Galaxies and planetary systems department

The department Galaxies and Planetary Systems (GPS) studies evolution of isolated galaxies or galaxies in groups or clusters, formation of stars and star clusters. The infrared, UV and X-ray observations are compared to analytical models and computer simulations of gravitational and MHD processes. Properties of high enegry X-ray radiation from active galactic nuclei and galactic black hole candidates are analysed and modelled in the framework of general relativity. Earth rotation and its gravity field and the gravity field of other bodies of the solar system are studied. We analyse the dynamics of asteroids and Trans Neptunian Objects (TNO) and also compose an astrometric star catalogue.

Press release 16th November 2020 - The Stars at the Centre of the Milky Way - or "Enigmatic Rejuvenation"

The department has three working groups

Physics of galaxies

The group studies the dynamics, formation and evolution of galaxies as well as of stars and star clusters contained within. We investigate dynamics of interstellar gas and its ram-pressure stripping due to interaction with intracluster medium. We are also interested in spatially-resolved spectroscopy of active galactic nuclei, and in interactions in the local system Milky Way – Magellanic clouds.

Head: Jan Palouš

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Relativistic astrophysics

The relativistic group investigates compact objects (neutron stars or black holes) and studies processes, which take place in their vicinity. Based on our calculations and numerical simulations, we model properties of produced X-ray radiation, its spectra, polarization and temporal variability. We also perform theoretical calculations in the field of electrodynamics of black holes and accretion discs.

Head: Vladimír Karas

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Planetary systems

The Planetary systems group studies the dynamics of natural and artificial bodies in our solar system, and the dynamics of extra-solar planetary systems at nearby stars. We investigate gravitational and other effects on motion of Earth satellites. We use observational data from our zenith tube telescope to determine non-tidal variations of the local gravity vector and to refine on astrometric positions of observed stars. We also prepare an extremly accurate star catalogue.

Head: Cyril Ron

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Department head: Richard Wünsch
Deputy: Cyril Ron
Secretary: Helena Elgendy Žežulková
tel.: +420 226 258 400
Address: Boční II 1404/1, 141 00 Praha 4, CZ