Robust and model-independent cosmological constraints from distance measurements

@article{Zhai2019RobustAM,
  title={Robust and model-independent cosmological constraints from distance measurements},
  author={Zhongxu Zhai and Yun Wang},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2019}
}
We present a systematic analysis of the cosmological constraints from the "Pantheon Sample" of 1048 Type Ia Supernovae (SNe Ia) in the redshift range 0.01<z<2.3 compiled by Scolnic et al. (2018). Applying the flux-averaging method for detecting unknown systematic effects, we find that the "Pantheon" sample has been well calibrated and the bias caused by unknown systematic errors has been minimized. We present the estimate of distances measured from SNe Ia and reconstruct the expansion history… Expand
The Next Generation of Cosmological Measurements with Type Ia Supernovae
While Type Ia Supernovae (SNe Ia) are one of the most mature cosmological probes, the next era promises to be extremely exciting in the number of different ways SNe Ia are used to measure variousExpand
Constraints on alternative cosmological models from clustering and redshift-space distortions
In this Thesis I have exploited the most recent observational data from CMB, BAO and growth rate of LSS as well as N-body simulations of modified gravity, to investigate the spatial properties of theExpand
4D Gauss–Bonnet gravity: Cosmological constraints, H0 tension and large scale structure
We perform correct and reasonable cosmological constraints on the newly proposed 4D GaussBonnet gravity. Using the joint constraint from cosmic microwave background, baryon acoustic oscillations,Expand
Cosmological constraints of phantom dark energy models
We address three genuine phantom dark energy models where each of them induces the particular future events known as Big Rip, Little Rip and Little Sibling of the Big Rip. The background models areExpand
Forecasting cosmological bias due to local gravitational redshift
When photons from distant galaxies and stars pass through our neighboring environment, the wavelengths of the photons would be shifted by our local gravitational potential. This local gravitationalExpand
Machine learning improved fits of the sound horizon at the baryon drag epoch
The baryon acoustic oscillations (BAO) have proven to be an invaluable tool in constraining the expansion history of the Universe at late times and are characterized by the comoving sound horizon atExpand
The Hubble Tension, the M Crisis of Late Time H(z) Deformation Models and the Reconstruction of Quintessence Lagrangians
We present a detailed and pedagogical analysis of recent cosmological data, including CMB, BAO, SnIa and the recent local measurement of H0. We thus obtain constraints on the parameters of theseExpand
Cosmological constraints on GUP from modified Friedmann equations
The Generalized Uncertainty Principle (GUP) has emerged in numerous attempts to a theory of quantum gravity and predicts the existence of a minimum length in Nature. In this work, we consider twoExpand
Studies on dark energy evolution
In this work we explore signatures of evolution for the dark energy density X(z) = ρ de (z)/ρ de (0) using latest observations on SNIa and H(z). The models consist of parametrizations of the darkExpand
Evaporating primordial black holes as varying dark energy
If light enough primordial black holes account for dark matter, then its density decreases with time as they lose mass via Hawking radiation. We show that this time-dependence of the matter densityExpand
...
1
2
...

References

SHOWING 1-10 OF 88 REFERENCES
First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses a subsample of 207Expand
OBSERVATIONAL EVIDENCE FROM SUPERNOVAE FOR AN ACCELERATING UNIVERSE AND A COSMOLOGICAL CONSTANT
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods thatExpand
Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
Aims. We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations. The dataset includes several low-redshiftExpand
SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY
We combine high-redshift Type Ia supernovae from the first three years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-qualityExpand
Reconciling Planck with the local value of H0 in extended parameter space
The recent determination of the local value of the Hubble constant by Riess et al., 2016 (hereafter R16) is now 3.3 sigma higher than the value derived from the most recent CMB anisotropy dataExpand
An Evaluation of Cosmological Models from the Expansion and Growth of Structure Measurements
We compare a large suite of theoretical cosmological models to observational data from the cosmic microwave background, baryon acoustic oscillation measurements of expansion, Type Ia SNe measurementsExpand
Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae
Current cosmological analyses which use Type Ia supernova (SN Ia) observations combine SN samples to expand the redshift range beyond that of a single sample and increase the overall sample size. TheExpand
Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples
We present a new technique to create a bin-averaged Hubble Diagram (HD) from photometrically identified SN~Ia data. The resulting HD is corrected for selection biases and contamination from coreExpand
Model-independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data
We reconstruct the dark energy density X(z) as a free function from current Type Ia supernova (SN Ia) data, together with the cosmic microwave background (CMB) shift parameter from CMB data from theExpand
Quantifying discordance in the 2015 Planck CMB spectrum
We examine the internal consistency of the Planck 2015 cosmic microwave background (CMB) temperature anisotropy power spectrum. We show that tension exists between cosmological constant cold darkExpand
...
1
2
3
4
5
...