2015
DOI: 10.1093/mnras/stv1700
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Abstract: Unified dark matter models are appealing in that they describe the dark sector in terms of a single component. They however face problems when attempting to account for structure formation: in the linear regime, density fluctuations can become Jeans stable and oscillate rather than collapse, though it is possible that this difficulty may be circumvented by invoking nonlinear clustering. Here we examine the behaviour in the fully nonlinear regime, of collapsed objects that should mimic standard dark matter halo… Show more

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Cited by 4 publications
(6 citation statements)
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References 46 publications
(34 reference statements)
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“…Negative values for α are also found for a flat universe by including gamma-ray bursts data [24], however, the reliability of these data is strongly debated. To be compatible with the rotation curves of galaxies, dark matter haloes consisting of pure generalised Chaplygin gas should satisfy α 0.0001 [25].…”
Section: +0067mentioning
confidence: 99%
See 1 more Smart Citation
“…Negative values for α are also found for a flat universe by including gamma-ray bursts data [24], however, the reliability of these data is strongly debated. To be compatible with the rotation curves of galaxies, dark matter haloes consisting of pure generalised Chaplygin gas should satisfy α 0.0001 [25].…”
Section: +0067mentioning
confidence: 99%
“…This generated again a large interest in the Chaplygin cosmologies and its variants, see e. g. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Most papers assume a flat universe when the allowed parameter space is estimated according to various cosmological data.…”
Section: Introductionmentioning
confidence: 99%
“…It is also worth mentioning [36] which has pointed out the importance of including an independent baryon fluid in the analyses involving a GCG. After these first works, many other authors have discussed the viability of GCG models in a fully consistent cosmological setup [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. While a GCG cosmology is slightly disfavoured with respect to standard ΛCDM, models featuring small values of α (i.e.…”
Section: Introductionmentioning
confidence: 99%
“…Indeed it is possible to construct unified dark matter models (UDM) associating both dark components with a single unknown substance. Concrete examples of effective UDM theories are provided by models based on the equation of state of the generalized Chaplygin gas (gCg) [17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32].…”
Section: Introductionmentioning
confidence: 99%
“…[24], to qualify as a dark-matter component as well it should be able to form dark-matter like halos in galaxies and galaxy clusters to explain the measured angular velocity distribution of stars in galaxies and the non-virial motion of galaxies in clusters. In this paper we address the question how to model spherical gCg halos and derive their short-and long-range properties to allow comparison with observational constraints on dark matter and dark energy; earlier work on these topics can be found in [26,28,29].…”
Section: Introductionmentioning
confidence: 99%