J 2021

Neutrino trapping in extremely compact Tolman VII spacetimes

STUCHLÍK, Zdeněk, Jan HLADÍK, Jaroslav VRBA and Nelson Camilo POSADA AGUIRRE

Basic information

Original name

Neutrino trapping in extremely compact Tolman VII spacetimes

Authors

STUCHLÍK, Zdeněk (203 Czech Republic, belonging to the institution), Jan HLADÍK (203 Czech Republic, belonging to the institution), Jaroslav VRBA (203 Czech Republic, belonging to the institution) and Nelson Camilo POSADA AGUIRRE (170 Colombia, belonging to the institution)

Edition

European Physical Journal C, New York (USA), SPRINGER, 2021, 1434-6044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19630/21:A0000144

Organization unit

Institute of physics in Opava

UT WoS

000691299500002

Keywords in English

ROTATING RELATIVISTIC STARS;EQUATIONS;SPHERES

Tags

Tags

International impact, Reviewed
Změněno: 8/2/2022 14:54, Mgr. Pavlína Jalůvková

Abstract

V originále

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.