scholarly journals Model independent approach to the dark energy equation of state

2003 ◽  
Vol 67 (6) ◽  
Author(s):  
P. S. Corasaniti ◽  
E. J. Copeland
Keyword(s):  
Dark Energy ◽  
Equation Of State ◽  
Energy Equation ◽  
Model Independent

scholarly journals Measuring the Hubble function with standard candle clustering

2021 ◽  
Author(s):  
Luca Amendola ◽  
Miguel Quartin
Keyword(s):  
Dark Energy ◽  
Equation Of State ◽  
Power Spectrum ◽  
Energy Equation ◽  
Luminosity Distance ◽  
Distortion Parameter ◽  
Peculiar Velocities ◽  
Matter Power Spectrum ◽  
Standard Candle ◽  
Model Independent

Abstract Supernova Ia magnitude surveys measure the dimensionless luminosity distance H0DL. However, from the distances alone one cannot obtain quantities like H(z) or the dark energy equation of state, unless further cosmological assumptions are imposed. Here we show that by measuring the power spectrum of density contrast and of peculiar velocities of supernovae one can estimate also H(z)/H0 regardless of background or linearly perturbed cosmology and of galaxy-matter bias. This method, dubbed Clustering of Standard Candles (CSC) also yields the redshift distortion parameter β(k, z) and the biased matter power spectrum in a model-independent way. We forecast that an optimistic (pessimistic) LSST may be able to constrain H(z)/H0 to 5–13% (9–40%) in redshift bins of Δz = 0.1 up to at least z = 0.6.

scholarly journals Nonparametric reconstruction of the dark energy equation of state from diverse data sets

2011 ◽  
Vol 84 (8) ◽  
Author(s):  
Tracy Holsclaw ◽  
Ujjaini Alam ◽  
Bruno Sansó ◽  
Herbie Lee ◽  
Katrin Heitmann ◽  
...  
Keyword(s):  
Dark Energy ◽  
Equation Of State ◽  
Energy Equation ◽  
Data Sets ◽  
Diverse Data

scholarly journals Reconstruction of a kinetic k-essence Lagrangian from a modified of dark energy equation of state

2018 ◽  
Vol 78 (7) ◽  
Author(s):  
Víctor H. Cárdenas ◽  
Norman Cruz ◽  
Sebastian Muñoz ◽  
J. R. Villanueva
Keyword(s):  
Dark Energy ◽  
Equation Of State ◽  
Energy Equation

scholarly journals Scaling cosmology with variable dark-energy equation of state

2012 ◽  
Vol 2012 (06) ◽  
pp. 024-024 ◽  
Author(s):  
David R Castro ◽  
Hermano Velten ◽  
Winfried Zimdahl
Keyword(s):  
Dark Energy ◽  
Equation Of State ◽  
Energy Equation
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