Pregled bibliografske jedinice broj: 618463
Generalized models of unification of dark matter and dark energy
Generalized models of unification of dark matter and dark energy // Physical Review D - Particles, Fields, Gravitation, and Cosmology, 87 (2013), 2; 023510-1 doi:10.1103/PhysRevD.87.023510 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 618463 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Generalized models of unification of dark matter and dark energy
Autori
Čaplar, Neven ; Štefančić, Hrvoje
Izvornik
Physical Review D - Particles, Fields, Gravitation, and Cosmology (1550-7998) 87
(2013), 2;
023510-1
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Chaplygin gas; dark mater; dark energy; unified model
Sažetak
A model of unification of dark matter and dark energy based on the modeling of the speed of sound as a function of the parameter of the equation of state is introduced. It is found that the model in which the speed of sound depends on the power of the parameter of the equation of state, cs2=α(-w)γ, contains the generalized Chaplygin gas models as its subclass. An effective scalar field description of the model is obtained in a parametric form which in some cases can be translated into a closed form solution for the scalar field potential. A constraint on model parameters is obtained using the observational data on the Hubble parameter at different redshifts.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
098-0982930-2864 - Fundamentalne interakcije u fizici elementarnih čestica i kozmologiji (Duplančić, Goran, MZOS ) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb
Profili:
Hrvoje Štefančić
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
