文献类型：期刊文献

英文题名：The neutrino pair annihilation (νν -→ e-e plus ) around a massive source with an f(R) global monopole

作者：Shi, Yuxuan[1,2];Cheng, Hongbo[1,2]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Shanghai Key Lab Astrophys, Shanghai 200234, Peoples R China

年份：2022

卷号：140

期号：4

外文期刊名：EPL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000889637900001)】；

基金：This work is partly supported by the Shanghai Key Lab-oratory of Astrophysics 18DZ2271600.

语种：英文

摘要：- In this work we investigate the neutrino pair annihilation around a gravitational object involving an f(R) global monopole. We derive and calculate the ratio (Q)over dot/QN(ewt) meaning that the energy deposition per unit time is over that in the Newtonian case. It is found that the greater influence from f(R) theory leads more energy to set free from the annihilation with greater ratio value. It is important that the existence of global monopole makes a sharp increase in the ratio (Q)over dot/QN(ewt) , causing heavier gamma-ray burst. We also discuss the derivative dQ dr as a function of radius r of the star to show the similar features, that is the considerable modification of Einstein's gravity and the global monopole with unified theory order will raise the amount of d(Q)over dot/dr more greatly. The stellar body with f(R) global monopole can be well qualified as a source of gamma-ray bursts. Moreover, we can select the factor psi(0) to be comparable with the accelerating universe while regulating the parameter eta for the global monopole in order to make the ratio curves coincide with the results from astronomy. It is possible to probe the monopole from astrophysical observations.Copyright (C) 2022 EPLA