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Journées de Rencontre des Jeunes Chercheurs 2021

17–23 oct. 2021
Village La Fayette - La Rochelle
Fuseau horaire Europe/Paris

Secrétariat

Session

Cosmology

20 oct. 2021, 12:15
Village La Fayette - La Rochelle

Village La Fayette - La Rochelle

Avenue de Bourgogne, 17041 La Rochelle, France http://www.seminaire-conference-la-rochelle.org https://goo.gl/maps/c2X8hqd9maRShkCm8 The centre is located at about 5 km from the La Rochelle train station (Gare de La Rochelle) and at about 5 km from the La Rochelle airport (Aéroport de La Rochelle-Ile de Ré). The organization will provide a shuttle transportation from both the train station and the airport to the site in the evening of the first day, and from the site to the train station and the airport in the morning of the last day.

Présidents de session

Cosmology

  • Florian Ruppin (IP2I Lyon)

Cosmology

  • Florian Ruppin (IP2I Lyon)

Documents de présentation

Aucun document.

  1. 77. Session overview
    Florian Ruppin (IP2I Lyon)
    20/10/2021 12:15
    Cosmology
  2. 6. Accuracy of Power Spectrum measurements using Scale-Free cosmologies
    Sara Maleubre Molinero (Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE))
    20/10/2021 14:00
    Cosmology

    We exploit a suite of large \emph{N}-body simulations (up to N=$4096^3$) performed with \Abacus, of scale-free models with a range of spectral indices $n$, to better understand and quantify convergence of the matter power spectrum in dark matter only cosmological \emph{N}-body simulations. Using self-similarity to identify converged regions,
    we show that the maximal wavenumber resolved at a...

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  3. 10. Dynamique gravitationnelle des champs scalaires pour la matière noire
    Alexis Boudon (Institut de Physique Théorique - CEA, Saclay)
    20/10/2021 14:23
    Cosmology

    FR:
    La nature de la matière noire est l'un des problèmes les plus importants de la cosmologie et de la physique théorique. Cette composante, qui constitue plus de 80 % de la matière de l'Univers, n'a jusqu'à présent été détectée que par ses effets gravitationnels. Le scénario habituel est celui des "Weakly Interacting Massive Particles" (WIMP). Cependant, de telles particules n'ont toujours...

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  4. 21. Detection of Compact Binary Coalescences and the Multi-Band Template Analysis
    Elisa Nitoglia
    20/10/2021 14:46
    Cosmology

    The Multi-Band Template Analysis (MBTA) is a pipeline suited for searching for
    gravitational waves (GWs) emitted by coalescing compact binary systems (CBCs) in LIGO-Virgo data. It has been used ever since the first generation of interferometric GW detectors in its online configuration, and over the past years it has been improved to provide contributions to GW transient catalogues by...

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  5. 22. False Alarm Rate computation for MBTA single detector triggers
    Vincent Juste (CNRS - IPHC (DRS))
    20/10/2021 15:09
    Cosmology

    The LIGO-Virgo collaboration is using three interferometers and several analysis pipelines in order to observe the sky in search of gravitational waves of different origins. Detected gravitational waves events were usually required to be found in coincidence in at least two detectors in order to be selected as candidates. The increase in sensitivity now enables the search of candidates within...

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  6. 29. Probing local anisotropies using Type Ia Supernovae data
    Melissa Amenouche (Laboratoire de Physique de Clermont)
    20/10/2021 15:32
    Cosmology

    A large variety of cosmological observations has validated the Λ CDM model as the leading one in driving the dynamics of the Universe. This model requires the validity of several assumptions : the Cosmological Principle (homogeneity and isotropy at large scales). Despite numerous successes, the standard model is facing some challenges like the detection of large scale velocity flows.
    Type Ia...

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