45 citations · 117 across the 15 of their papers we have counts for
16 papers
The Hidden Evolution of Gamma-Ray Burst Jets Revealed by Gravitational Waves
Gerardo Urrutia, Fabio De Colle, Agnieszka Janiuk +2
Gamma-ray burst (GRB) jets can propagate through massive stars, where the high opacity of the stellar envelope traps electromagnetic radiation and limits observations of the jet at…
Constraining inhomogeneities and asymmetries in SNe, FBOTs, and other high-energy transients from unresolved radio observations
Fabio De Colle, Rosa L. Becerra, Lizeth A. Meza +7
Synchrotron emission in high-energy transients is produced by relativistic electrons accelerated by shocks. As high-energy transients are often unresolved even on angular scales pr…
The propagation of long GRB jets through and beyond its progenitor star
Gerardo Urrutia, Agnieszka Janiuk
Long gamma-ray bursts (lGRB) are produced by relativistic jets arising from the collapse of massive stars. Such progenitor environments present complex physical conditions that are…
Relativistic MHD simulations of merging and collapsing stars and effects on GRB transient
Agnieszka Janiuk, Gerardo Urrutia, Joseph Saji +1
Compact binary mergers and the collapse of massive stars can produce intense transients observable across high-energy wavelengths. Events such as gamma-ray bursts and kilonova emis…
Chemical Evolution and Kilonova Implications of Post-Merger Accretion Disk Winds
Agnieszka Janiuk, Joseph Saji, Gerardo Urrutia
Several gamma ray bursts have recently been associated with a kilonova emission. We study the mechanisms which could account for this effect, by means of radioactive decay of eleme…
Numerical simulations of jet launching and breakout from collapsars
Gerardo Urrutia, Agnieszka Janiuk, Hector Olivares
Long Gamma-Ray Bursts (LGRBs) are often associated with the collapse of stripped-envelope massive stars. Powerful relativistic jets drill through the stellar envelope before the ga…
Theoretical Modelling of Gamma-Ray Burst 090510
Joseph Saji, Agnieszka Janiuk, Maria Giovanna Dainotti +2
Gamma-ray bursts detected at high energies provide valuable insights into the emission mechanisms behind these still puzzling enigmatic events. In this study, we focus on GRB 09051…
What we can learn about compact binary mergers from their kilonova signals?
Agnieszka Janiuk, Joseph Saji, Gerardo Urrutia
Compact binary mergers are sources of gravitational waves, and can be accompanied by electromagnetic signals. We discuss the possible features in the kilonova emissions which may h…
Following the jet interaction with a post-merger disk outflow
Gerardo Urrutia, Agnieszka Janiuk
Short GRBs are produced by relativistic jets arising from binary NS-NS or NS-BH mergers. Since the detection of the first unambiguous off-axis GRB 170817A, we learned that energy d…
Numerical GR MHD simulations of the post-merger system with a composition-dependent equation of state
Agnieszka Janiuk, Gerardo Urrutia
By means of HARM\_COOL\_EOS, which is our code for conservative relativistic magnetohydrodynamics, we developed a new scheme for the simulation of a system formed after compact bin…
The impact of disk outflows on the structure of short GRB jets at large scales
Gerardo Urrutia, Agnieszka Janiuk, Fatemeh Hossein Nouri
Short Gamma-Ray Bursts (GRBs) are known to be associated with binary neutron star (NSNS) or black hole-neutron star (BHNS) mergers. The detection of gravitational wave and its asso…
Numerical simulations of polarisation in gamma-ray burst afterglows
Rogelio Medina Covarrubias, Fabio De Colle, Gerardo Urrutia +1
We compute the linear polarisation during the afterglow phase of gamma-ray bursts, for both on-axis and off-axis observers. We use numerical simulations of the deceleration of a re…
Gravitational Waves from the Propagation of Long Gamma-Ray Burst jets
Gerardo Urrutia, Fabio De Colle, Claudia Moreno +1
Gamma-ray bursts (GRBs) are produced during the propagation of ultra-relativistic jets. It is challenging to study the jet close to the central source, due to the high opacity of t…
Three-dimensional numerical simulations of structured GRB jets
Gerardo Urrutia, Fabio De Colle, Diego López-Cámara
After the detection of GRB 170817A, the first unambiguous off-axis gamma-ray burst (GRB), several studies tried to understand the structure of GRB jets. The initial jet structure (…
What determines the structure of short gamma-ray burst jets?
Gerardo Urrutia, Fabio De Colle, Ariadna Murguia-Berthier +1
The discovery of GRB 170817A, the first unambiguous off-axis short gamma-ray burst arising from a neutron star merger, has challenged our understanding of the angular structure of…
Numerical Simulations of an Initially Top-Hat Jet and the Afterglow of GW170817/GRB170817A
Ramandeep Gill, Jonathan Granot, Fabio De Colle +1
The afterglow of GRB170817A/GW170817 was very unusual, slowly rising as , peaking at days, and sharply d…