Pregled bibliografske jedinice broj: 268563
On the evolution of the cosmic-mass-density contrast and the cosmological constant
On the evolution of the cosmic-mass-density contrast and the cosmological constant // Il Nuovo Cimento B, 121 (2006), 129-136 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 268563 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On the evolution of the cosmic-mass-density contrast and the cosmological constant
Autori
Palle, Davor
Izvornik
Il Nuovo Cimento B (0369-3554) 121
(2006);
129-136
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
inhomogeneous cosmologies; cosmic-mass-density contrast
Sažetak
We study the evolution of the cosmic-mass-density contrast beyond the Robertson-Walker geometry including the small contribution of acceleration. We derive a second-order evolution equation for the density contrast within the spherical model for CDM collissionless fluid including the cosmological constant, the expansion and the non-vanishing four-vector of acceleration. While the mass-density is not seriously affected by acceleration, the mass-density contrast changes its shape at smaller redshifts even for a small amount of the acceleration parameter. This could help to resolve current controversial results in cosmology from measurements of WMAP, gravitational lensing, XMM-Newton X-ray cluster or type Ia supernovae data, etc.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- SCI-EXP, SSCI i/ili A&HCI
