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Cosmological constraints on the dark energy equation of state and its evolution
Open accessAbstract
We have calculated constraints on the evolution of the equation of state of the dark energy, w ( z ), from a joint analysis of data from the cosmic microwave background, large scale structure and type-Ia supernovae. In order to probe the time evolution of w we propose a new, simple parametrization of w , which has the advantage of being transparent and simple to extend to more parameters as better data become available. Furthermore it is well behaved in all asymptotic limits. Based on this parametrization we find that w ( z = 0) = −1.43 −0.38 +0.16 and d w /d z ( z = 0) = 1.0 −0.8 +1.0 . For a constant w we find that -1.34 ⩽ w ⩽ -0.79 at 95% CL. Thus, allowing for a time-varying w shifts the best fit present day value of w down. However, even though models with time variation in w yield a lower χ 2 than pure ΛCDM models, they do not have a better goodness-of-fit. Rank correlation tests on supernova data also do not show any need for a time-varying w .
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Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Riess, A. G., Filippenko, A. V., Challis, P., Clocchiatti, A., Diercks, A., Garnavich, P. M., Gilliland, R. L., Hogan, C. J., Jha, S., Kirshner, R. P., et al. (1998) · The Astronomical Journal · doi:10.1086/300499 · Cited by 19,704
Measurements of Ω and Λ from 42 High‐Redshift Supernovae
Perlmutter, S., Aldering, G., Goldhaber, G., Knop, R. A., Nugent, P., Castro, P. G., Deustua, S., Fabbro, S., Goobar, A., Groom, D. E., et al. (1999) · The Astrophysical Journal · doi:10.1086/307221 · Cited by 18,062
Spergel, D. N., Verde, L., Peiris, H. V., Komatsu, E., Nolta, M. R., Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377226 · Cited by 10,976
Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., Limon, M., Meyer, S. S., Page, L., Spergel, D. N., Tucker, G. S., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377253 · Cited by 4,860
Riess, A. G., Strolger, L., Tonry, J., Casertano, S., Ferguson, H. C., Mobasher, B., Challis, P., Filippenko, A. V., Jha, S., Li, W., et al. (2004) · The Astrophysical Journal · doi:10.1086/383612 · Cited by 4,315
Cosmological consequences of a rolling homogeneous scalar field
Ratra, B., & Peebles, P. J. E. (1988) · Physical Review D · doi:10.1103/physrevd.37.3406 · Cited by 4,310
Exploring the Expansion History of the Universe
Linder, E. V. (2003) · Physical Review Letters · doi:10.1103/physrevlett.90.091301 · Cited by 2,526
Armendáriz-Picón, C., Damour, T., & Mukhanov, V. (1999) · Physics Letters B · doi:10.1016/s0370-2693(99)00603-6 · Cited by 1,846
Kogut, A., Spergel, D. N., Barnes, C., Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Limon, M., Meyer, S. S., Page, L., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377219 · Cited by 938
The phantom menaced: Constraints on low-energy effective ghosts
Cline, J. M., Jeon, S., & Moore, G. D. (2004) · Physical Review D · doi:10.1103/physrevd.70.043543 · Cited by 677
Cited by
Extended theories of gravity and their cosmological and astrophysical applications
Capozziello, S., & Francaviglia, M. (2008) · General Relativity and Gravitation · doi:10.1007/s10714-007-0551-y · Cited by 874
Quintom cosmology: Theoretical implications and observations
Cai, Y.-F., Saridakis, E. N., Setare, M. R., & Xia, J.-Q. (2010) · Physics Reports · doi:10.1016/j.physrep.2010.04.001 · Cited by 868
Capozziello, S., Nojiri, S., Odintsov, S. D., & Troisi, A. (2006) · Physics Letters B · doi:10.1016/j.physletb.2006.06.034 · Cited by 745
BeyondΛCDM: Problems, solutions, and the road ahead
Bull, P., Akrami, Y., Adamek, J., Baker, T., Bellini, E., Beltrán Jiménez, J., Bentivegna, E., Camera, S., Clesse, S., Davis, J. H., et al. (2016) · Physics of the Dark Universe · doi:10.1016/j.dark.2016.02.001 · Cited by 567
Self-citationReconciling dark energy models withf(R)theories
Capozziello, S., Cardone, V. F., & Troisi, A. (2005) · Physical Review D · doi:10.1103/physrevd.71.043503 · Cited by 527
Metadata
- Authors
- Hannestad, S., & Mörtsell, E.
- Venue
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Published
- 2004-09-04
- Volume
- 2004
- Issue
- 09
- Pages
- 001-001
- ISSN
- 1475-7508 (ISSN-L)
- 1475-7516
- OpenAlex
- W1971604891
- Cited by
- 170
- References
- 10
- FWCI
- 17.92
- Type
- journal article
- Language
- en
- Open access
- bronze
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