RER-S8 Cosmology Meeting
Tuesday, 26 May 2026 -
09:00
Monday, 25 May 2026
Tuesday, 26 May 2026
09:45
Welcome & Coffee
Welcome & Coffee
09:45 - 10:00
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
10:00
The growth of (primordial) black holes inside main-sequence stars
-
Nicolas Esser
The growth of (primordial) black holes inside main-sequence stars
Nicolas Esser
10:00 - 10:30
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
We study the growth of black holes trapped inside main-sequence stars. Starting from the Bondi accretion framework, we examine the microphysics of the plasma, including nuclear energy generation and energy transport within the accretion flow. We find that the Bondi solution provides an accurate description for black holes with masses between 10^21 and 10^28 g. We also investigate the fate of stars hosting such black holes, including the role of stellar rotation. Importantly, we consider scenarios in which the black holes orbit within the star rather than remaining fixed at its center. We conclude that black holes with masses > 10^21 g will either accrete their host stars on timescales much shorter than the age of the Universe or produce sufficient luminosity to leave observable signatures. The case of lighter black holes remains unclear. We discuss these results in the context of constraints on asteroid-mass primordial black holes from star destruction. This talk is based on an upcoming paper that completes previous studies on the capture of PBHs by stars and on how asteroid-mass PBHs can be constrained through such processes (2207.07412, 2311.12658, and 2503.03352).
10:30
Contribution 3
Contribution 3
10:30 - 11:00
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
11:00
Coffee Break
Coffee Break
11:00 - 11:15
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
11:15
Signatures of loop quantum gravity in primordial black hole cosmologies
-
Antoine Dierckx
Signatures of loop quantum gravity in primordial black hole cosmologies
Antoine Dierckx
11:15 - 11:45
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
11:45
Contribution 5
Contribution 5
11:45 - 12:15
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
12:15
Lunch
Lunch
12:15 - 14:15
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
14:15
Contribution 6
Contribution 6
14:15 - 14:45
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
14:45
Contribution 7
Contribution 7
14:45 - 15:15
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
15:15
Contribution 8
Contribution 8
15:15 - 15:45
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
15:45
Coffee Break
Coffee Break
15:45 - 16:00
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
16:00
Contribution 9
Contribution 9
16:00 - 16:30
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
16:30
The case of stellar-mass primordial black holes as dark matter
-
Sébastien Clesse
(
Université Libre de Bruxelles (ULB)
)
The case of stellar-mass primordial black holes as dark matter
Sébastien Clesse
(
Université Libre de Bruxelles (ULB)
)
16:30 - 17:00
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)
17:00
Drink downtown
Drink downtown
17:00 - 18:15
Room: Cyclotron Building, Room E349 (Tower E, 3rd floor)