# On the Reality of the Accelerating Universe

@article{Mszros2002OnTR, title={On the Reality of the Accelerating Universe}, author={Attila M{\'e}sz{\'a}ros}, journal={The Astrophysical Journal}, year={2002}, volume={580}, pages={12 - 15} }

Two groups recently deduced the positive value for the cosmological constant, concluding at a high (≥99%) confidence level that the universe should be accelerating. This conclusion followed from the statistical analysis of dozens of high-redshift supernovae. In this paper this conclusion is discussed. From the conservative frequentist's point of view, the validity of the null hypothesis of the zero cosmological constant is tested by the classical statistical χ2 test for the 60 supernovae listed…

## 11 Citations

Cosmological Parameters: Where are we?

- Physics
- 2004

The present-day large increase of the amount of data relevant to cosmology, as well as their increasing accuracy, leads to the idea that the determination of cosmological parameters has been achieved…

Constraints on the Cardassian Scenario from the Expansion Turnaround Redshift and the Sunyaev-Zeldovich/X-Ray Data

- Physics
- 2004

Cosmic acceleration is one of the most remarkable cosmological findings of recent years. Although a dark energy component has usually been invoked as the mechanism for the acceleration, a…

A possible interrelation between the estimated luminosity distances and internal extinctions of type Ia supernovae

- Physics
- 2006

We studied the statistical properties of the luminosity distance and internal extinction data of type Ia supernovae in the lists published by Tonry et al. (2003) and Barris et al. (2004). After…

A check on the Cardassian expansion model with type-Ia supernovae data

- Physics
- 2003

We use the magnitude-redshift relation for the type Ia supernova data compiled by Riess et al. to analyze the Cardassian expansion scenario. This scenario assumes the universe to be flat, matter…

Quintessence or phantom: Study of scalar field dark energy models through a general parametrization of the Hubble parameter

- PhysicsPhysics of the Dark Universe
- 2022

A curious relation between the flat cosmological model and the elliptic integral of the first kind

- Physics
- 2013

Context. The dependence of the luminosity distance on the redshift has a key importance in the cosmology. This dependence can well be given by standard functions for the zero cosmological constant.…

Dark energy and flatness from observational H(z)+WMAP constraint

- Physics
- 2009

We analyse the dark energy problem using observational H(z) data plus the curvature constraint given by WMAP. After a non-parametric statistical study covering the most probable range of Ωm0 and H0…

Redshift distribution of gamma-ray bursts and star formation rate

- Physics
- 2006

Aims. The redshift distribution of gamma-ray bursts collected in the BATSE Catalog is compared with the star formation rate.We aim to clarify the accordance between them. We also study the case of…

Pokroky matematiky, fyziky a astronomie

- Physics
- 2012

Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons.…

Kilonova afterglow rate from spherical and axisymmetrical models

- PhysicsAstronomische Nachrichten
- 2019

## References

SHOWING 1-10 OF 29 REFERENCES

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

- Physics
- 1998

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 that…

Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova

- Physics
- 2000

We have measured the rest-frame B-, V-, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z = 0.46), using the Hubble Space Telescope (HST) and ground-based…

Type Ia Supernovae, Evolution, and the Cosmological Constant

- Physics
- 2000

We explore the possible role of evolution in the analysis of data on Type Ia supernovae (SNe Ia) at cosmological distances. First, using a variety of simple sleuthing techniques, we find evidence…

Measurements of Ω and Λ from 42 High-Redshift Supernovae

- Physics
- 1998

We report measurements of the mass density, ΩM, and cosmological-constant energy density, ΩΛ, of the universe based on the analysis of 42 type Ia supernovae discovered by the Supernova Cosmology…

The Farthest Known Supernova: Support for an Accelerating Universe and a Glimpse of the Epoch of Deceleration

- Physics
- 2001

We present photometric observations of an apparent Type Ia supernova (SN Ia) at a redshift of ~1.7, the farthest SN observed to date. The supernova, SN 1997ff, was discovered in a repeat observation…

The Most Massive Distant Clusters: Determining Ω and σ8

- Physics
- 1998

The existence of the three most massive clusters of galaxies observed so far at z > 0.5 is used to constrain the mass density parameter of the universe, Ω, and the amplitude of mass fluctuations, σ8.…

The High-Z Supernova Search: Measuring Cosmic Deceleration and Global Curvature of the Universe Using Type Ia Supernovae

- Physics
- 1998

The High-Z Supernova Search is an international collaboration to discover and monitor Type Ia supernovae (SNe Ia) at z > 0.2 with the aim of measuring cosmic deceleration and global curvature. Our…

Median Statistics, H0, and the Accelerating Universe

- Physics
- 2000

We develop median statistics that provide powerful alternatives to χ2 likelihood methods and require fewer assumptions about the data. Application to astronomical data demonstrates that median…

The Case for an Accelerating Universe from Supernovae

- Physics
- 2000

The unexpected faintness of high‐redshift Type Ia supernovae (SNe Ia), as measured by two teams, has been interpreted as evidence that the expansion of the universe is accelerating. We review the…

Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant

- Physics
- 1997

We present here the final results of the Hubble Space Telescope (HST) Key Project to measure the Hubble constant. We summarize our method, the results, and the uncertainties, tabulate our revised…