scholarly journals Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces

2016 ◽  
Vol 459 (2) ◽  
pp. 1468-1488 ◽  
Author(s):  
A. J. Mead ◽  
C. Heymans ◽  
L. Lombriser ◽  
J. A. Peacock ◽  
O. I. Steele ◽  
...  
Keyword(s):  
Dark Energy ◽  
Power Spectra ◽  
Gravitational Forces ◽  
Massive Neutrinos

scholarly journals MGCAMB with massive neutrinos and dynamical dark energy

2019 ◽  
Vol 2019 (05) ◽  
pp. 001-001 ◽  
Author(s):  
A. Zucca ◽  
L. Pogosian ◽  
A. Silvestri ◽  
G.B. Zhao
Keyword(s):  
Dark Energy ◽  
Massive Neutrinos ◽  
Dynamical Dark Energy

scholarly journals Large-scale structure formation with massive neutrinos and dynamical dark energy

2014 ◽  
Vol 89 (10) ◽  
Author(s):  
Amol Upadhye ◽  
Rahul Biswas ◽  
Adrian Pope ◽  
Katrin Heitmann ◽  
Salman Habib ◽  
...  
Keyword(s):  
Dark Energy ◽  
Structure Formation ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Massive Neutrinos ◽  
Dynamical Dark Energy ◽  
Large Scale Structure Formation

scholarly journals Massive neutrinos and dark energy

2007 ◽  
Vol 168 ◽  
pp. 31-33 ◽  
Author(s):  
Paolo Serra ◽  
Rachel Bean ◽  
Axel De La Macorra ◽  
Alessandro Melchiorri
Keyword(s):  
Dark Energy ◽  
Massive Neutrinos

scholarly journals Consistent scalar and tensor perturbation power spectra in single fluid matter bounce with dark energy era

2018 ◽  
Vol 97 (8) ◽  
Author(s):  
Anna Paula Bacalhau ◽  
Nelson Pinto-Neto ◽  
Sandro Dias Pinto Vitenti
Keyword(s):  
Dark Energy ◽  
Power Spectra ◽  
Tensor Perturbation ◽  
Fluid Matter

scholarly journals f(R) GRAVITY AND ITS COSMOLOGICAL IMPLICATIONS

2011 ◽  
Vol 20 (08) ◽  
pp. 1347-1355 ◽  
Author(s):  
HAYATO MOTOHASHI ◽  
ALEXEI A. STAROBINSKY ◽  
JUN'ICHI YOKOYAMA
Keyword(s):  
Dark Energy ◽  
Power Spectrum ◽  
Growth Index ◽  
Matter Density ◽  
Cosmic Acceleration ◽  
Matter Power Spectrum ◽  
Density Perturbations ◽  
Massive Neutrinos ◽  
The Universe ◽  
Anomalous Growth

We have investigated the evolution of a homogeneous isotropic background of the Universe and inhomogeneous subhorizon matter density perturbations in viable f(R) models of present dark energy and cosmic acceleration analytically and numerically. It is found that viable f(R) models generically exhibit recent crossing of the phantom boundary w DE = -1. Furthermore, it is shown that the growth index of perturbations depends both on time and wavenumber. This anomalous growth may explain properties of the observational matter power spectrum from the SDSS data and can also partially counteract the spectrum suppression by massive neutrinos making larger values of the total sum of neutrino rest-masses possible.

scholarly journals SPATIAL RICCI SCALAR DARK ENERGY MODEL

2011 ◽  
Vol 26 (02) ◽  
pp. 317-329 ◽  
Author(s):  
RONG-JIA YANG ◽  
ZONG-HONG ZHU ◽  
FENGQUAN WU
Keyword(s):  
Dark Energy ◽  
Power Spectra ◽  
Ricci Scalar ◽  
Temperature Anisotropy ◽  
Microwave Background ◽  
Cosmic Microwave Background Temperature ◽  
Acceleration Of The Universe ◽  
Background Temperature ◽  
Best Fit ◽  
The Universe

Inspired by the holographic principle, we suggest that the density of dark energy is proportional to the spatial Ricci scalar curvature (SRDE). Such a model is phenomenologically viable. The best fit values of its parameters at 68% confidence level are found to be Ωm 0= 0.259±0.016 and α = 0.261±0.0122, constrained from the Union+CFA3 sample of 397 SNIa and the BAO measurement. We find that the equation of state of SRDE crosses -1 at z ≃ -0.14. The present value of the deceleration parameter q(z) for SRDE is found to be qz = 0~-0.85. The phase transition from deceleration to acceleration of the Universe for SRDE occurs at the redshift zq = 0~0.4. After studying the perturbation of each component of the Universe, we show that the matter power spectra and cosmic microwave background temperature anisotropy are slightly affected by SRDE, compared with ΛCDM.

Sign in / Sign up

Export Citation Format

Share Document