Description
Talks on theoretical models and their applications in transient astronomy.
Over the last 20 years the Binary Population and Spectral Synthesis code has been used to constrain transients through multiple comparisons between theory and observations. For example, resolved supernova progenitors, long-GRB afterglow properties, resolved and unresolved stellar population at supernova and kilonova sites, synthetic supernova lightcurves, and gravitational wave transient rate...
We present a study using the Binary Population and Spectral Synthesis code (BPASS) that predicts the Galactic population of binaries that contain a black hole or neutron star. By incorporating the stellar evolution models from the BPASS suite with a Milky Way analogue galaxy from the Feedback in Realistic Environment (FIRE) simulation suite, we can generate a theoretical population of...
Fast radio bursts (FRBs) are transient radio events with millisecond-scale durations and debated origins.
Collisions between planetesimals and neutron stars are one proposed mechanism to produce FRB-like signals, with the planetesimal's strength, size and density determining the time duration and energy of the resulting event. One under-explored source of these planetesimals is the...
The timescape cosmology returns to first principles, with quasilocal gravitational energy replacing dark energy, to explain apparent cosmic acceleration. As inhomogeneities grow, they back react on average cosmic expansion, which differs from conventional FLRW models. Crucially, dynamical spatial curvature arises as time-varying gradients of the kinetic energy of expansion, and depends...
