International Solvay Institutes

Back to Workshops

"The Dark Side of Black Holes"

Brussels, 3 - 5 April 2019 (ULB - Campus Plaine - Solvay Room)


It has been long hypothesized that there might be a close connection between black holes (BH) and the dark matter of the Universe (DM). That connection potentially goes both ways. For one, BH could have formed already in the Early Universe by gravitational collapse of density fluctuations. Such primordial black holes (PBH) could have survived till present epoch and serve an attractive DM candidate that does not require a new stable particle – a particle long sought for by direct and indirect DM experiments and not (yet) detected. Conversely, many particle DM models (WIMPs or axion-like particles) exhibit new mechanisms of BH formation, allow for compact star-like objects resembling BH or show other specific effects that make BH observations good probes for these models. The interest in such possibilities was recently spinned up by the detection of gravitational waves from merging BHs and neutron stars, observations that open new ways to study BH and similar compact objects. In this Solvay Workshop, the most recent advances in this hot and timely topic will be discussed, focusing on the interplay between black holes and other compact objects and the dark matter problem.





Scientific & Organizing Committee

Sébastien Clesse (UNamur, Belgium)

Ben Craps (VUB, Brussels, Belgium)

Thomas Hertog (KU Leuven, Belgium)

Christophe Ringeval (UCL, Louvain, Belgium)

Laura Lopez Honorez (ULB, Brussels, Belgium)

Alexander Sevrin (VUB, Brussels, Belgium)

Petr Tinyakov (ULB, Brussels, Belgium)

Michel Tytgat (ULB, Brussels, Belgium)



Practical information for attendees

Fee and registration

Attendance is free of charge but registration is required (limited space).

Coffee breaks will be provided to all participants during the workshop.

Lunches are not included.
March 27, 2019 is the deadline for registration.

Registration is now closed.


Name badges and WIFI codes will be distributed on site on Wednesday 3 April from 9:40 a.m.


The workshop will be held at ULB (Université Libre de Bruxelles) - Campus Plaine - Bld de la Plaine - 1050 Brussels
(Building N.O. - 5th Floor - Solvay Room). Click HERE for the map of the Campus.


A banquet will be held on Thursday 4 April at 7:30 p.m.
For those who wish to attend, there will be a 50 Euro banquet fee to be paid cash on the first day of the workshop.

Please send an email to Isabelle Van Geet ( if you wish to attend.

Getting here

Metro line 5 (direction "Hermann Debroux") - Station "Delta". Delta is the metro station on the campus.
Click HERE for the map of the metro.

For more information about public transport in Brussels go to the STIB's website.

If you come by car, please click HERE for directions.

Travel and accommodation

Attendees will have to arrange and pay for their own travel, accommodation, and subsistence costs.

Please see below links that might help you find accommodation in Brussels.


Brussels City Center:

Hôtel Atlas - Sleep Well - Bed & Brussels - - Hotel Saint-Nicolas

Hotel Queen Anne - Hotel Bloom - Max Hotel - Metropole Hotel - Plaza Hotel


Hotels close to the venue:

U-Residence: 1.6 km (20 minutes walk - tram number 7: 12 minutes)

Hotel Brussels: 1.5 km (18 minutes walk - tram number 94: 14 minutes)

Hotel Barsey by Warwick: 1.2 km (15 minutes walk - tram number 94: 11 minutes)

Hotel Ibis Styles Hotel Brussels Louise: 1.9 km ( 23 minutes walk - tram number 94: 16 minutes)

Hotel Capital: 1.5 km (19 minutes walk - tram number 94: 16 minutes)



***For any enquiries, please contact Isabelle Van Geet (