Paper: astro-ph/0509090
Date: Mon, 5 Sep 2005 14:56:35 GMT (14kb)

Title: The Dark Gravity model predictions for Gravity Probe B

Authors: Frederic Henry-Couannier
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In Ref. \refcite{fhc1} the parity, time reversal and space/time exchange
invariant actions, equations and their conjugate metric solutions were obtained
in the context of a general relativistic model modified in order to take into
account discrete symmetries. The equations are not covariant and the PPN
formalism breaksdown however the new Schwarzschild metric solution in vacuum
only starts to differ from that of General Relativity at the
Post-Post-Newtonian order in the privileged frame. In one version of the model,
preferred frame gravitomagnetic effects wich in some cases can be well above
expectations from the PPN formalism and within the accuracy of the Gravity
Probe B experiment are predicted instead of the frame dragging effect while in
the other version, we dont expect any discrepency with GR predictions.

\\ ( http://arXiv.org/abs/astro-ph/0509090 , 14kb)

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Paper: astro-ph/0509091
Date: Mon, 5 Sep 2005 15:12:21 GMT (54kb)

Title: DIM light on Black Hole X-ray Transients

Authors: Guillaume Dubus

Comments: 6 pages, 7 figures, sollicited talk for "Astrophysical Sources of
High Energy Particles and Radiation" (Torun, June 20-24, 2005), to be
published in AIP Proceedings Series
\\
The current model for the outburst of stellar-mass black holes X-ray binaries
is the disk instability model (DIM). An overview of this model and a discussion
of its theoretical and observational challenges are given.

\\ ( http://arXiv.org/abs/astro-ph/0509091 , 54kb)

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Paper: astro-ph/0509092
Date: Mon, 5 Sep 2005 15:22:13 GMT (13kb)

Title: Dark gravity and cosmology

Authors: F. Henry-Couannier, A. Tilquin, C. Tao, A. Ealet
\\
It has been shown that in the context of General Relativity (GR) enriched
with a new set of discrete symmetry reversal conjugate metrics, negative energy
states can be rehabilitated while avoiding the well-known instability issues.
We review here some cosmological implications of the model and confront them
with the supernovae and CMB data. The predicted flat universe constantly
accelerated expansion phase is found to be in rather good agreement with the
most recent cosmological data.

\\ ( http://arXiv.org/abs/astro-ph/0509092 , 13kb)

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Paper: astro-ph/0509093
Date: Mon, 5 Sep 2005 15:29:49 GMT (13kb)

Title: The dark gravity model and the formation of large scale structures

Authors: Frederic Henry-Couannier
\\
In gr-qc/0410055 the parity, time reversal and space/time exchange invariant
actions, equations and their conjugate metric solutions were obtained in the
context of a general relativistic model modified in order to take into account
discrete symmetries. The equations are not covariant and the PPN formalism
breaksdown however the new Schwarzschild metric solution in vacuum only starts
to differ from that of General Relativity at the Post-Post-Newtonian order in
the privileged frame.

A flat universe accelerated expansion phase was obtained without resorting to
inflation nor a cosmological constant and the Big-Bang singularity was avoided.
We review here the issue of large scale structures formation and galaxy
rotation curves in this new context and find that without any need for exotic
contributions such as dark matter or dark energy, the model is able to account
for the main observational results.

\\ ( http://arXiv.org/abs/astro-ph/0509093 , 13kb)