PT5 - Testing gravitation theories in space |
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Speaker |
Di Pierri, Vincenzo |
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Coauthors |
Schettino, Giulia; Serra, Daniele; Tommei, Giacomo |
| Talk Title |
Testing torsion theories of gravity with the BepiColombo Radio Science Experiment |
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Abstract |
The parameterized post-Newtonian (PPN) formalism is a general metric theory of gravity depending upon 10 parameters, that describes well the experiments within the Solar System. In this work we introduce torsion theories, which are metric theories with non-vanishing torsion tensor, in their PPN expansion. In this framework we derived the equations of motion of a massive body including torsion, describing the dynamical effects by means of some torsion parameters to be added to the standard PN parameters. We will show how the torsion parameters can be estimated with the ESA-BepiColombo radio science experiment (RSE). To this aim, we implemented the torsion contribution to the dynamics in the ORBIT14 software, which is an orbit determination code specifically developed for the BepiColombo RSE by the Celestial Mechanics Group of the University of Pisa. We will show the results of a set of simulations performed with ORBIT14, with the aim of estimating the torsion parameters. We will also discuss the issues arising from correlations between PN and torsion parameters. |
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