Dynamics of pairwise motions

Juszkiewicz, Roman; Springel, Volker; Durrer, Ruth

doi:10.1086/312055

Scientific article

English

Dynamics of pairwise motions

Contributors

Juszkiewicz, Roman; Springel, Volker; Durrer, Ruth

Published in

The astrophysical journal. Letters, vol. 518, p. L25-L28

Publication date

1999

Abstract

We propose a simple closed-form expression relating [...] the mean relative velocity of pairs of galaxies at fixed separation r—to the two-point correlation function of mass density fluctuations,[...]. Our Ansatz is an interpolation between the perturbative and stable clustering expressions for [...]. We compare our analytic model for [...] with N-body simulations and find excellent agreement in the entire dynamical range probed by the simulations ([...]). Our results can be used to estimate the cosmological density parameter, Ω, directly from redshift-distance surveys.

Keywords

cosmology: observations
cosmology: theory
galaxies: kinematics and dynamics

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique théorique

Citation (ISO format)

JUSZKIEWICZ, Roman, SPRINGEL, Volker, DURRER, Ruth. Dynamics of pairwise motions. In: The astrophysical journal. Letters, 1999, vol. 518, p. L25–L28. doi: 10.1086/312055

Article (Accepted version)

Identifiers

PID : unige:974
DOI : 10.1086/312055

Journal ISSN

2041-8205

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Creation

26/02/2009 16:59:47

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26/02/2009 16:59:47

Update

14/03/2023 15:01:16

Status update

14/03/2023 15:01:16

Last indexation

29/10/2024 11:13:37

Dynamics of pairwise motions

Contributors

Published in

Publication date

Abstract

Keywords

UNIGE affiliation entities

Citation (ISO format)

Main files (1)

Identifiers

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation