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Revisiting LS I +61 303 with VLBI astrometry
Y. W. Wu, G. Torricelli-Ciamponi, M. Massi +4
We conducted multi-epoch VLBA phase reference observations of LS I +61 303 in order to study its precessing radio jet. Compared to similar observations in 2006, we find that the ob…
Follow up of GW170817 and its electromagnetic counterpart by Australian-led observing programs
I. Andreoni, K. Ackley, J. Cooke +122
The discovery of the first electromagnetic counterpart to a gravitational wave signal has generated follow-up observations by over 50 facilities world-wide, ushering in the new era…
An effective action model of dynamically scalarizing binary neutron stars
Noah Sennett, Lijing Shao, Jan Steinhoff
Gravitational waves can be used to test general relativity (GR) in the highly dynamical strong-field regime. Scalar-tensor theories of gravity are natural alternatives to GR that c…
An independent test on the local position invariance of gravity with the triple pulsar PSR J0337+1715
Lijing Shao
We design a direct test of the local position invariance (LPI) in the post-Newtonian gravity, using the timing observation of the triple pulsar, PSR J0337+1715. The test takes adva…
A Bayesian Framework to Constrain the Photon Mass with a Catalog of Fast Radio Bursts
Lijing Shao, Bing Zhang
A hypothetical photon mass, , gives an energy-dependent light speed in a Lorentz-invariant theory. Such a modification causes an additional time delay between photons of diffe…
Constraining nonperturbative strong-field effects in scalar-tensor gravity by combining pulsar timing and laser-interferometer gravitational-wave detectors
Lijing Shao, Noah Sennett, Alessandra Buonanno +2
Pulsar timing and gravitational-wave (GW) detectors are superb laboratories to study gravity theories in the strong-field regime. Here we combine those tools to test the mono-scala…