9th Microquasar Workshop:

Celebrating over 50 years of discovery

20-24 September 2021, Cagliari, Italy

"The 9th Microquasar Workshop: Celebrating over 50 years of discovery" will be held in Cagliari (Sardinia), Italy, on 20-24 September 2021. Given the situation related to the COVID-19 pandemic, the conference has been postponed from September 2020 to 2021.

It is the ninth in a series of conferences mainly devoted to microquasars but also covering relativistic jet sources in a broader context. It will also be an occasion to celebrate the 50 years since the discovery of variable radio emission from X-ray binaries.

Given all the uncertainties in the next few months, the conference will be virtual (with e.g. Zoom for the talks and gather-town for the "social" events). We will do our best to make the conference lively, with many interactions between the participants. We also consider the possibility to have a hybrid version of the conference (virtual + on-site) if the situation improves significantly this summer (we will take the final decision at the beginning of July). In case people will be able to travel, the conference will probably take place at the Observatory of Cagliari in full respects of the protective measures and social distancing. In order to anticipate the number of participants (the number of places, both on-site and remote, will be limited) and to ease the organization of the workshop, we kindly ask you to fill in the pre-register form.

The workshop aims to present and discuss the latest results related to X-ray binaries, in particular accretion/ejection physics (multi-wavelength observations and theory/simulations), the properties, mechanisms and interplays of the accretion disk, disk winds, jets, accretion/ejection at all scales, and comparison with the various accretions (BH, NS, CV). The formation, evolution and merging of compact objects in binaries will also be addressed. In the context of recent missions devoted to transient sources, new facilities will be discussed (such as NICER, HXMT, MeerKAT, ASKAP, etc), in addition to new tools and diagnostics based on X-ray timing.

The scientific program will be organized in several sessions including invited reviews, contributed talks, posters and ample time for discussion, such as how to optimize multi-lambda campaigns and collaborations, diversity in science (status of young researchers, women, under-represented minorities and people from disadvantaged countries). A visit to the Sardinia Radio Telescope is planned. Along with the scientific program, cultural and social events will be organized (if possible).

Main topics

  • Multi-wavelength observations of Binaries (Galactic and Extragalactic)

  • Formation, evolution and merging of compact objects in Binaries

  • Timing analysis

  • Accretion-ejection connection at all scales

  • Theory/simulations

Important dates

  • 5 March 2021

  • 1 April 2021

  • 15 June 2021

    • Abstract submission closes

  • Mid-July 2021

    • Communication of the selected contributions

  • 31 July 2021

    • Deadline for the registration fee


  • P. G. Casella (INAF, Rome, Italy)

  • S. Corbel (AIM, Paris, France)

  • B. De Marco (Nicolaus Copernicus Astronomical Center, Varsaw, Poland)

  • E. Egron (co-Chair, INAF, Cagliari, Italy)

  • R. Fender (Oxford University, UK)

  • M. Giroletti (INAF, Bologna, Italy)

  • V. Grinberg (co-Chair, University of Tübingen, Germany)

  • S. Markoff (Amsterdam University, the Netherlands)

  • J. Miller Jones (Curtin University, Australia)

  • M. Nowak (Washington University, St. Louis, USA)

  • A. Pellizzoni (INAF, Cagliari, Italy)

  • P. O. Petrucci (co-Chair, IPAG, Grenoble, France)

  • J. Rodriguez (co-Chair, AIM, Paris, France)

  • D. Russell (New York University Abu Dhabi, United Arab Emirates)

  • G. Sivakoff (Alberta University, Edmonton, Canada)

  • J. Tomsick (University of California, Berkeley, USA)

  • Y. Ueda (Kyoto University, Japon)

  • A. Veledina (University of Turku, Finland)

  • J. Wilms (University of Erlangen-Nuremberg, Germany)

  • A. Zdziarski (Nicolaus Copernicus Astronomical Center, Varsaw, Poland)


  • M. Bachetti

  • M. Burgay

  • S. Casu

  • T. Coiana

  • E. Egron

  • N. Iacolina

  • A. Pellizzoni

  • P. O. Petrucci

  • D. Perrodin

  • M. Pilia

  • A. Ridolfi

  • J. Rodriguez

  • P. Soletta

  • F. Vincentelli