13 citations · 29 across the 8 of their papers we have counts for
13 papers · 1 filter
A Mission to Explore the Pioneer Anomaly
The Pioneer Explorer Collaboration, H. Dittus, S. G. Turyshev +37
The Pioneer 10 and 11 spacecraft yielded the most precise navigation in deep space to date. These spacecraft had exceptional acceleration sensitivity. However, analysis of their ra…
Pioneer's Final Riddle
O. Bertolami, J. Páramos
Launched more than thirty years ago and now drifting in space with no further contact, the Pioneer 10 and 11 spacecraft are currently at the center of a small but developing concer…
Three Key Tests to Gravity
O. Bertolami
Three presumably unrelated open questions concerning gravity and the structure of the Universe are here discussed: 1) To which extent is Lorentz invariance an exact symmetry ? 2) W…
Hypothetical Gravity Control and Implications for Spacecraft Propulsion
O. Bertolami, M. Tajmar
A scientific analysis of the conditions under which gravity could be controlled and the implications that an hypothetical manipulation of gravity would have for known schemes of sp…
Quintessence with Coupled Scalar Fields
M. C. Bento, O. Bertolami, N. C. Santos
We discuss the dynamics of a quintessence model involving two coupled scalar fields. The model presents two types of solutions, namely solutions that correspond to eternal and tran…
Seed Magnetic Fields from the Breaking of Lorentz Invariance
O. Bertolami, D. F. Mota
Spontaneous breaking of Lorentz invariance may take place in string theories, possibly endowing the photon with a mass. This leads to the breaking of the conformal symmetry of the…