Future Evolution of Cosmic Structure in an Accelerating Universe | Zendy

Michael T. Busha | Zendy; Fred C. Adams | Zendy; Risa H. Wechsler | Zendy; A. E. Evrard | Zendy

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Future Evolution of Cosmic Structure in an Accelerating Universe

Author(s) -

Michael T. Busha,

Fred C. Adams,

Risa H. Wechsler,

A. E. Evrard

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/378043

Subject(s) - quintessence , physics , dark energy , cosmological constant , metric expansion of space , metric (unit) , universe , astrophysics , cosmic cancer database , theoretical physics , cold dark matter , structure formation , vacuum energy , dark matter , cosmology , operations management , galaxy , economics

Current cosmological data indicate that our universe contains a substantialcomponent of dark vacuum energy that is driving the cosmos to accelerate. Weexamine the immediate and longer term consequences of this dark energy (assumedhere to have a constant density). Using analytic calculations and supportingnumerical simulations, we present criteria for test bodies to remain bound toexisting structures. We show that collapsed halos become spatially isolated anddynamically relax to a particular density profile with logarithmic slopesteeper than -3 at radii beyond r_200. The asymptotic form of the space-timemetric is then specified. We develop this scenario further by determining theeffects of the accelerating expansion on the background radiation fields andindividual particles. In an appendix, we generalize these results to includequintessence.Comment: 12 pages, 6 figures. Submitted to ApJ on April 23, 200

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