Scientific rationale

The recent discoveries of gravitational waves and very high-energy neutrinos have opened new windows in the exploration to the Universe. Furthermore, the new generation of sensitive, wide-field instrumentation across the entire electromagnetic and astroparticle spectrum (SKA, CTA, KM3NeT, ELT, Athena) are set to radically change the way we perceive the Universe.

The conference will explore the current themes of multi-messenger science. In particular, for each topic, we want to address a number of open questions in those fields.


"Electromagnetic transients in multi-messenger signals"

  • What have we learned from the detection of a high-energy neutrino from the flaring blazar TXS 0506+056? How does this finding fit together with the detection of an excess of neutrinos at TeV energies from the same blazar? How can we improve the search for neutrinos from blazars in the future?
  • Are blazars the main contributors to the measured diffuse neutrino flux? What are other possible source candidates? How can we probe those? Which multi-messenger observations are needed?
  • Are GW170817 observations and the standard model for short GRB conciliable?
  • What is the expected rate of joint observations after GW170817?
  • What are the consequences of GW170817 observations on kilonova modeling?
  • What are the prospects on heavy nuclei synthesis? What (kilonova) observation(s) would be key to advance in this area?
  • What is the status and future of joint GW and EM constraints on the EOS of dense matter?
  • What constraints on the post-merger phase? What is the nature of Black Hole - Neutron Star merger remnants?
  • What do multi-messenger observations say about the physics of the central engine and jet production?

"Gravitational wave follow up of other sources"

  • Is it worth pursuing EM follow-up of BBH? What counterpart models? With what strategy?
  • What scientific scenarios can multi-messenger observations of Black Hole - Neutron Star mergers open?
  • What can we learn about stellar core-collapse from joint GW-EM-neutrinos observations?

"Implications of multi-messenger observation"

  • Prospects about standard sirens and cosmology
  • Constraints on fundamental physics from multi-messenger observations? (speed of gravity, etc)

"Outlook/anticipation - Multi-messenger astronomy in 5/10 year timescale.

  • What are the prospects of detecting high-energy neutrinos in the future with new detectors such as Km3NET, IceCube Gen2 and Baikal GVD?
  • Impact of future synoptic surveys (LSST, SKA) and larger GW network with fully operational KAGRA and LIGO India"
  • Will those future infrastructures transform the field of multi-messenger astrophysics and how?

"Multi-messenger technology and interoperability / Alert mechanism / Policies"

  • First feedback on LIGO/Virgo open alerts - Experience from other related fields (e.g., GRBs)
  • Does the communication, storage and processing infrastructures for alert and follow-up observations need further development?
  • Is the current infrastructure going to scale in the next 10 years?
  • What tools have been developed for multi-messenger astrophysics?
  • Where will these tools and their interoperability lead us to?
  • What tools are still needed?
  • Where else does the work of ASTERICS and the interoperability of multi-messenger instruments lead us?

"The principles of Open Science"

  • Are open science and large scientific collaborations compatible?
  • What is the impact of current open data on education at universities and general public?




ASTERICS is a project supported by the European Commission Framework Programme Horizon 2020 Research and Innovation action under grant agreement n.653477