Friction forces in cosmological models

doi:10.1140/epjc/s10052-013-2334-9

2013-02-26

DOI：10.1140/epjc/s10052-013-2334-9

原文链接

查看原文

摘要

En 中文

We investigate the dynamics of test particles undergoing friction forces in a Friedmann-Robertson-Walker (FRW) spacetime. The interaction with the background fluid is modeled by introducing a Poynting-Robertson-like friction force in the equations of motion, leading to measurable (at least in principle) deviations of the particle trajectories from geodesic motion. The effect on the peculiar velocities of the particles is investigated for various equations of state of the background fluid and different standard cosmological models. The friction force is found to have major effects on particle motion in closed FRW universes, where it turns the time-asymptotic value (approaching the recollapse) of the peculiar particle velocity from ultra-relativistic (close to light speed) to a co-moving one, i.e., zero peculiar speed. On the other hand, for open or flat universes the effect of the friction is not so significant, because the time-asymptotic peculiar particle speed is largely non-relativistic also in the geodesic case.

AI总结

对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。

期刊

European Physical Journal C

IF:

4.8

论文数:

1.8W

被引数:

4.7W

机构

consiglio nazionale delle ricerche (cnr)

学者数:

6.2W

论文数: 5.7W

被引数: 48

sapienza university rome

学者数:

6.3W

论文数: 4.7W

被引数: 381

引用论文

Gastrointestinal complications associated with ibuprofen therapy for patent ductus arteriosus

Journal of Perinatology

IF0

2011-01-20

PREAI

R Rao; K Bryowsky; J Mao; D Bunton; C McPherson; A Mathur

Conjugated linoleic acid accelerates weight loss and improves anthropometric measures in overweight young adult males during weight loss program 共轭亚油酸在减重计划中加速体重减轻并改善超重青年男性的体质测量指标。

Obesity and metabolism

IF0

2018-04-25

OAAI

Sameh S. Akkila

A NEW MEASUREMENT OF THE BULK FLOW OF X-RAY LUMINOUS CLUSTERS OF GALAXIES

ASTROPHYSICAL JOURNAL LETTERS

IF11.7

2010-03-04

166

OAAI

Kashlinsky, A.; Atrio-Barandela, F.; Ebeling, H.; Edge, A.; Kocevski, D.

Influence of nutrient density and lighting regime in broiler chickens: Effect on antioxidant status and immune functiona 肉鸡中营养密度和光照制度的影响：对抗氧化状态和免疫功能的影响a

British Poultry Science

IF0

2010-04-01

PREAI

Y.L. Guob; W.B. Li; J.L. Chen

Constraints on cosmological models from Hubble Space Telescope observations of high-z supernovae

ASTROPHYSICAL JOURNAL

IF5.4

1998-02-01

660

OAAI

Garnavich, PM; Kirshner, RP; Challis, P; Tonry, J; Gilliland, RL; Smith, RC; Clocchiatti, A; Diercks, A; Filippenko, AV; Hamuy, M; Hogan, CJ; Leibundgut, B; Phillips, MM; Reiss, D; Riess, AG; Schmidt, BP; Schommer, RA; Spyromilio, J; Stubbs, C; Suntzeff, NB; Wells, L

DEPARTMENT OF ERROR 错误部门

The Lancet

IF0

1998-04-01

OAAI

Hyperchloremia is independently associated with mortality in critically ill children who ultimately require continuous renal replacement therapy

Pediatric Nephrology

IF0

2018-02-05

PREAI

Matthew F. Barhight; Jennifer Lusk; John Brinton; Timothy Stidham; Danielle E. Soranno; Sarah Faubel; Jens Goebel; Peter M. Mourani; Katja M. Gist

Equilibrium morphology of block copolymer melts. 2

Macromolecules

IF0

2002-05-01

PREAI

Kyoji Kawasaki; Takao Ohta; Mitsuharu Kohrogui

Measurements of the cosmological parameters Omega and Lambda from the first seven supernovae at z>=0.35

ASTROPHYSICAL JOURNAL

IF5.4

1997-07-10

1.2K

OAAI

Perlmutter, S; Gabi, S; Goldhaber, G; Goobar, A; Groom, DE; Hook, IM; Kim, AG; Kim, MY; Lee, JC; Pain, R; Pennypacker, CR; Small, IA; Ellis, RS; McMahon, RG; Boyle, BJ; Bunclark, PS; Carter, D; Irwin, MJ; Glazebrook, K; Newberg, HJM; Filippenko, AV; Matheson, T; Dopita, M; Couch, WJ

Particle scattering by a test fluid on a Schwarzschild spacetime: the equation of state matters

EUROPEAN PHYSICAL JOURNAL C

IF4.8

2012-03-07

PREAI

Bini, Donato; Geralico, Andrea; Succi, Sauro

没有更多内容