Journée LISA France

Session

Session 2

Nov 20, 2023, 2:00 PM

Salle de l'Espace (CNES Paris Les Halles)

1. Campagne de tests du démonstrateur technologique ZIFO

Maxime VINCENT (AstroParticule et Cosmologie)

11/20/23, 2:00 PM

La contribution française (hardware) au sein du consortium LISA se trouve principalement dans le développement de bancs de test destinés à caractériser les bancs optiques au cœur de l’instrument LISA.

Pour ce faire, un ensemble de démonstrateurs ont été développés afin d’acquérir une expertise dans le domaine de l’interférométrie hétérodyne à basse fréquence, dont le banc optique de...

8. Time-delay interferometry as a coronagraph

Raissa Costa barroso

11/20/23, 2:20 PM

The Laser Interferometer Space Antenna (LISA) will be a space-borne gravitational wave (GW) detector to be launched in the next decade. LISA is designed to be sensitive to GWs in the mHz band and is expected to observe an unprecedented number of sources: quasi-monochromatic sources as galactic binaries (GBs), transient sources such as massive black hole binaries (MBHBs), extreme mass ratio...

4. FOGOB: an optical setup for TTL estimation in LISA

marco nardello (CNRS, OCA Artemis)

11/20/23, 2:40 PM

The now dismissed FF-OGSE was aimed at measuring the Tilt-To-Length coupling on LISA's benches. Its "active" core is the so-called FOGOB optical bench. It delivers a reference beam (REF) and an angular jittering beam (Rx), which are used to probe the longitudinal optical path length variations induced by the Rx tilt at the MOSA level. Such coupling is connected to the internal misalignments...

9. Prototyping a LISA Global-fit Pipeline

Senwen Deng (APC)

11/20/23, 3:00 PM

The LISA observation band is expected to be populated with various
gravitational wave signals overlapping in time and frequency, making the
individual treatment for each source impossible.
We present a global-fit pipeline to disentangle the merging massive
black hole binaries (MBHB) and the inspiralling Galactic white dwarf
binaries (GBs) present in the simulate one-year-long LISA...

12. Detectability of higher harmonics with LISA

Chantal Pitte (cea/Irfu/DPhP)

11/20/23, 3:20 PM

One of the science objectives of LISA is to probe fundamental physics. With the expected large SNR of the coalescence of SMBHB we hope to test General Relativity. Using the full IMR waveform we study the detectability of higher harmonics. With Bayesian analysis, we can discriminate models with different harmonics. Omitting harmonics not only diminishes the SNR but can also lead to biased...

15. Spacetime-Symmetry Breaking and the Generation of Gravitational Waves

Nils Nilsson (SYRTE, Observatoire de Paris)

11/20/23, 3:40 PM

Recently, the search for departures from the symmetries of General Relativity has received significant attention in the literature. In this talk, I outline the techniques for probing the nature of spacetime symmetries using the generation stage of gravitational waves. By using a generic effective-field theory, I show our solution scheme of the modified Einstein equations and I write down the...