Conveners
Multiwavelength and multi-messenger aspects
- Gustavo E. Romero (Instituto Argentino de Radioastronomía (IAR))
Multiwavelength and multi-messenger aspects
- Matteo Cerruti (Universitat de Barcelona / ICCUB)
Abstract: Abstract: Fast radio bursts (FRBs), bright millisecond duration radio transients, are quickly becoming a subject of intense interest in time-domain and high energy astrophysics. FRBs have the exciting potential to be used as cosmological probes of both matter and fundamental parameters, but such studies require large populations. Advances in FRB detection using current and...
The source FIRST J1419+3940 was recently discovered as a slow transient that has been fading for the last 30 years. The radio light-curve is consistent with an orphan long gamma-ray burst. However, our interest arises when comparing its host to the one where the Fast Radio Burst FRB 121102 is located: inside a low-metallicity star-forming region in a dwarf galaxy. Both sources show comparable...
We consider magnetorotational(MR) core-collapse supernova explosion mechanism.
Numerical simulations show that the shape of the MR explosion depends on the initial configuration of the magnetic field. The explosion can develop preferably near equatorial plane (quadrupole-like field) or as a mildly collimated jet (dipole-like field). We have estimated the dimensionless amplitude of the...
Astrophysical neutrinos, the “ghost particles of the Cosmos”, are unique probes of the physical conditions in their sources, as they can escape from them and reach Earth almost unimpeded due to their extremely weak interactions with matter and radiation. High-energy neutrinos, which are mainly produced by inelastic collisions of relativistic protons or heavier nuclei with radiation or matter,...
The tentative identification of the gamma-ray bright BL Lac object
TXS 0506+05 with very-high-energy neutrinos detected by IceCube
triggered a large number of works on the physics implications of
neutrino production in blazar jets. Most of these works agree that
GeV - TeV gamma-rays are unlikely to be produced by the same hadronic
processes generating the IceCube neutrinos in the same...
We used archival data to perform a detailed analysis
of the time evolution of the jet of TXS 0506+056.
In this talk we will discuss the specifics of the jet
kinematics and in particular its possible relation to
neutrino emission.
A paper describing the results has just been submitted.
Various observations are revealing the widespread occurrence of fast and powerful winds in active galactic nuclei (AGN) that are distinct from relativistic jets, likely launched from accretion disks. On sufficiently large scales, they are expected to interact with the gas of their host galaxies, leading to strong shocks that can accelerate nonthermal particles to high energies. Such winds have...
