Conveners
Transients & GW follow-up
- Chair: Giulia MIgliori
Transients & GW follow-up
- Chair: Giulia Migliori
Transients & GW follow-up
- Chair: Roberto Ragazzoni
Fast Radio Bursts are millisecond-long, bright (typically 1-100 Jy) radio flashes of (mostly) cosmological origin (up to z ~ 2.1!). At the time of writing, close to a thousand events have been published, with a large range of properties in terms of fluences, spectra, time smearing and characteristics of the host galaxies - when localized. Their origin remains indeed largely debated, although...
A detailed investigation of the environments in which bursts occur is one of the most promising approaches to shed light on these mysterious phenomena. Observations of a limited number of events suggest multiple progenitor channels, resulting in distinct locations, local environments, and host galaxy properties. The recent discovery of persistent radio sources associated with FRB 20201124A and...
Fast Radio Bursts (FRBs) are bright (Jy-level) radio flashes from extragalactic distances, with still uncertain origins. While magnetars are often proposed as progenitors, this scenario struggles to explain some key observables, such as the high observed rate of some active repeaters. The Square Kilometre Array (SKA), with its high sensitivity, wide field of view, and precise resolution, will...
Long gamma-ray bursts (GRBs) are among the most powerful explosions in the Universe, marking the catastrophic death of a massive star and the birth of a spinning, stellar mass black hole. This central engine launches two jets of ionised matter which eventually interact with the circum-burst medium through external shocks, producing the so called afterglow phase. Radio observations,...
The inflow of matter onto astronomical objects is linked to the generation of outflows across the Universe, ranging from proto-planetary disks to merging neutron stars and gamma-ray bursts, to stellar-mass and supermassive black holes.
Low-mass X-ray binaries, hosting either stellar-mass black holes or neutron stars, are the most common type of transient in the Galaxy and exhibit bright jets...
Black hole X-ray binaries (BH XRBs) can launch powerful outflows in the form of radio-emitting discrete jet ejecta, which are observed to be produced during outburst phases, at the transition between different accretion states.
Once spatially resolved, these components are observed to propagate up to parsec scales far from the BH, often displaying apparent superluminal motion. However,...
X-ray binaries (XRBs) hosting a stellar mass black hole (BH) or a neutron star exhibit a powerful emission triggered by accretion of matter onto the compact object from the companion star; this process may lead to the formation of fast, collimated outflows, called jets. Most BH-XRBs are transients, producing steady, mildly relativistic compact jets during quiescence and the low-luminosity...
The Transient High-Energy Sky and Early Universe Surveyor (THESEUS) is a space mission concept under study by ESA as candidate M7 mission, aiming at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics. THESEUS will address main open issues in cosmology such as, e.g., star formation rate and...
Type Ic broad-line supernovae are energetic events requiring an additional energy source to explain their high kinetic energy, likely driven by a relativistic jet from a rapidly rotating compact remnant. The jet generates a cocoon that influences supernova properties, with signatures predominantly detectable at radio frequencies soon after the explosion. In this talk, we will share findings...
