ELFT HÍRADÓ

[Somogyi Gábor <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


Horváth Anna
(HUN-REN Wigner RCP, ELTE)


“The effect of extra dimensions on compact star observables”


címmel tartandó szemináriumára.


Kivonat:



Kaluza and Klein proposed a theory with a compactified extra dimension, which 
may appear in high-energy reactions or in the presence of superdense matter. 
In this work, I show how astrophysical observables will be modified in the 
presence of extra compactified dimensions.

The interior of a compact star is modelled as a multidimensional interacting 
degenerate Fermi gas, embedded in a static, spherically symmetric spacetime 
with extra compactified spatial dimensions. The equation of state of this 
extreme medium is given and compared to the standard models of superdense 
matter. The modification of the mass-radius relation of compact stars is 
calculated and compared to realistic star models and astrophysical 
observation data. The interaction strength has been determined for this 
extraordinary matter. Constraints on the size of the extra dimension have 
been estimated based on pulsar measurements [1,2].

[1] A. Horváth, E. Forgács-Dajka, G.G. Barnaföldi: "Application of 
Kaluza-Klein Theory in Modeling Compact Stars: Exploring Extra Dimensions", 
MNRAS, arXiv:2408.16497, https://doi.org/10.1093/mnras/stae2637
[2] A. Horváth, E. Forgács-Dajka, G.G. Barnaföldi: "The effect of multiple 
extra dimensions on the maximal mass of compact stars in Kaluza-Klein 
space-time", Accepted to International Journal of Modern Physics A, 
arXiv:2410.10920



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2025 február 21. péntek d.u. 14 óra

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          Somogyi Gábor