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

@article{Zhu2004ConstraintsOT,
  title={Constraints on the Cardassian Scenario from the Expansion Turnaround Redshift and the Sunyaev-Zeldovich/X-Ray Data},
  author={Zong-Hong Zhu and Masa-katsu Fujimoto},
  journal={The Astrophysical Journal},
  year={2004},
  volume={602},
  pages={12-17}
}
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 modification of the Friedmann equation from various higher dimensional models provides a feasible alternative. Cardassian expansion is one of these scenarios, in which the universe is flat, matter (and radiation) dominated, and accelerating but contains no dark energy component. This scenario is fully… Expand

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References

SHOWING 1-10 OF 114 REFERENCES
Future Type Ia Supernova Data as Tests of Dark Energy from Modified Friedmann Equations
In the Cardassian model, dark energy density arises from modifications to the Friedmann equation, which becomes H2 = g(ρM), where g(ρM) is a new function of the energy density. The universe is flat,Expand
Cardassian expansion: a model in which the universe is flat, matter dominated, and accelerating
Abstract A modification to the Friedmann–Robertson–Walker equation is proposed in which the universe is flat, matter dominated, and accelerating. An additional term, which contains only matter orExpand
Cosmology with the Sunyaev-Zel'dovich Effect
▪ Abstract The Sunyaev-Zel'dovich effect (SZE) provides a unique way to map the large-scale structure of the universe as traced by massive clusters of galaxies. As a spectral distortion of the cosmicExpand
Cardassian Expansion: Constraints from Compact Radio Source Angular Size versus Redshift Data
The Cardassian Expansion Scenario was recently proposed by Freese & Lewis as an alternative to a cosmological constant in explaining the current accelerating universe. In this paper we investigateExpand
Constraints on Cardassian Expansion from Distant Type Ia Supernovae
The distant Type Ia supernovae data compiled by Perlmutter et al. are used to analyze the Cardassian expansion scenario, which was recently proposed by Freese & Lewis as an alternative to aExpand
Cosmological implications of APM 08279+5255, an old quasar at z= 3.91
The existence of old high-redshift objects provides an important tool for constraining the expanding age of the Universe and the formation epoch of the first objects. In a recent paper, Hasinger,Expand
Exploring the expanding Universe and dark energy using the statefinder diagnostic
The coming few years are likely to witness a dramatic increase in high-quality supernova data as current surveys add more high-redshift supernovae to their inventory and as newer and deeper supernovaExpand
Generalized cardassian expansion: a model in which the universe is flat, matter dominated, and accelerating
Abstract The Cardassian universe is a proposed modification to the Friedmann Robertson Walker equation (FRW) in which the universe is flat, matter dominated, and accelerating. In this presentation,Expand
A check on the Cardassian expansion model with type-Ia supernovae data
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, matterExpand
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
...
1
2
3
4
5
...