Speaker
Description
JWST is transforming our understanding of the high-redshift universe and of the epoch of cosmic dawn. In this talk, I will focus on the results from the GLASS-JWST survey and from its follow-up spectroscopic Cycle2 campaign. The first set of GLASS-JWST NIRCam observations led to the discovery of two bright photometric candidates at z~10.5 and z~12.2 providing the first evidence of a puzzling high number density of bright galaxies 300-500 Myr after the Big Bang. A subsequent analysis of GLASS and other programs targeting the foreground cluster A2744 led to the discovery of 7 bright objects at z>9 hinting at the presence of an overdensity in the field. I will discuss the implications of these findings for our understanding of early galaxy evolution, and, in particular, I will present the results from the ongoing deep NIRSpec spectroscopic follow-up which confirms a high number density of z>10 sources in the GLASS/A2744 fields. Finally, I will discuss constraints obtained combining NIRCam and NIRSpec on the ionizing, AGN and clustering properties of galaxies at the earliest epochs probed so far.
| sessioni congresso | Galassie e Cosmologia |
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