8 papers
White dwarf-neutron star binaries: a plausible pathway for long-duration gamma-ray bursts from compact object mergers?
A. A. Chrimes, N. Gaspari, A. J. Levan +7
Two long-duration gamma-ray bursts were recently discovered with kilonovae, the signature of r-process element production in a compact binary merger, rather than supernovae. This h…
A kinematically constrained kick distribution for isolated neutron stars
Paul Disberg, Nicola Gaspari, Andrew J. Levan
The magnitudes of the velocity kicks that neutron stars (NSs) obtain at their formation have long been a topic of discussion. In previous work, a novel method was proposed to deter…
Binary neutron star merger offsets from their host galaxies II. Short-duration gamma-ray bursts
N. Gaspari, A. J. Levan, A. A. Chrimes +1
The mergers of binary neutron stars (BNSs) and neutron star-black holes (NSBHs) binaries have long been linked to short-duration gamma-ray bursts (SGRBs). However, despite their st…
The brightest GRB ever detected: GRB 221009A as a highly luminous event at z = 0.151
D. B. Malesani, A. J. Levan, L. Izzo +39
Context: The extreme luminosity of gamma-ray bursts (GRBs) makes them powerful beacons for studies of the distant Universe. The most luminous bursts are typically detected at moder…
Binary neutron star merger offsets from their host galaxies. GW 170817 as a case study
N. Gaspari, H. F. Stevance, A. J. Levan +2
Aims. The locations of binary neutron star (BNS) mergers within their host galaxies encode the systemic kicks that these systems received in the supernova aftermath. We investigate…
Kinematic constraints on the ages and kick velocities of Galactic neutron star binaries
Paul Disberg, Nicola Gaspari, Andrew J. Levan
The systems creating binary neutron stars (BNSs) experience systemic kicks when one of the components goes supernova. The combined magnitude of these kicks is still a topic of deba…