LISA data analysis: from classical methods to machine learning

Session

Conference session 1

23 nov. 2022, 14:00

L2IT Toulouse

49. LISA status and data processing organisation

Antoine Petiteau (CEA/IRFU/DPhP)

23/11/2022 14:00

In person talk

8. Trans-dimensional sampling methods: current status and future prospects

Nikolaos Karnesis (AUTh)

23/11/2022 14:30

In person talk

Trans-dimensional Bayesian sampling algorithms have been extensively used in the analysis of simulated LISA data. So far, tools based on Reversible Jump MCMC methods, have been proven to be a good candidate for tackling the LISA global fit problem. In this talk, I will summarize the success of the techniques that have been used to date, as well as their current limitations. These limitations...

24. LISA Data Challenge for the Galaxy

Kristen Lackeos (Max Planck Institute for Radio Astronomy)

23/11/2022 15:00

In person talk

The Laser Interferometer Space Antenna will open a window to gravitational waves (GW) between 0.1 mHz and 1 Hz. The instrument will monitor the entire sky and observe a variety of overlapping signals. GWs from the population ultra compact binaries, numbering millions in our
Galaxy, are predicted to dominate the milli-Hertz frequency band. Galactic binaries are millions of years from merger,...

19. Accelerating parameter estimation of Galactic binaries in the full LISA frequency band using Gaussian Process Regression

Stefan Strub (ETH Zurich)

23/11/2022 16:00

In person talk

We present an end-to-end pipeline using Gaussian Process Regression to model the log-likelihood function for parameters of Galactic binaries. It is expected that tens of millions of Galactic binaries will be the dominant sources of observed gravitational waves, emitting quasi monochromatic gravitational waves, which will be constantly measured by LISA. To resolve as many Galactic binaries as...

6. LISA data analysis in the presence of environmental effects

Laura Sberna (Max Planck Institute for Gravit)

23/11/2022 16:15

In person talk

While negligible for ground-based observatories, environmental effects (peculiar motion, accretion, etc.) will be detectable by LISA in a variety of sources. I will give on overview of the specific effects that are likely to be detected by LISA, the challenges these effects pose for parameter estimation and detection, and some ways to address them.

1. The imprint of gas on gravitational waves from LISA intermediate-mass black hole binaries

Mudit Garg (University of Zurich)

23/11/2022 16:45

In person talk

We study the effect of torques on circular inspirals of intermediate-mass black hole binaries (IMBHBs) embedded in gas discs, wherein both BH masses are in the range 10^2-10^5~MSun, up to redshift z = 10. We focus on how torques impact the detected gravitational wave (GW) waveform in the Laser Interferometer Space Antenna (LISA) frequency band when the binary separation is within a few hundred...

30. Investigation of Tidal Disruption Events through gravitational waves

martina toscani (L2I Toulouse, CNRS/IN2P3, UT3)

23/11/2022 17:00

In person talk

Stars tidally disrupted (TDEs, Rees 1988) by massive black holes (BHs) represent an unprecedented powerful tool to unveil the presence of otherwise quiescent compact objects in the cores of galaxies.
More recently, the scientific community has become aware also of the potential of these events as gravitational wave (GW) sources (Kobayashi et al. 2004, Stone et al. 2013, Toscani et al. 2019,...

5. Identifying LISA verification binaries amongst the Galactic population of double white dwarfs

Christopher Moore (University of Birmingham)

In person talk

Double white dwarfs (DWDs) will be the most numerous GW sources for LISA. Most Galactic DWDs will be unresolved and will form a confusion noise foreground, the dominant LISA noise source around $\sim 0.5-3$ mHz. Around 1% of these sources will stand out from the background and be individually detectable. An even smaller fraction (approximately one in a million) will be known in advance from...