5 papers
On Coordinate Frames in Axisymmetric Static Vacuum Spacetimes and Implications for Observations
Antonia Seifert
While a physical theory should be independent of the coordinate frame chosen by any observer, the observations themselves in fact depend on the choice of coordinates. In particular…
Lessons from binary dynamics of inspiralling equal-mass boson-star mergers
Tamara Evstafyeva, Antonia Seifert, Ulrich Sperhake +2
We explore the gravitational-wave phenomenology of equal-mass inspiralling boson-star binaries using numerical relativity simulations. In particular, we characterise the waveform d…
On the Evidence for Violation of the Equivalence Principle in Disk Galaxies
Corey Sargent, William Clark, Antonia Seifert +5
We examine the claimed observations of a gravitational external field effect (EFE) reported in Chae et al. We show that observations suggestive of the EFE can be interpreted withou…
Supernovae evidence for foundational change to cosmological models
Antonia Seifert, Zachary G. Lane, Marco Galoppo +2
We present a new, cosmologically model-independent, statistical analysis of the Pantheon+ type Ia supernovae spectroscopic dataset, improving a standard methodology adopted by Lane…
Cosmological foundations revisited with Pantheon+
Zachary G. Lane, Antonia Seifert, Ryan Ridden-Harper +1
We reanalyse the Pantheon+ supernova catalogue to compare a cosmology with non-FLRW evolution, the timescape cosmology, with the standard CDM cosmology. To this end, we analyse…