Neutrino trapping in extremely compact Tolman VII spacetimes

@article{57621,
   author = {Stuchlík, Zdeněk and Hladík, Jan and Vrba, Jaroslav and Posada Aguirre, Nelson Camilo},
   article_location = {New York (USA)},
   article_number = {6},
   doi = {http://dx.doi.org/10.1140/epjc/s10052-021-09309-z},
   keywords = {ROTATING RELATIVISTIC STARS;EQUATIONS;SPHERES},
   language = {eng},
   issn = {1434-6044},
   journal = {European Physical Journal C},
   title = {Neutrino trapping in extremely compact Tolman VII spacetimes},
   url = {https://link.springer.com/article/10.1140/epjc/s10052-021-09309-z},
   volume = {81},
   year = {2021}
}

TY  - JOUR
ID  - 57621
AU  - Stuchlík, Zdeněk - Hladík, Jan - Vrba, Jaroslav - Posada Aguirre, Nelson Camilo
PY  - 2021
TI  - Neutrino trapping in extremely compact Tolman VII spacetimes
JF  - European Physical Journal C
VL  - 81
IS  - 6
SP  - "529-1"-"529-13"
EP  - "529-1"-"529-13"
PB  - SPRINGER
SN  - 14346044
KW  - ROTATING RELATIVISTIC STARS;EQUATIONS;SPHERES
UR  - https://link.springer.com/article/10.1140/epjc/s10052-021-09309-z
N2  - xtremely 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 spherically symmetric extremely compact objects constructed under the simplest approximation of the uniform energy density distribution, with radius located under the photosphere of the external spacetime; in addition, uniform emissivity distribution of neutrinos was assumed in these studies. Here we extend the studies of the neutrino trapping for the case of the extremely compact Tolman VII objects representing the simplest generalization of the internal Schwarzschild solution with uniform distribution of the energy density, and the correspondingly related distribution of the neutrino emissivity that is thus again proportional to the energy density; radius of such extremely compact objects can overcome the photosphere of the external Schwarzschild spacetime. In dependence on the parameters of the Tolman VII spacetimes, we determine the "local" and "global" coefficients of efficiency of the trapping and demonstrate that the role of the trapping is significantly stronger than in the internal Schwarzschild spacetimes. Our results indicate possible influence of the neutrino trapping in cooling of neutron stars.
ER  - 

STUCHLÍK, Zdeněk, Jan HLADÍK, Jaroslav VRBA and Nelson Camilo POSADA AGUIRRE. Neutrino trapping in extremely compact Tolman VII spacetimes. \textit{European Physical Journal C}. New York (USA): SPRINGER, 2021, vol.~81, No~6, p.~''529-1''-''529-13'', 13 pp. ISSN~1434-6044. Available from: https://dx.doi.org/10.1140/epjc/s10052-021-09309-z.