We analyze the dynamics of a collisionless kinetic gas propagating in the exterior of a rotating Kerr black hole. We focus on the phase space region corresponding to orbits that are bounded in space. It will be shown that, although collisions between the gas particles are completely neglected in our model, the gas is subject to a relaxation phenomenon and converges in time to a stationary, axisymmetric configuration surrounding the black hole. This effect, like similar effects encountered in plasma physics and stellar dynamics, is due to the mixing property of the Hamiltonian phase flow, which implies that the one-particle distribution function converges weakly to a distribution function depending only on the constants of motion of the system.
Phase space mixing of a Vlasov gas in the exterior of a Kerr black hole
Next Seminar
New post-Newtonian results for compact binaries in general relativity and scalar-tensor theories
Next Journal Club
Discussion of the paper "Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions", by Marek Lewicki, et al.
Black Hole Workshops
Next workshop:
XVII Black Holes Workshop, Aveiro,
19-20 December 2024
Previous workshops in the series:
I Black Holes Workshop, Porto, 2008
II Black Holes Workshop, Lisbon, 2009
III Black Holes Workshop, Minho, 2010
IV Black Holes Workshop, Aveiro, 2011
V Black Holes Workshop, Lisbon, 2012
VI Black Holes Workshop, Minho 2013
VII Black Holes Workshop, Aveiro 2014
VIII Black Holes Workshop, Lisbon 2015
IX Black Holes Workshop, Minho 2016
X Black Holes Workshop, Aveiro 2017
XI Black Holes Workshop, Lisbon, 2018
XII Black Holes Workshop, Minho, 2019
XIII Black Holes Workshop, Lisbon, 2020
XIV Black Holes Workshop, Aveiro, 2021
XV Black Holes Workshop, Lisbon, 2022
XVI Black Holes Workshop, Porto, 2023
Numerical data
NewFunFICO network
Our group coordinates the Marie Sklodowska Curie Staff Exchange NewFunFiCO network (Jan 2023- Dec 2026)
More info here
FunFiCO Network
Our group coordinates the Marie Curie RISE FunFiCO network (Dec 2017- Dec 2023)
More info here
EuCAPT Consortium
GWVerse COST
StronGrHEP Network
Our group was part of the RISE StronGrHEP network (2016-2019)
Meetings:
Paris, 12-13 May 2016
Azores, 3-8 July 2017
Osaka, 4-8 September 2017
NRHEP Network Meetings
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
First Meeting:
9-13 July 2012, Aveiro, Portugal
Second Meeting:
11-14 March 2013, Lisbon, Portugal
Third Meeting:
6-10 January 2014, Mississippi, USA
Fourth Meeting:
7-10 July 2015, Rome, Italy
Fifth Meeting:
28 Sep-2 Oct 2015, Belém, Brazil
Ph.D. and Post-doctoral opportunities
Contact us If you are interested in pursuing graduate studies/research in our group.
Information for prospective Ph.D. students can be found here.
Past Ph.D. theses from our group can be found here.
Working as a researcher in Portugal - a quick guide.