A Measurement of the Angular Power Spectrum of the Cosmic Microwave Background from [CLC][ITAL]l[/ITAL][/CLC] = 100 to 400

Miller, Amber; Caldwell, Robert R.; Devlin, Mark J.; Dorwart, W. B.; Herbig, T.; Nolta, M. R.; Page, Lyman A.; Puchalla, Jason; Torbet, E.; Tran, Hung V.

doi:10.1086/312293

Cited by 367 publications

(117 citation statements)

References 22 publications

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“…Observations support homogeneous and isotropic model of the late universe, given by the lineelement [4] …”

Section: Basic Equationssupporting

confidence: 52%

“…Later on in [6] using branegravity(BG), singularity free phantom driven cosmic acceleration was obtained. Also, observations support homogeneous and flat model of the universe [4]. The phantom model explains the present and future acceleration of the universe, but it is plagued with the problem of big-rip singularity ( singularity in finite future time when energy density, pressure and the scale factor diverge).…”

mentioning

confidence: 80%

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Non-Linear Equation of State and Effective Phantom Divide in Brane Models

2010

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Here, DGP model of brane-gravity is analyzed and compared with the standard general relativity and Randall-Sundrum cases using non-linear equation of state. Phantom fluid is known to violate the weak energy condition. In this paper, it is found that this characteristic of phantom energy is affected drastically by the negative brane-tension λ of the RS-II model. It is found that in DGP model strong energy condition(SEC) is always violated and the universe accelerates only where as in RS-II model even SEC is not violated for 1 < ρ/λ < 2 and the universe decelerates.

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“…Observations support homogeneous and isotropic model of the late universe, given by the lineelement [4] …”

Section: Basic Equationssupporting

confidence: 52%

mentioning

confidence: 80%

Non-Linear Equation of State and Effective Phantom Divide in Brane Models

2010

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“…Early results from the 2dF Galaxy Redshift Survey (2dFGRS) (Percival et al, 2001;Efstathiou et al, 2002;Percival et al, 2002) and the Abell/ACO cluster sample (Miller et al, 1999) gave hints of the acoustic feature in the power spectrum. However, the first convincing detections of BAO came in 2005 from the SDSS Data Release 3 (DR3) and final 2dFGRS samples Cole et al, 2005).…”

Section: The Current State Of Playmentioning

confidence: 99%

Observational probes of cosmic acceleration

et al. 2013

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The accelerating expansion of the universe is the most surprising cosmological discovery in many decades, implying that the universe is dominated by some form of "dark energy" with exotic physical properties, or that Einstein's theory of gravity breaks down on cosmological scales. The profound implications of cosmic acceleration have inspired ambitious efforts to understand its origin, with experiments that aim to measure the history of expansion and growth of structure with percent-level precision or higher. We review in detail the four most well established methods for making such measurements: Type Ia supernovae, baryon acoustic oscillations (BAO), weak gravitational lensing, and the abundance of galaxy clusters. We pay particular attention to the systematic uncertainties in these techniques and to strategies for controlling them at the level needed to exploit "Stage IV" dark energy facilities such as BigBOSS, LSST, Euclid, and WFIRST. We briefly review a number of other approaches including redshift-space distortions, the Alcock-Paczynski effect, and direct measurements of the Hubble constant H 0 . We present extensive forecasts for constraints on the dark energy equation of state and parameterized deviations from General Relativity, achievable with Stage III and Stage IV experimental programs that incorporate supernovae, BAO, weak lensing, and cosmic microwave background data. We also show the level of precision required for clusters or other methods to provide constraints competitive with those of these fiducial programs. We emphasize the value of a balanced program that employs several of the most powerful methods in combination, both to cross-check systematic uncertainties and to take advantage of complementary information. Surveys to probe cosmic acceleration produce data sets that support a wide range of scientific investigations, and they continue the longstanding astronomical tradition of mapping the universe in ever greater detail over ever larger scales.

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“…There is now substantial evidence that the universe has flat spatial sections [36] and therefore from now on we restrict ourselves to the spatially flat case K = 0. In this case one can choose H and φ as dynamical variables -this is not possible if K = 0, in which case one has to consider as dynamical variable the scale factor a appearing in the field equations through the terms ±K/a 2 instead of H. However when K = 0 these terms disappear and a appears only in the combination H =ȧ/a and in its time derivatives (in non-linear gravity the field equations are of fourth order andḦ and ··· H appear in the field equations).…”

Section: Introductionmentioning

confidence: 99%

de Sitter attractors in generalized gravity

Faraoni

2004

Phys. Rev. D

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We obtain conditions for the existence and stability of de Sitter attractors in the phase space of homogeneous and isotropic cosmology in generalized theories of gravity (including non-linear and scalar-tensor theories). These conditions are valid for any form of the coupling functions of the theory. Stability with respect to inhomogeneous perturbations is analyzed using a covariant and gauge-invariant formalism. The relevance for inflationary scenarios of the early universe and for quintessence models of the present era is discussed.

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A Measurement of the Angular Power Spectrum of the Cosmic Microwave Background from [CLC][ITAL]l[/ITAL][/CLC] = 100 to 400

Cited by 367 publications

References 22 publications

Non-Linear Equation of State and Effective Phantom Divide in Brane Models

Non-Linear Equation of State and Effective Phantom Divide in Brane Models

Observational probes of cosmic acceleration

de Sitter attractors in generalized gravity

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