7 papers
Bessel-Hagen currents for linearised Weyl-squared gravity
Michael Hobson, Will Barker, Anthony Lasenby
For the Fierz-Pauli action the Bessel-Hagen construction does not produce a preferred local gauge-invariant energy-momentum tensor; it identifies only a gauge-invariant equivalence…
Numerical polology: towards next-generation model-building for cosmology
Will Barker, Will Handley, Michael Hobson +4
The dark sector need not be restricted to simple field content. Indeed, simple bosonic configurations, such as scalar-tensor or dark photon models, contrast with the much richer pi…
Bessel-Hagen currents for the Fierz-Pauli action
Michael Hobson, Will Barker, Anthony Lasenby
For electromagnetism in Minkowski spacetime, the Bessel-Hagen method gives a particularly direct Noetherian derivation of the standard gauge-invariant energy-momentum tensor. The k…
Tilting the scales: weighing prior dependency and global tensions of CMB lensing
A. N. Ormondroyd, W. J. Handley, M. P. Hobson +1
We provide a nested sampling analysis of the combination of CMB lensing experiments with other cosmological measurements. Nested samples can be used to compute global consistency s…
Dynamic or Systematic? Bayesian model selection between dark energy and supernova biases
A. N. Ormondroyd, W. J. Handley, M. P. Hobson +2
The Dark Energy Survey 5-year (DES-5Y) supernovae, combined with Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillations, appear to favour Chevallier-Polarski-Lind…
Comparison of dynamical dark energy with ÎCDM in light of DESI DR2
A. N. Ormondroyd, W. J. Handley, M. P. Hobson +1
We present an updated reconstruction of the dark energy equation of state, , using the newly released DESI DR2 Baryon Acoustic Oscillation (BAO) data in combination with Pant…