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Anna Horváth05/11/2026, 14:00
In the Kaluza–Klein theory, one extra spatial dimension is added to usual spacetime. On one hand, particles moving in it gain excitations leading to a mass spectrum, which can be associated with hadronic states. Neutron stars are modelled using the equation of state of an extra-dimensional interacting zero-temperature Fermi gas. Macroscopic observables are calculated, compared to astronomical...
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Anna Göblyös (Szegedi Tudományegyetem)05/11/2026, 14:15
Blazars are promising candidate sources of high-energy astrophysical neutrinos, but the location of neutrino production in blazars remains uncertain. In our study (Kun et al. 2026), we investigate the temporal connection between a suspected IceCube neutrino flare and the gamma-ray and radio emission of the blazar GB6 J1542+6129. We performed a likelihood analysis of 17 years of Fermi-LAT data...
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Máté Pszota (Wigner RCP, Eötvös University)05/11/2026, 14:30
The methods of nonequilibrium thermodynamics allow the proper handling of local specific gravitational energy of a self-gravitating fluid. The hydrodynamic framework allows various models to be integrated, for example the Ohanian form of gravitational energy density, which is thermodynamically distinguished. The resulting field equations also allow a thermodynamic coupling to exist, which...
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Balázs Pál (Wigner Research Centre for Physics)05/11/2026, 14:45
Almost every cosmological simulation of the past four decades has been run in a periodic cube. The choice is so universal that it is rarely stated as an assumption, yet it is one: it gives the simulated universe the topology of a $3$-torus. But what that assumption costs us and how to deal with the problems it introduces? A cube is not rotationally symmetric, so angular momentum is not...
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Enikő Pichler (University of Debrecen)05/11/2026, 15:00
Areas of massive star formation are heavily affected by stellar winds and supernovae, therefore we expect enhanced turbulent flows in such regions. I present kinematic properties in dwarf galaxy DDO 43 (d = 7.8 Mpc), revisiting the high-resolution HI 21-cm VLA spectra of the LITTLE THINGS survey. The line profiles are carefully analysed in the CLASS radioastronomical data reduction software,...
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Júlia Katona05/11/2026, 15:45
The cosmic web of galaxies carries information about the growth and expansion history of the universe. Mapping the large-scale structure of the universe is the main goal of several current galaxy surveys, while also providing insights about the nature of dark matter and dark energy, which make up 95% of the universe.
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Cosmic voids are huge underdense regions in the galaxy distribution that are... -
Agnes Bogdan (ELTE)05/11/2026, 16:00
The large-scale structure of the Universe has been primarily shaped by the gravitational collapse of dark matter. On the largest scales, galaxies are distributed across galaxy groups, galaxy clusters, and filaments which surround vast cosmic voids. My work focuses on systems with masses in the range of 1012 - 1014 M☉. Although less massive than galaxy clusters, these structures are much more...
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Wancheng Xu05/11/2026, 16:15
Dual active galactic nuclei (AGN) play a crucial role in understanding supermassive black hole growth and evolution in merger systems. The milliarcsecond resolution provided by Very Long Baseline Interferometry (VLBI) is indispensable for resolving these closely separated systems. In this talk, I will present the high-resolution VLBI imaging investigations of two sub-kiloparsec-scale dual AGN...
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