A5102709969- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Magnetic confinement fusion research
- Astro and Planetary Science
- Astrophysics and Cosmic Phenomena
- Ionosphere and magnetosphere dynamics
- High-pressure geophysics and materials
- Superconducting Materials and Applications
- Space Exploration and Technology
- Mechanics and Biomechanics Studies
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Geophysics and Sensor Technology
- Stellar, planetary, and galactic studies
- Solar and Space Plasma Dynamics
Polish Academy of Sciences
2022-2025
Center for Theoretical Physics
2022-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2025
Inter-University Centre for Astronomy and Astrophysics
2018-2023
Washington State University
2014-2018
ABSTRACT Short gamma-ray bursts (GRBs) are known to be associated with binary neutron star (NSNS) or black hole–neutron (BHNS) mergers. The detection of gravitational waves and its electromagnetic counterpart GW/GRB 170817A has shown that interactions between relativistic jets mildly ejecta influence observed radiation. Previous studies simulated a uniform jet propagating through homologously expanding wind; however, disc outflows launched together during accretion, making the interaction...
Dynamical instabilities in protoneutron stars may produce gravitational waves whose observation could shed light on the physics of core-collapse supernovae. When born with sufficient differential rotation, these are susceptible to a shear instability (the ``low-$T/|W|$ instability''), but such rotation can also amplify magnetic fields strengths where they have considerable impact dynamics stellar matter. Using new magnetohydrodynamics module for Spectral Einstein Code, we simulated...
Black hole--torus systems from compact binary mergers are possible engines for gamma-ray bursts (GRBs). During the early evolution of postmerger remnant, state torus is determined by a combination neutrino cooling and magnetically driven heating processes, so realistic models must include both effects. In this paper, we study magnetized black hole--neutron star system using Spectral Einstein Code (SpEC) an initial provided previous numerical relativity simulations. We use finite-temperature...
The merger of supermassive black holes produces millihertz gravitational waves (GWs), which are potentially detectable by the future Laser Interferometer Space Antenna (LISA). Such binary systems usually embedded in an accretion disk environment at center active galactic nucleus (AGN). Recent studies suggest plasma imposes measurable imprints on GW signal if mass ratio is around q ∼ 10 −4 − −3 . effect gaseous strongly dependent disk’s parameters; therefore, it believed that low-frequency...
Abstract Neutrino-cooled accretion flow around a spinning black hole, produced by compact binary merger, is promising scenario for jet formation and launching magnetically driven outflows. Based on GW170817 gravitational wave detection LIGO Virgo observatories, followed electromagnetic counterparts, this model can explain the central engine of short-duration gamma-ray bursts kilonova radiations. Using open-source general relativistic magnetohydrodynamic HARM-COOL code, we evolved several 2D...
We investigate the dependence of GRB jet structure and its evolution on properties accreting torus in central engine. Our models numerically evolve accretion disk around a Kerr black hole using 3D general relativistic magnetohydrodynamic simulations. use two different analytical hydrodynamical disk, based Fishbone-Moncrief Chakrabarti solutions, as our initial states for collapsar remnant after binary neutron star merger, respectively. impose poloidal magnetic fields geometries upon stable...
Short Gamma-Ray Bursts (GRBs) are often associated with NSNS or BHNS mergers. The discovery of GW/GRB 170817A has enhanced our understanding, revealing that the interaction between relativistic jets and post-merger outflows influences observed radiation. However, nature compact binary merger event suggests system can be more complex than uniform jet interacting a homologously expanding wind. We consider here an improved scenario by performing set two-dimensional, large scale numerical...
The merger of supermassive black holes (SMBHs) produces mHz gravitational waves (GW), which are potentially detectable by future Laser Interferometer Space Antenna (LISA). Such binary systems usually embedded in an accretion disk environment at the centre active galactic nucleus (AGN). Recent studies suggest plasma imposes measurable imprints on GW signal if mass ratio is around q $ \sim10^{-4}-10^{-3}$. effect gaseous strongly dependent disk's parameters, therefore it believed that...
We compute the internal modes of a nonspinning neutron star and its tidal metric perturbation in general relativity, determine effect relativistic corrections to on mode coupling. Claims have been made that new hydrodynamic instability can occur binary system triggered by nonlinear coupling companion's field pairs p-modes g-modes it as inspirals toward merger. This ``PG'' may be significant since influence binary's inspiral phase extracting orbital energy, thereby potentially causing large...
Neutrino-cooled accretion flow around a black hole, produced by compact binary merger, is promising scenario for jet formation and magnetic-driven winds to explain short duration gamma ray bursts (GRBs) central engine kilonovae based on GW170817 gravitational wave observation. Magnetorotational instability (MRI) turbulence Blandford-Znajek (BZ) mechanism are expected play key roles in the thermal equilibrium of disk (balancing neutrino cooling) driving creating jets. Using open-source GRMHD...
We investigate the dependence of GRB jet structure and its evolution on properties accreting torus in central engine. Our models numerically evolve accretion disk around a Kerr black hole using 3D general relativistic magnetohydrodynamic simulations. use two different analytical hydrodynamical disk, based Fishbone-Moncrief Chakrabarti solutions, as our initial states for collapsar remnant after binary neutron star merger, respectively. impose poloidal magnetic fields geometries upon stable...
Neutrino-cooled accretion flow around a spinning black hole, produced by compact binary merger is promising scenario for jet formation and launching magnetically-driven outflows. Based on GW170817 gravitational wave detection LIGO Virgo observatories followed electromagnetic counterparts, this model can explain the central engine of short duration gamma ray bursts (GRB) kilonova radiations. Using open-source GRMHD HARM-COOL code, we evolved several 2D magnetized disk-black hole models with...
We compute the internal modes of a nonspinning neutron star and its tidal metric perturbation in general relativity, determine effect relativistic corrections to on mode coupling. Claims have been made that new hydrodynamic instability can occur binary system triggered by nonlinear coupling companion's field pairs p-modes g-modes it as inspirals toward merger. This "PG" may be significant since influence binary's inspiral phase extracting orbital energy, thereby potentially causing large...