Black Holes and Neutron Stars in Modified Gravity

18 nov. 2019, 08:05 → 20 nov. 2019, 18:00 Europe/Paris

Salle de conférence du CIAS (Meudon, France)

Thanks to the advent of gravitational wave astronomy (LIGO, Virgo, KAGRA, LISA), as well as to high-angular-resolution observations of black hole vicinity (EHT, VLTI/GRAVITY), new tests of gravity in the strong field regime are becoming available. They offer the potentiality to discriminate between general relativity and alternative theories (generically designed as modified gravity) that are currently developed, notably to address the issue of dark energy in cosmology. This workshop is devoted to the properties of compact objects (black holes, neutron stars, boson stars, etc.) in these theories.

Speakers:

• Aurélien Barrau (Grenoble, France)
• Marco Crisostomi (Trieste, Italy)
• Roberto Emparan (Barcelona, Spain)
• Anastasia Golubtsova (Dubna, Russia)
• Panagiota Kanti (Ioannina, Greece)
• Kostas Kokkotas (Tübingen, Germany)
• Christian Krueger (Tübingen, Germany)
• David Langlois (Paris, France)
• Antoine Lehébel (Nottingham, United Kingdom)
• Raissa Mendes (Rio de Janeiro, Brasil)
• Jordan Nicoules (Meudon, France)
• Vasilisa Nikoforova (Bures-sur-Yvette, France)
• Ippocratis Saltas (Prague, Czech Republic)
• Nikolaos Stergioulas (Thessaloniki, Greece)
• Karim Van Aelst (Meudon, France)

Organisers :

• Laura Bernard (LUTH, Meudon)
• Christos Charmousis (LPT Orsay)
• Eric Gourgoulhon (LUTH, Meudon)
• Philippe Grandclément (LUTH, Meudon)
• Marie Marduel (LUTH, Meudon)
• Karim Noui (Institut Denis Poisson, Tours)

Support: CNRS (80 Prime project TNENGRAV), Observatoire de Paris (CIAS)

lundi 18 novembre

10:00 → 10:50 Exotic compact objects with soft hair

Orateur: Roberto Emparan (ICREA + Universitat de Barcelona )

emparan.pdf

10:50 → 11:20 Pause-café

11:20 → 12:10 Dynamical torsion theory as a bigravity

Orateur: Vasilisa Nikiforova (IHÉS, Bures-sur-Yvette, France)

Meudon-2019.pdf

12:10 → 14:00 Déjeuner

14:00 → 14:50 Probing scalar-tensor theories with highly compact neutron stars

Orateur: Raissa Mendes (Universidade Federal Fluminense, Brasil)

Meudon_RMendes.pdf

14:50 → 15:20 Echoes from horizonless objects

Orateur: Kostas Kokkotas (University of Tuebingen, Germany)

kokkotas.pdf

15:20 → 15:50 Pause-café

15:50 → 16:40 Well-posedness in modified theories of gravity

Orateur: Antoine Lehébel (University of Nottingham, UK)

presentation_meudon.pdf

16:40 → 18:00 Discussions

mardi 19 novembre

10:00 → 10:50 DHOST theories

Orateur: David Langlois (APC, France)

langlois.pdf

10:50 → 11:20 Pause-café

11:20 → 12:10 Einstein-Scalar-Gauss-Bonnet Theories: Black Holes, Wormholes and Particle-like Solutions

Orateur: Panagiota Kanti (University of Ioannina, Greece)

Paris.pdf

12:10 → 14:00 Déjeuner

14:00 → 14:50 Constraining Neutron Star Properties through Gravitational Wave Observations

Orateur: Nikolaos Stergioulas (Aristotle University of Thessaloniki, Greece)

stergioulas.pdf

14:50 → 15:40 Exact black hole solutions of 5D dilaton gravity and its holographic applications

Orateur: Anastasia Golubtsova (BLTP JINR, Russia)

golubtsova.pdf

15:40 → 16:10 Pause-café

16:10 → 17:00 Fast rotating neutron stars

Orateur: Christian Krueger (University of Tuebingen, Germany)

krueger.pdf

17:00 → 17:50 Hairy rotating black holes in the cubic Galileon theory

Orateur: Karim Van Aelst (LUTH, Observatoire de Paris)

vanaelst.pdf

18:00 → 20:00 Buffet

mercredi 20 novembre

10:00 → 10:50 Perturbations of black hole solutions in DHOST theories

Orateur: Marco Crisostomi (Université Paris - Saclay, France)

10:50 → 11:20 Pause-café

11:20 → 12:10 Hearing the strength of gravity (with the Sun)

Orateur: Ippocratis Saltas (CEICO - Czech Academy of Sciences )

saltas.pdf

12:10 → 14:00 Déjeuner

14:00 → 14:50 Quasinormal modes of Schwarzschild black holes in modified and quantum gravity

Orateur: Aurélien Barrau (Université Grenoble-Alpes, France)

barrau.pdf

14:50 → 15:20 Numerical study of a dressed black hole solution in asymptotically AdS spacetime

Orateur: Jordan Nicoules (LUTH, Observatoire de Paris, France)

nicoules.pdf

15:20 → 15:50 Pause-café

15:50 → 17:50 Discussions