Spatial curvature at the sound horizon
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2020/02/034
Abstract: The effect of spatial curvature on primordial perturbations is controlled by $ \Omega_{K,0}/c_{s}^{2} $, where $ \Omega_{K,0} $ is today's fractional density of spatial curvature and $ c_{s} $ is the speed of sound during… read more here.
Keywords: spatial curvature; curvature sound; inflation; sound horizon ... See more keywords
Kinematic constraints on spatial curvature from supernovae Ia and cosmic chronometers
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa3426
Abstract: An approach to estimate the spatial curvature $\Omega_k$ from data independently of dynamical models is suggested, through kinematic parameterizations of the comoving distance ($D_{C}(z)$) with third degree polynomial, of the Hubble parameter ($H(z)$) with a… read more here.
Keywords: kinematic constraints; constraints spatial; curvature supernovae; spatial curvature ... See more keywords
Constraints on dark energy dynamics and spatial curvature from Hubble parameter and baryon acoustic oscillation data
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty1922
Abstract: We use all available baryon acoustic oscillation distance measurements and Hubble parameter data to constrain the cosmological constant $\Lambda$, dynamical dark energy, and spatial curvature in simple cosmological models. We find that the consensus spatially… read more here.
Keywords: baryon acoustic; hubble parameter; energy; acoustic oscillation ... See more keywords
General cosmography model with spatial curvature
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz3308
Abstract: We adopt a cosmographic approach in order to determine spatial curvature (i.e. Ω_K), combining the latest release of cosmic chronometer (CC) data, the Pantheon sample of Type Ia supernovae observations and baryon acoustic oscillation measurements.… read more here.
Keywords: general cosmography; cosmography model; model spatial; spatial curvature ... See more keywords
Dynamical spatial curvature as a fit to Type Ia supernovae
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Modern Physics D"
DOI: 10.1142/s0218271819501438
Abstract: Few statements in cosmology can be made without assuming a cosmological model within which to interpret data. Statements about cosmic acceleration are no exception to this rule, and the inferred positive volume acceleration of our… read more here.
Keywords: cosmology; spatial curvature; dynamical spatial; supernovae ... See more keywords
Little Rip, Pseudo Rip and bounce cosmology from generalized equation of state in the Universe with spatial curvature
Sign Up to like & getrecommendations! Published in 2023 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887823502043
Abstract: We consider the Little Rip (LR), Pseudo Rip (PR) and bounce cosmological models in the Friedmann-Robertson-Walker (FRW) metric with nonzero spatial curvature. We describe the evolution of the universe using a generalized equation of state… read more here.
Keywords: rip; generalized equation; spatial curvature; cosmology ... See more keywords