Please use this identifier to cite or link to this item: http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1916
Dynamics and constraints of the dissipative Liouville cosmology
Manolis Plionis
Acceso Abierto
Atribución-NoComercial-SinDerivadas
Cosmology
Dark matter
Dark energy
In this article we investigate the properties of the FLRW flat cosmological models in which the cosmic expansion of the Universe is affected by a dilaton dark energy (Liouville scenario). In particular, we perform a detailed study of these models in the light of the latest cosmological data, which serves to illustrate the phenomenological viability of the new dark energy paradigm as a serious alternative to the traditional scalar field approaches. By performing a joint likelihood analysis of the recent supernovae type Ia data (SNIa), the differential ages of passively evolving galaxies, and the Baryonic Acoustic Oscillations (BAOs) traced by the Sloan Digital Sky Survey (SDSS), we put tight constraints on the main cosmological parameters. Furthermore, we study the linear matter fluctuation field of the above Liouville cosmological models. In this framework, we compare the observed growth rate of clustering measured with those predicted by the current Liouville models. Performing a χ² statistical test we show that the Liouville cosmological model provides growth rates that match sufficiently well with the observed growth rate. To further test the viability of the models under study, we use the Press-Schechter formalism to derive their expected redshift distribution of cluster-size halos that will be provided by future X-ray and Sunyaev-Zeldovich cluster surveys. We find that the Hubble flow differences between the Liouville and the ɅCDM models provide a significantly different halo redshift distribution, suggesting that the models can be observationally distinguished.
Astroparticle Physics
21-05-2012
Artículo
Inglés
Estudiantes
Investigadores
Público en general
Basilakos, S., et al., (2012), Dynamics and constraints of the dissipative Liouville cosmology,  Astroparticle Physics, Vol. 36(1):1-15
ASTRONOMÍA Y ASTROFÍSICA
Versión aceptada
acceptedVersion - Versión aceptada
Appears in Collections:Artículos de Astrofísica

Upload archives


File SizeFormat 
5 Plionis_2012_APh36.pdf405.46 kBAdobe PDFView/Open