Over the past two decades, transient astronomy has made significant progress with the advent of all-sky synoptic surveys such as PanSTARRS, ZTF, ATLAS, and the upcoming launch of LSST. In parallel, progress has also been made in X-ray and Gamma-ray astronomy with Fermi, Swift, and NuStar missions, and the multimessenger astronomy enabled by gravitational wave detections by the LIGO/Virgo collaboration.

For the first time, the richness of the observational data allows us to gain insight into the details of stellar interactions that produce astrophysical transients. Jets are ubiquitous in astrophysics and potentially leave significant imprints in the properties of stellar transients. Core-collapse supernovae may experience mass transfer and launch non-collimated outflows by the time of the explosion. Common envelope events, which result in luminous red novae (LRNe) transients, take several years to onset. During this time, the mass transfer, accretion, and loss from the system may lead to a collimated or broad outflow, depending on whether the accretor is a main-sequence star or a compact object. Collimated jets launched inside gaseous environments, such as common envelopes or cores of collapsing stars, deposit energy in the environments, thus modifying the physics and emission properties of the transient events. For example, non-collimated jets may serve as circumstellar matter, affecting the transient light curves. Jets pointing at us may lead to distinct transients, as is the case for gamma-ray bursts. Finally, jets and outflows may result in shocks contributing to the light curves and spectroscopy of transients such as LRNe or classical novae and leave distinct imprints on the shapes of planetary and pre-planetary nebulae.

General appreciation of the connection between jets and stellar transients has emerged in research papers over the recent years. Through this Special Session, we wish to bring together, for the first time, the communities involved in observations of diverse types of transients (classical novae, X-ray binaries, LRNe, supernovae), the modelling of jets at various stellar evolutionary stages, and their imprints on the physics and observations of transients. This specific question may be of great interest to a broad range of scientific communities: X-ray binaries, novae, interaction transients, accretion, modelling of common envelope and stellar interactions, and observational time-domain astronomy. The best possible outcomes of this Special Session are the novel insights gained through the cross-disciplinary discussions among the participants and the initiation of new collaborations that will move this field forward.

Programme

1. Jets during the stellar evolution stages immediately preceding the transients
   • Low-mass systems:
     • Jets in low-mass X-ray binaries, ultracompact X-ray binaries, cataclysmic variables, AM CVn's
     • Accretion discs
     • Precursor emission
   • High-mass systems:
     • Jets in high-mass X-ray binaries, ultra-luminous X-ray sources
     • Accretion discs
     • Precursor emission
2. Jets during transients
   • Low-mass systems:
     • Luminous red novae, jet engines in common envelope evolution
   • High-mass systems:
     • Asymmetric supernovae, circumstellar matter interaction, broad-lined supernovae Ic, gamma-ray bursts, supernova transients
3. Jets in the immediate aftermath of the transients
   • Low-mass systems:
     • Pre-planetary nebulae, planetary nebulae, water maser fountains, luminous red nova remnants
   • High-mass systems:
     • Supernova remnants

Invited speakers

Confirmed Invited Speakers:

• Simone Scaringi
• Friedrich Roepke
• Eric Blackman
• Igor Andreoni

Scientific organisers

Alphabetically:

• Nadejda Blagorodnova Mujortova
• Alexey Bobrick (Chair)
• Orsola De Marco
• Ana Lourdes Juarez Garcia (Chair)

Contact

• ★ bobrick @ campus.technion.ac.il
• ★ analourdes.jurezgarca @ hdr.mq.edu.au