Atelier API "Ondes gravitationnelles et objets compacts"

Session

Review talk

10 déc. 2025, 14:00

Bâtiment 18 - Salle 204 (Observatoire de Paris - site de Meudon)

19. Making sense of LISA data

Natalia Korsakova (APC)

10/12/2025 14:00

LISA is a signal-dominated instrument that will observe thousands of sources, from binaries in our galaxy to massive black hole binaries at very high redshift. However, the same aspect that makes LISA data so rich also makes it difficult to analyse. I will discuss the challenges that LISA data analysis poses and the ways we can overcome them. In particular, I will focus on two aspects: the...

12. Measuring the cosmic expansion rate with gravitational wave “dark sirens”: prospects and challenges

Dr Sayantani BERA (CPT, Aix-Marseille University)

10/12/2025 15:30

The measurement of the current expansion rate of the Universe, known as the Hubble constant (H0), has garnered significant interest lately, owing to the vastly different estimates obtained when probing different cosmological epochs. In particular, high-redshift measurements of the cosmic microwave background and the local low-redshift measurements using supernovae are statistically...

13. Unveiling the equation of state of dense matter

Lami Suleiman (Deutsches Elektronen Synchrotron)

11/12/2025 10:00

Observations of neutron stars can expand our understanding of strong interaction and help us explore the properties of dense matter in thermodynamic conditions unreachable in laboratories on Earth. In this overview, we discuss the field of extremely dense matter and particularly how gravitational waves combined with other astrophysical detections can constrain the equation of state of dense...

6. Overview of the post-Newtonian formalism

David Trestini (University of Southampton)

11/12/2025 14:10

In this talk, I will give an overview of the Blanchet-Damour formalism for post-Newtonian waveforms. I will cover the treatment of motion, radiation, and radiation reaction.

18. On the Kerr magnetosphere models and the motion of charged particles: the role of symmetries

Jibril BEN ACHOUR (ENS de Lyon / Arnold Sommerfeld Center (Munich))

12/12/2025 09:50

Black holes accrete and eject matter, giving rise to a complicated spectral signature which rise several open questions (low quiescent luminosity, mechanism supporting the emitted jets). They are known to provide a large reservoir of accessible (rotational) energy allowing to accelerated charged particles at very high energy through various mechanisms. In all these processes, the...

16. Gravitational waves from Numerical relativity

Dr Santiago Jaraba (Observatoire astronomique de Strasbourg - CNRS)

12/12/2025 13:50

Numerical relativity (NR) provides the most accurate description of compact binary coalescences and other strong-field phenomena producing gravitational waves (GW). In this talk, I will review the history, main formalisms and current status of NR waveform generation. We will begin with binary black holes, discussing general aspects including GW extraction, as well as addressing current...