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ORIGINS Lensing Day

November 14, 2024
MIAPbP@ORIGINS
Europe/Berlin timezone

Conor O'Riordan

Session

Afternoon session 1

Nov 14, 2024, 2:10 PM
MIAPbP Seminar Room (MIAPbP@ORIGINS)

MIAPbP Seminar Room

MIAPbP@ORIGINS

https://www.munich-iapbp.de/contact

Conveners

Afternoon session 1

  • Conor O'Riordan (Max Planck Institute for Astrophysics)

Description

Galaxy scale modelling and substructure

Presentation materials

There are no materials yet.

  1. 18. Low redshift Strong Lensing
    Leon Roman Ecker (LMU Munich (USM)/ Max-Planck Institute for extraterrestrial physics (MPE))
    11/14/24, 2:10 PM
    Contributed talk

    The Euclid mission is expected to discover approximately 150,000 strong gravitational lenses, greatly expanding the known lens population (Collett et al. 2015). Low-redshift early-type galaxies (ETGs) offer a unique opportunity to probe the stellar initial mass function (IMF) as their Einstein radii, typically smaller than the effective radius, enable mass measurements more sensitive to...

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  2. 16. Strong-lensing and kinematic analysis of CASSOWARY 31: can strong lensing constrain the masses of multi-plane lenses?
    Han Wang (MPA/TUM)
    11/14/24, 2:30 PM
    Contributed talk

    We present a mass measurement for the secondary lens along the line of sight (LoS) in the multi-plane strong lens modeling of the group-scale lens CASSOWARY 31 (CSWA 31). The secondary lens at redshift z = 1.49 is a spiral galaxy well aligned along the LoS with the main lens at z = 0.683. Using the MUSE integral-field spectroscopy of this spiral galaxy, we measure its rotation velocities and...

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  3. 20. Modelling of the Quadruply Lensed Quasar WG J0214-2105 for Time-delay Cosmography
    Allan Schweinfurth (TUM / MPA)
    11/14/24, 2:50 PM
    Contributed talk

    Strong gravitational lensing is an astrophysical effect that happens when the gravitational field of a massive object bends light from a background source, creating multiple, often distorted, images of the same distant object. Accurate modelling of the mass distribution of strong gravitational lenses is crucial in order to use them as astrophysical and cosmological probes, such as for...

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  4. 5. Subhaloes vs. line-of-sight haloes
    Maryam Tajalli (Max Planck Institute for Astrophysics)
    11/14/24, 3:10 PM
    Contributed talk

    Strong gravitational lensing has proven to be a promising tool for detecting low-mass haloes through observing perturbations in the lensing potential, therefore allowing the testing of different dark matter (DM) models by comparing the theoretical predictions for the abundance of such haloes in different DM models with observations. However, to robustly constrain the mass function of low-mass...

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  5. 23. Sequential simulation-based inference for strong gravitational lensing images
    Noemi Anau Montel (MPA)
    11/14/24, 3:30 PM

    Galaxy-galaxy strong gravitational lenses provide a unique laboratory for probing small-scale structures and testing the $\Lambda$CDM paradigm. However, performing precise statistical analysis of such observations is extremely challenging since it requires disentangling the source galaxy’s light from the lens’ mass distribution and marginalizing over different dark matter substructure...

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