Cafe-Club, James PEARSON (The Open University, Milton Keynes, UK): “A large population of strongly lensed faint submillimetre galaxies in future dark energy surveys”.

James PEARSON (The Open University, Milton Keynes, UK), who will talk about “A large population of strongly lensed faint submillimetre galaxies in future dark energy surveys”.

The cafe-club will take place at 2:00 pm [CET] on the AMU virtual room (link below). The broadcast in the Library at LAM will be confirmed on Wednesday reminder.

   https://univ-amu-fr.zoom.us/j/81779670775?pwd=dDNDdTBhcDB6THk5TTg3NkQ5M2hqdz09
(Meeting ID : 817 7967 0775 — Passcode : 749629)

You can find the schedule of upcoming café-clubs and the video of old ones at http://wiki.lam.fr/geco/CafeClub .

Take care,
Carlo, Meriam, Paolo

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ABSTRACT

Bright galaxies at sub-millimetre wavelengths are now well known to be predominantly strongly gravitationally lensed. The same models that successfully predicted this strongly lensed population also predict about one percent of faint 450 micron-selected galaxies from deep JCMT surveys will also be strongly lensed, tending to appear in near-infrared channels only. I will discuss my discovery of a compelling gravitational lens system confirming the lensing population predictions, identified through public JWST imaging of a 450 micron source in the SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) catalogue. Extrapolating to the Euclid-Wide survey, we predict tens of thousands of strongly lensed near-infrared galaxies that will be transformative for the study of dusty star-forming galaxies at cosmic noon, but will be a contaminant population in searches for strongly lensed ultra-high-redshift galaxies in Euclid and Roman.