Elbereth conference 2024

Session

Session 10

1 mars 2024, 12:00

Amphithéâtre Henri Mineur (Institut d'Astrophysique de Paris)

41. Deep learning for focal plane wavefront control for direct imaging of exoplanets

Yann Gutierrez (Observatoire de Paris/LESIA)

01/03/2024 12:00

Oral presentation

Direct imaging of exoplanets will facilitate the search for habitable worlds by enabling the generalized characterization of their atmospheres. High-contrast imaging instruments equipped with coronagraphs suppress starlight, allowing the detection of faint exoplanetary companions. However, optical aberrations introduce starlight residuals (speckles) that hinder the detection performance in the...

34. Test of Cosmic Web-Feeding Model for Star Formation in Galaxy Clusters in the COSMOS Field

Mlle Eunhee Ko (IAP)

01/03/2024 12:15

Oral presentation

It is yet to be understood what controls the star formation activity in high-redshift galaxy clusters. One recently proposed mechanism is that galaxy clusters can remain star-forming when fed by infalling groups and star-forming galaxies from large-scale structures surrounding them. Using the COSMOS2020 catalog that has half a million galaxies with high accuracy ($\sigma_{\Delta z /1+z} \sim...

47. A hierarchical approach for field level inference using Quijote Simulations

Anirban BAIRAGI (IAP)

01/03/2024 12:30

Oral presentation

Advancing cosmological parameter inference with reduced uncertainties is a vibrant area of research, especially with the wealth of data from next-generation surveys like Euclid, DESI, and the Vera Rubin Observatory. This talk focuses on Simulation-Based Inference (SBI), utilizing summary statistics such as the Power Spectrum P(k) and Bispectrum B(k). However, these summaries fail to fully...

26. Collision Course: Reevaluating the Origin of Mars' Moons through Orbital Simulations

Ryan Dahoumane (IMCCE, Observatoire de Paris)

01/03/2024 12:45

Oral presentation

This conference presentation delves into recent advancements in understanding the formation and evolution of Mars' moons, Phobos and Deimos. Building upon Bagheri et al.'s 2021 hypothesis suggesting the dislocation of a larger progenitor as the origin of these moons, the study by Hyodo et al. in 2022 challenges this idea. Hyodo et al. argue that under reasonable assumptions about the...

31. Phobos photometic properties from Mars Express HRSC observations

Antonin Wargnier (LESIA - Observatoire de Paris)

01/03/2024 13:00

Oral presentation

The Mars Express mission has been orbiting Mars since 2004, and it has acquired several observations of Phobos which were never published in the literature. We have analyzed resolved images of Phobos, available at the ESA Planetary Science archive, acquired between 2004 and 2022 by the High Resolution Stereo Camera (HRSC) on board the Mars Express spacecraft. We used both data acquired with...

39. MODÉLISATION DU CYCLE DES POUSSIÈRES SUR LA PLANÈTE MARS

Thomas Pierron

01/03/2024 13:15

Oral presentation

Le climat et la météorologie de la planète Mars que nous connaissons aujourd'hui sont contrôlés par la présence d'aérosols minéraux soulevés par les vents qui créent de véritables tempêtes de poussières. Ces tempêtes peuvent être locales, régionales, et même certaines années globales. Dans ce dernier cas la quasi-totalité de la planète est alors cachée sous une épaisse couche de poussière....