Publications (9)
Diffuse Galactic antimatter from faint thermonuclear supernovae in old stellar populations
Roland M. Crocker, Ashley J. Ruiter, Ivo R. Seitenzahl +10
Our Galaxy hosts the annihilation of a few low-energy positrons every second. Radioactive isotopes capable of supplying such positrons are synthesised in stars, st…
Trans-Fe elements from Type Ia Supernovae. I. Heavy element nucleosynthesis during the formation of near-Chandrasekhar white dwarfs
Umberto Battino, James Keegans, Megan Allen +9
Type Ia supernovae (SNIa) are thermonuclear explosions of white dwarfs in binary systems. They are central to galactic chemical evolution and serve as standardizable candles in cos…
Evidence for relativistic features in the X-ray spectrum of Mrk 335
Anna Lia Longinotti, Stuart Sim, Kirpal Nandra +1
We present an analysis of hard X-ray features in the spectrum of the bright Sy 1 galaxy Mrk 335 observed by the XMM-Newton satellite. Our analysis confi rms the presence of a broad…
Spherical symmetry in the kilonova AT2017gfo/GW170817
Albert Sneppen, Darach Watson, Andreas Bauswein +5
The mergers of neutron stars expel a heavy-element enriched fireball which can be observed as a kilonova. The kilonova's geometry is a key diagnostic of the merger and is dictated…
Prospects of direct detection of V gamma-rays from thermonuclear supernovae
Fiona H. Panther, Ivo R. Seitenzahl, Ashley J. Ruiter +3
Detection of gamma-rays emitted by radioactive isotopes synthesized in stellar explosions can give important insights into the processes that power transients such as supernovae, a…
The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
Kirpal Nandra, Didier Barret, Xavier Barcons +237
This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of tw…
New Radiative and Collisional Atomic Data for Sr {\sc ii} and Y {\sc ii} with application to Kilonova modelling
Leo Mulholland, Niall McElroy, Fiona McNeill +3
The spectra of singly ionised Strontium and Yttrium (Sr {\sc ii} and Y {\sc ii}) have been proposed as identifications of certain spectral features in the AT2017gfo spectrum. With…
Catching Element Formation In The Act
Chris L. Fryer, Frank Timmes, Aimee L. Hungerford +216
Gamma-ray astronomy explores the most energetic photons in nature to address some of the most pressing puzzles in contemporary astrophysics. It encompasses a wide range of objects…
Synthetic Light Curves and Spectra from a Self-Consistent 2D Simulation of an Ultra-strippped Supernova
Thomas Maunder, Bernhard Müller, Fionntan Callan +2
Spectroscopy is an important tool for providing insights into the structure of core-collapse supernova explosions. We use the Monte Carlo radiative transfer code ARTIS to compute s…