Breaking the limits 2018

Super-Eddington accretion onto compact objects.

Castiadas (CA), Italy, October 1-5, 2018

About this conference

Recent years have seen an increasing interest of the astronomical community on the topic of super-Eddington accretion on compact objects, which can apply to a variety of systems, such as supermassive black holes, black hole binaries, ULXs, neutron stars. Moreover, the possibility that the Eddington limit may be violated can have important implications for the related topics of black hole growth, galaxy evolution and AGN feedback.
After two years from the first edition of Breaking the limits, we reconvene to discuss the advancement done in the last two years. This workshop will be an opportunity to compare recent observations with state-of-the-art theoretical modeling of super-Eddington flows, and to discuss the cosmological implications of this regime of accretion.

Scientific Organizing Committee

Matteo Bachetti (co-chair) - INAF Cagliari, Italy
Paola Castangia - INAF Cagliari, Italy
Tiziana di Salvo - University of Palermo, Italy
Chris Done - Durham University, UK
Andrew King - University of Leicester, UK
Rodrigo Nemmen - University of Sao Paulo, Brazil
Ken Ohsuga - National Astronomical Observatory of Japan, Japan
Alberto Pellizzoni - INAF Cagliari, Italy
Katja Pottschmidt - NASA Goddard Space Flight Center, USA
Chris Reynolds - University of Maryland, College Park, USA
Joe Silk - Institut de Astrophysique de Paris, France
Alexander Tchekovskoy - Northwestern University, USA
Francesco Tombesi (co-chair) - University of Rome "Tor Vergata", Italy; UMD, NASA/GSFC, USA
Marta Volonteri - Institut de Astrophysique de Paris, France

Local Organizing Committee

Matteo Bachetti (chair)
Marta Burgay
Elise Egron
Giulia Murtas
Maura Pilia
Paolo Soletta

Invited speakers per session

The program will be divided into themes, covering around half/one day each. A discussion on the topics of the session will take place at the end of each session, coordinated by an invited moderator.

Accretion and ejection physics
Chris Fragile (College of Charleston, USA)

Black hole growth and galaxy evolution
Marianne Vestergaard (University of Copenhagen)

Active Galactic Nuclei and quasars
Nadia Zakamska (Johns Hopkins University)

Galactic super-Eddington black holes and neutron stars
Diego Altamirano (University of Southampton)

Ultraluminous X-ray sources
Matt Middleton (University of Southampton)

Gamma-ray bursts, tidal disruption events, and gravitational waves
Eleonora Troja (GSFC/UMD)

New and future observatories: NICER, Athena, XARM, ...
Neil Cornish (Montana)


Sant'Elmo Beach Hotel is located in Costa Rei, in the southeast part of Sardinia, in one of the most beautiful stretches of shore of the island.



Organizing Secretariat

Kassiopea News sas
Via Stamira n 10
09134 Cagliari


To contact the LOC, please use
the following email address:
supereddington2018 at