Authors: Massimo Cerdonio, Fabrizio De Marchi, Roberto De Pietri, Philippe Jetzer, Francesco Marzari, Giulio Mazzolo, Antonello Ortolan, Mauro Sereno
Date: 2 Feb 2010
Abstract: The analysis of non-radiative sources of static or time-dependent gravitational fields in the Solar System is crucial to accurately estimate the free-fall orbits of the LISA space mission. In particular, we take into account the gravitational effects of Interplanetary Dust (ID) on the spacecraft trajectories. The perturbing gravitational field has been calculated for some ID density distributions that fit the observed zodiacal light. Then we integrated the Gauss planetary equations to get the deviations from the LISA keplerian orbits around the Sun. This analysis can be eventually extended to Local Dark Matter (LDM), as gravitational fields are expected to be similar for ID and LDM distributions. Under some strong assumptions on the displacement noise at very low frequency, the Doppler data collected during the whole LISA mission could provide upper limits on ID and LDM densities.
© M. Vallisneri 2012 — last modified on 2010/01/29
Tantum in modicis, quantum in maximis