Bohdan Hnatyk

Leading Researcher of the Astrophysics Department of Astronomical Observatory

Scientific Engineer
Institute for Applied Problems in Mechanics and Mathematics, Academy of Sciences of Ukraine (IPPMM), L'viv (Ukraine)

Young Fellow Researcher
IPPMM, L'viv (Ukraine)

Fellow Researcher
IPPMM, L'viv (Ukraine)

Senior Fellow Researcher
IPPMM, L'viv (Ukraine)

Leading Fellow Researcher
IPPMM, L'viv (Ukraine)

Director of Astronomical Observatory
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

Head of Scientific Laboratory "Astronomical Observatory"
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

Leading Fellow Researcher
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

Reader of Department of Astronomy and Space Physics, Physical Faculty
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)


L'viv State University, L'viv (Ukraine)

Ph.D of Physical and Mathematical Sciences
Main Astronomical Observatory NAS of Ukraine, Kyiv (Ukraine)

Doctor of Sciences of Physical and Mathematical Sciences
Main Astronomical Observatory NAS of Ukraine, Kyiv (Ukraine)

Winner of prize after Barabashow of National Academy of Sciences of Ukraine in field of astronomy

Cosmic ray astrophysics

Research Fields:

Previous and Current Research

In field of cosmic plasma physics we worked out approximate analytical methods for describing the motion of strong shocks in arbitrary non-uniform media and applied them to the investigation of Supernova remnants’ evolution in a nonuniform interstellar medium.

In field of cosmic ray astrophysics we investigated the sources, acceleration mechanisms and energy spectra of ultra high energy cosmic rays.

In field of cosmic topological defects’ physics we investigated the astrophysical signatures of cosmic strings. 

Future Projects and Goals

We are the participants of the International Cherenkov Telescope Array (CTA) project. CTA is next generation ground-based observatory for gamma-ray astronomy at very high energies (

Methodological and Technical Expertise

Cosmic rays, shock waves in cosmic plasmas, Supernova remnants, cosmic strings.

Selected Publications

Marchenko V., Harris D. E., Ostrowski M., Stawarz Ł., Bohdan A., Jamrozy M., Hnatyk, B. 
Novel Analysis of the Multiwavelength Structure of the Relativistic Jet in Quasar 3C 273 
Astrophys. J. – 2017. – V. 844, N1, article id. 11, (15 pp.).

Sushch I., Hnatyk B.
Modeling of the Radio Emission from the Vela Supernova Remnant
Astron. and Astrophys. – 2014.-V. 561, À139 (8 pp).

Sushch I.,  Hnatyk B.,  Neronov A.,
Modeling of the Vela complex including the Vela supernova remnant, the binary system γ2 Velorum, and the Gum nebula.
Astron. and Astrophys. – 2011. – V. 525, À154 (8 pp.).

Aloisio R., Berezinsky V. Blasi P. Gazizov A. Grigorieva S., Hnatyk B.
A dip in the UHECR spectrum and the transition from galactic to extra­galactic cosmic rays.
Astroparticle Physics. – 2007. – V. 27.  – N 1.  – P. 76-91.

Schild, R.; Masnyak, I. S.; Hnatyk, B. I.; Zhdanov, V. I.
Anomalous fluctuations in observations of Q0957+561 A,B: Smoking gun of a cosmic string?
Astronomy and Astrophysics. – 2004. – V. 422. – P. 477.

Berezinsky V., Hnatyk B.I., Vilenkin A.
Gamma ray bursts from super conducting cosmic strings.
Phys. Rev. D. – 2001. – V. D64, 043004.