Pregled bibliografske jedinice broj: 1140539
Purely kinetic k-essence description of c2s(w) barotropic fluid models
Purely kinetic k-essence description of c2s(w) barotropic fluid models // Physics of the Dark Universe, 32 (2021), 100827, 8 doi:10.1016/j.dark.2021.100827 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1140539 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Purely kinetic k-essence description of c2s(w)
barotropic fluid models
Autori
Perković, Dalibor ; Štefančić, Hrvoje
Izvornik
Physics of the Dark Universe (2212-6864) 32
(2021);
100827, 8
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
dark energy ; k-essence ; barotropic fluid ; dark matter ; unified dark sector
Sažetak
Purely kinetic k-essence models have been shown in the literature to be a field theory equivalent of barotropic fluid models of dark energy or dark matter–dark energy unification. In the modeling framework where the speed of sound squared of a barotropic fluid is modeled as a function of its Equation of State parameter, a systematic procedure of obtaining the Lagrangian density of an equivalent purely kinetic k-essence model is presented. As this modeling approach starts from the speed of sound, purely kinetic k-essence models can be constructed for which the speed of sound is in agreement with the observational constraints. Depending on the chosen functional form for the barotropic fluid speed of sound squared, analytically tractable examples of solutions for the purely kinetic k-essence Lagrangian density in parametric and closed form are obtained.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Zdravstveno veleučilište, Zagreb,
Hrvatsko katoličko sveučilište, Zagreb
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
