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New tests of local Lorentz invariance and local position invariance of gravity with pulsars
Lijing Shao, Norbert Wex, Michael Kramer
New tests are proposed to constrain possible deviations from local Lorentz invariance and local position invariance in the gravity sector. By using precise timing results of two bi…
Can we see pulsars around Sgr A*? - The latest searches with the Effelsberg telescope
R. P. Eatough, M. Kramer, B. Klein +5
Radio pulsars in relativistic binary systems are unique tools to study the curved space-time around massive compact objects. The discovery of a pulsar closely orbiting the super-ma…
New Constraints on Preferred Frame Effects from Binary Pulsars
Lijing Shao, Norbert Wex, Michael Kramer
Preferred frame effects (PFEs) are predicted by a number of alternative gravity theories which include vector or additional tensor fields, besides the canonical metric tensor. In t…
New tests of local Lorentz invariance of gravity with small-eccentricity binary pulsars
Lijing Shao, Norbert Wex
In the post-Newtonian parametrization of semi-conservative gravity theories, local Lorentz invariance (LLI) violation is characterized by two parameters, alpha_1 and alpha_2. In bi…
Tests of the universality of free fall for strongly self-gravitating bodies with radio pulsars
Paulo C. C. Freire, Michael Kramer, Norbert Wex
In this paper, we review tests of the strong equivalence principle (SEP) derived from pulsar-white dwarf data. The extreme difference in binding energy between both components and…
The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
Paulo C. C. Freire, Norbert Wex, Gilles Esposito-Farèse +7
(abridged) We report the results of a 10-year timing campaign on PSR J1738+0333, a 5.85-ms pulsar in a low-eccentricity 8.5-hour orbit with a low-mass white dwarf companion (...) T…