Near-horizon properties of trajectories with finite force relevant for Bañados-Silk-West effect

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10495262" target="_blank" >RIV/00216208:11320/24:10495262 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9NQwEeMonq" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9NQwEeMonq</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.110.064016" target="_blank" >10.1103/PhysRevD.110.064016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Near-horizon properties of trajectories with finite force relevant for Bañados-Silk-West effect

Popis výsledku v původním jazyce

According to the Ba &amp; ntilde;ados-Silk-West (BSW) effect, two particles moving toward a black hole can collide near the horizon with an unbounded energy in the center-of-mass frame. This requires one of the particles to have fine-tuned parameters in such a way that the time component of generalized momentum is zero X = 0. Thus the existence of such trajectories is a necessary condition for the BSW effect. However, it is insufficient since the forward-in-time condition requires X &gt; 0 outside the horizon. We examine this condition for different types of particles and horizons and find configurations for which the BSW effect is possible. In doing so, we take into account a finite force of unspecified nature exerted on particles. It includes relationships between numbers characterizing the rate with which four-velocity, acceleration, and metric functions change near the horizon. For some aforementioned relations, parameters of a system control the sign of X; in other cases they are required for X to be a real quantity. In the simplest case of free particles the BSW effect for the Kerr or Kerr-Newman black hole is impossible if a fine-tuned particle has a negative energy, so in this sense a combination of the Penrose process and the BSW effect is forbidden.

Název v anglickém jazyce

Near-horizon properties of trajectories with finite force relevant for Bañados-Silk-West effect

Popis výsledku anglicky

According to the Ba &amp; ntilde;ados-Silk-West (BSW) effect, two particles moving toward a black hole can collide near the horizon with an unbounded energy in the center-of-mass frame. This requires one of the particles to have fine-tuned parameters in such a way that the time component of generalized momentum is zero X = 0. Thus the existence of such trajectories is a necessary condition for the BSW effect. However, it is insufficient since the forward-in-time condition requires X &gt; 0 outside the horizon. We examine this condition for different types of particles and horizons and find configurations for which the BSW effect is possible. In doing so, we take into account a finite force of unspecified nature exerted on particles. It includes relationships between numbers characterizing the rate with which four-velocity, acceleration, and metric functions change near the horizon. For some aforementioned relations, parameters of a system control the sign of X; in other cases they are required for X to be a real quantity. In the simplest case of free particles the BSW effect for the Kerr or Kerr-Newman black hole is impossible if a fine-tuned particle has a negative energy, so in this sense a combination of the Penrose process and the BSW effect is forbidden.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

110

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

064016

Kód UT WoS článku

001381673800009

EID výsledku v databázi Scopus

2-s2.0-85203585642