57 citations · 190 across the 9 of their papers we have counts for
9 papers
Dark matter halos modeled by polytropic spheres influenced by the relict cosmological constant and trapping polytropes forming supermassive black holes
Zdeněk Stuchlík, Jan Novotný, Jan Hladík
We study dark matter halos modeled by general relativistic polytropic spheres in spacetimes with the repulsive cosmological constant representing vacuum energy density, governed by…
New interior model of neutron stars
Camilo Posada, Jan Hladík, Zdeněk Stuchlík
The Tolman VII solution is considered by some as one of the few analytical solutions to Einstein's equations, which describes approximately well the interior of neutron stars (NSs)…
Neutrino trapping in extremely compact Tolman VII spacetimes
Zdeněk Stuchlík, Jan Hladík, Jaroslav Vrba +1
Extremely compact objects trap gravitational waves or neutrinos, assumed to move along null geodesics in the trapping regions. The trapping of neutrinos was extensively studied for…
Dynamical stability of the modified Tolman VII solution
Camilo Posada, Jan Hladík, Zdeněk Stuchlík
Studies of neutron stars are at their peak after the multi-messenger observation of the binary merger event GW170817, which strongly constraints the stellar parameters like tidal d…
Polytropic spheres modelling dark matter halos of dwarf galaxies
Jan Novotný, Zdeněk Stuchlík, Jan Hladík
Dwarf galaxies and their dark matter (DM) halos have the velocity curves of a different character than those in large galaxies. They are modelled by a simple pseudo iso-thermal mod…
Dynamical instability of polytropic spheres in spacetimes with a cosmological constant
Camilo Posada, Jan Hladík, Zdenek Stuchlík
The dynamical instability of relativistic polytropic spheres, embedded in a spacetime with a repulsive cosmological constant, is studied in the framework of general relativity. We…
Radial instability of trapping polytropic spheres
Jan Hladík, Camilo Posada, Zdeněk Stuchlík
We complete the stability study of general relativistic spherically symmetric polytropic perfect fluid spheres, concentrating attention to the newly discovered polytropes containin…
Gravitational instability of polytropic spheres containing region of trapped null geodesics: a possible explanation of central supermassive black holes in galactic halos
Zdeněk Stuchlík, Jan Schee, Bobir Toshmatov +2
We study behaviour of gravitational waves in the recently introduced general relativistic polytropic spheres containing a region of trapped null geodesics extended around radius of…
Polytropic spheres containing regions of trapped null geodesics
Jan Novotný, Jan Hladík, Zdeněk Stuchlík
We demonstrate that in the framework of standard general relativity polytropic spheres with properly fixed polytropic index and relativistic parameter , giving ratio of the…