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- Arturo Serna
- 2002

In this paper, we analyze the conditions for convergence toward General Relativity of scalar-tensor gravity theories defined by an arbitrary coupling function α (in the Einstein frame). We show that, in general, the evolution of the scalar field (φ) is governed by two opposite mechanisms: an attraction mechanism which tends to drive scalar-tensor models… (More)

- Arturo Serna, J . M . Alimi
- 1995

We analyze the qualitative behaviors of scalar-tensor cosmologies with an arbitrary monotonic !( ) function. In particular, we are interested on scalartensor theories distinguishable at early epochs from General Relativity (GR) but leading to predictions compatible with solar-system experiments. After extending the method developed by Lorentz-Petzold and… (More)

- Arturo Serna
- 1997

In a previous paper (Serna & Alimi 1996b), we have pointed out the existence of some particular scalar-tensor gravity theories able to relax the nucleosynthesis constraint on the cosmic baryonic density. In this paper, we present an exhaustive study of primordial nucleosynthesis in the framework of such theories taking into account the currently adopted… (More)

- Trinidad León-Quinto, Miguel A. Simón, Rafael Cadenas, Africa Martínez, Arturo Serna
- Cryobiology
- 2014

Cryobanking somatic foetal cells acquire much relevance in endangered species for biodiversity conservation purposes. Such cells could be later used to reintroduce the lost genes into the breeding pool, by inducing pluripotency and/or nuclear transfer if necessary. Since requirements for preserving foetal cells are not always the same as for adult ones, we… (More)

- Arturo Serna
- 1996

The usual bulge/disk decomposition of the surface brightness distribution in disk galaxies generally gives good results for S0 galaxies, but often fails for more advanced types of the Hubble sequence. We propose in this paper that, in the case of spiral galaxies, a third component must be considered: the contribution of spiral arms. The functional form of… (More)

We study the stability of rotating collisionless self-gravitating spherical systems by using high resolution N-body experiments on a Connection Machine CM-5. We added rotation to Ossipkov-Merritt (hereafter OM) anisotropic spherical systems by using two methods. The first method conserves the anisotropy of the distribution function defined in the OM… (More)

- Arturo Serna
- 2008

We propose a new hierarchical method which uses dynamical arguments to nd and describe substruc-tures in galaxy clusters. This method (hereafter h{method or h{analysis) uses a hierarchical clustering analysis to determine the relationship between galaxies according to their relative binding energies. We have tested from N-body simulations, the two following… (More)

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