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Hi everyone,</div>
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This week we will have two lunch talks. The first will be given by Mathias Urbano, and the second will be given by Paloma Morilla, both on Thursday May 14<sup>th</sup> at 1pm in A113. Both titles and abstracts are below.</div>
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<b>Title:</b> An overview of the Low Surface Brightness Science with the Euclid Space Telescope</div>
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<b>Abstract:</b> During this talk, I will revisit the efforts carried out during my PhD to conduct some of the first studies with Euclid in the Low Surface Brightness (LSB) Universe regime. This will be illustrated through the study of structures spanning three
different angular scales: mock dwarf galaxies that I used to assess Euclid’s detection performance in the LSB regime for objects up to arcminute scales; tidal features investigated within the framework of Euclid’s first test observations within a single observation
(0.56 square degrees); and the intracluster light of the Fornax cluster, which extends over several degrees.</div>
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<b>Title: </b>Signatures of fuzzy dark matter inside radial critical curves</div>
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<b>Abstract:</b> We explore how fuzzy dark matter (FDM) would modify strong gravitational lensing magnification, focusing on the region near radial critical curves. Using simulated galaxy-scale lenses, we compute magnification maps for a range of halo configurations
and axion masses. We find that, compared to standard cold dark matter (CDM), FDM produces a significantly higher probability of strong central magnification, an effect that is difficult to reproduce in CDM (even when subhaloes are included). The strength and
characteristic scale of this enhancement are set primarily by the de Broglie wavelength, and therefore by the axion mass and halo mass. For galaxy-mass haloes, axion masses in the range $m_\phi~10^{-22}-10^{-21}$ eV lead to distinctive magnification distributions.
These results suggest that observations of highly magnified, compact sources near radial arcs could provide a sensitive and complementary test of fuzzy dark matter.</div>
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Cheers,</div>
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Guillaume</div>
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