Comment on "Acceleration of particles to high energy via gravitational repulsion in the Schwarzschild field" [Astropart. Phys. 86 (2017) 18-20]

被引：2

作者：

Spallicci, Alessandro D. A. M. ^{[1
,2
,3
]}

机构：

[1] Univ Orleans, Observ Sci Univers Reg Ctr OSUC, UMS 3116, 1A Rue Ferollerie, F-45071 Orleans, France

[2] Univ Orleans, Coll Sci & Tech CoST, Pole Phys, Rue Chartres, F-45100 Orleans, France

[3] CNRS, LPC2E, UMR 7328, Campus CNRS,3A Ave Rech Sci, F-45071 Orleans, France

来源：

ASTROPARTICLE PHYSICS | 2017年 / 94卷

关键词：

Free fall; Black holes; Cosmic rays; Geodesics; Repulsion; MOTION;

D O I：

10.1016/j.astropartphys.2017.08.002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Comments are due on a recent paper by McGruder III (2017) in which the author deals with the concept of gravitational repulsion in the context of the Schwarzschild-Droste solution. Repulsion (deceleration) for ingoing particles into a black hole is a concept proposed several times starting from Droste himself in 1916. It is a coordinate effect appearing to an observer at a remote distance from the black hole and when coordinate time is employed. Repulsion has no bearing and relation to the local physics of the black hole, and moreover it cannot be held responsible for accelerating outgoing particles. Thereby, the energy boost of cosmic rays cannot be produced by repulsion. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：42 / 43

页数：2