230 citations · 489 across the 17 of their papers we have counts for
17 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…
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…
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. 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…
Deceleration of kicked objects due to the Galactic potential
Paul Disberg, Nicola Gaspari, Andrew J. Levan
Various stellar objects experience a velocity kick at some point in their evolution. These include neutron stars and black holes at their birth or binary systems when one of the tw…
The fast X-ray transient EP240315a: a z ~ 5 gamma-ray burst in a Lyman continuum leaking galaxy
Andrew J. Levan, Peter G. Jonker, Andrea Saccardi +73
The nature of the minute-to-hour long Fast X-ray Transients (FXTs) localised by telescopes such as Chandra, Swift, and XMM-Newton remains mysterious, with numerous models suggested…
The Galactic neutron star population II -- Systemic velocities and merger locations of binary neutron stars
Nicola Gaspari, Andrew J. Levan, Ashley A. Chrimes +1
The merger locations of binary neutron stars (BNSs) encode their galactic kinematics and provide insights into their connection to short gamma-ray bursts (SGRBs). In this work, we…
JWST detection of heavy neutron capture elements in a compact object merger
A. Levan, B. P. Gompertz, O. S. Salafia +80
The mergers of binary compact objects such as neutron stars and black holes are of central interest to several areas of astrophysics, including as the progenitors of gamma-ray burs…
AT2023fhn (the Finch): a Luminous Fast Blue Optical Transient at a large offset from its host galaxy
A. A. Chrimes, P. G. Jonker, A. J. Levan +8
Luminous Fast Blue Optical Transients (LFBOTs) - the prototypical example being AT2018cow - are a rare class of events whose origins are poorly understood. They are characterised b…
Searching for ejected supernova companions in the era of precise proper motion and radial velocity measurements
A. A. Chrimes, A. J. Levan, J. J. Eldridge +7
The majority of massive stars are born in binaries, and most unbind upon the first supernova. With precise proper motion surveys such as Gaia, it is possible to trace back the moti…
A long-duration gamma-ray burst of dynamical origin from the nucleus of an ancient galaxy
Andrew J. Levan, Daniele B. Malesani, Benjamin P. Gompertz +29
The majority of long duration ( s) gamma-ray bursts (GRBs) are believed to arise from the collapse of massive stars \cite{Hjorth+03}, with a small proportion created from the m…
The first JWST spectrum of a GRB afterglow: No bright supernova in observations of the brightest GRB of all time, GRB 221009A
A. J. Levan, G. P. Lamb, B. Schneider +57
We present JWST and Hubble Space Telescope (HST) observations of the afterglow of GRB 221009A, the brightest gamma-ray burst (GRB) ever observed. This includes the first mid-IR spe…
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…
Compact object mergers: exploring uncertainties from stellar and binary evolution with SEVN
Giuliano Iorio, Michela Mapelli, Guglielmo Costa +9
Population-synthesis codes are an unique tool to explore the parameter space of massive binary star evolution and binary compact object (BCO) formation. Most population-synthesis c…
The impact of binaries on the evolution of star clusters from turbulent molecular clouds
Stefano Torniamenti, Alessandro Ballone, Michela Mapelli +5
Most of massive stars form in binary or higher-order systems in clumpy, sub-structured clusters. In the very first phases of their life, these stars are expected to interact with t…
From hydrodynamics to N-body simulations of star clusters: mergers and rotation
Alessandro Ballone, Stefano Torniamenti, Michela Mapelli +5
We present a new method to obtain more realistic initial conditions for N-body simulations of young star clusters. We start from the outputs of hydrodynamical simulations of molecu…