Karl Glazebrook

Dec 24, 2024 | theconversation.com | Karl Glazebrook

On this day three years ago, we witnessed the nail-biting launch of the James Webb Space Telescope (JWST), the largest and most powerful telescope humans have ever sent into space. It took 30 years to build, but in three short years of operation, JWST has already revolutionised our view of the cosmos.

Aug 23, 2024 | nature.com | Karl Glazebrook |Kim-Vy H. Tran |Tucker Jones |Nandini Sahu |Themiya Nanayakkara |Glenn G. Kacprzak | +2 more

AbstractWhile quiescent galaxies have comparable amounts of cool gas in their outer circumgalactic medium (CGM) compared to star-forming galaxies, they have significantly less interstellar gas. However, open questions remain on the processes causing galaxies to stop forming stars and stay quiescent. Theories suggest dynamical interactions with the hot corona prevent cool gas from reaching the galaxy, therefore predicting the inner regions of quiescent galaxy CGMs are devoid of cool gas.

Mar 6, 2024 | nature.com | Kristan Boyett |Michele Trenti |Nicha Leethochawalit |Benjamin Metha |Guido Roberts-Borsani |Paola Santini | +12 more

AbstractJames Webb Space Telescope observations have spectroscopically confirmed the existence of galaxies as early as 300 Myr after the Big Bang and with a higher number density than what was expected based on galaxy formation models and Hubble Space Telescope observations.

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.