Pascal Oesch

Feb 14, 2024 | nature.com | Karl Glazebrook |Themiya Nanayakkara |Claudia Lagos |Gabriel Brammer |Ivo Labbe |Pascal Oesch | +4 more

AbstractThe formation of galaxies by gradual hierarchical co-assembly of baryons and cold dark matter halos is a fundamental paradigm underpinning modern astrophysics[1, 2] and predicts a strong decline in the number of massive galaxies at early cosmic times[3–5].

Feb 14, 2024 | nature.com | Lukas J. Furtak |Ivo Labbe |Adi Zitrin |Anna de Graaff |Rachel Bezanson |Gabriel Brammer | +14 more

AbstractEarly JWST observations have uncovered a new population of red sources that might represent a previously overlooked phase of supermassive black hole growth1−−3. One of the most intriguing examples is an extremely red, point-like object that was found to be triply-imaged by the strong lensing (SL) cluster Abell 27444. Here we present deep JWST/NIRSpec observations of this object, Abell2744-QSO1.