News: Abstract submission for our Special Session is now open. We will accept ePosters for this session and we particularly encourage early-career researchers to propose abstracts.

The launch of jets plays a key role in wide-ranging astrophysical sources and processes, from star-formation and accretion onto black holes and neutron stars in our own Galaxy, to cataclysmic transients, compact object mergers, and active galactic nuclei at extragalactic distances. Jets not only regulate the systems that launch them; they are also crucial avenues of feedback as they transport power to scales far exceeding these systems. To understand the roles played by jets and to compare them across this range of scales and objects, it is crucial to have precision measurements of their properties: for instance, their velocity, geometry, structure, and power.

For different types of jet-launching systems, the combination of new methods and instruments has greatly increased the availability of such precision measurements in recent years: radio arrays such as MeerKAT now routinely resolve long-lived X-ray binary jet ejecta; polarimetric measurements across wavebands probe the jet's geometry and its relation to the accretion flow; multi-wavelength timing techniques can reveal their geometry and speed of jets as variability propagates through them; and the detection of impact structures around black holes constrains their time-integrated feedback power. The very recent detection of very-high-energy gamma-ray emission from accreting black holes again highlights the importance of accurately knowing their feedback properties and power. The availability of precision measurements in jets from stellar-mass compact objects also allows for better comparison with the population of resolved, extragalactic jets from Active Galactic Nuclei.

In this session, we aim to bring together experts on obtaining these precision measurements of jets in different astrophysical systems:

• Galactic jet-launching systems
• AGN and extra-galactic transients
• Theory and simulations of jet launching

Programme

This Special Session will consist of three 1.5-hour blocks. We will dedicate two blocks to new observational results and methods, and the third to simulating jet launching and impact.

The exact program will be posted at a later stage.

Invited speakers

Invited speakers will be announced once confirmed.

Scientific organisers

In alphabetical order:

• Pikky Atri ASTRON (NL)
• Cristina Baglio Brera Astronomical Observatory (IT)
• Francesco Carotenuto (co-chair) INAF/OAR (IT)
• Jakob van den Eijnden (chair) University of Amsterdam (NL)
• Alex Tetarenko University of Lethbridge (CA)
• Federico Vincentelli Coventry University (UK)

Contact