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JWST catches the assembly of a ultra-low-mass galaxy
Yoshihisa Asada, Marcin Sawicki, Guillaume Desprez +14
Using CANUCS imaging we found an apparent major merger of two ultra-low-mass galaxies ( each) that are doubly imaged and magnified 12-15$\t…
The first large catalogue of spectroscopic redshifts in Webb's First Deep Field, SMACS J0723.37327
Gaël Noirot, Guillaume Desprez, Yoshihisa Asada +20
We present a spectroscopic redshift catalogue of the SMACS J0723.37327 field ("Webb's First Deep Field") obtained from JWST/NIRISS grism spectroscopy and supplemented with JWST/…
Two lensed star candidates at behind the galaxy cluster MACS J0647.7+7015
Ashish Kumar Meena, Adi Zitrin, Yolanda Jiménez-Teja +24
We report the discovery of two extremely magnified lensed star candidates behind the galaxy cluster MACS J0647.7+7015, in recent multi-band James Webb Space Telescope (JWST) NIRCam…
JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc
E. Vanzella, A. Claeyssens, B. Welch +27
Star cluster formation in the early universe and their contribution to reionization remains to date largely unconstrained. Here we present JWST/NIRCam imaging of the most highly ma…
Early results from GLASS-JWST. XIV: A spectroscopically confirmed protocluster 650 million years after the Big Bang
Takahiro Morishita, Guido Roberts-Borsani, Tommaso Treu +39
We present the spectroscopic confirmation of a protocluster at behind the galaxy cluster Abell2744 (hereafter A2744-z7p9OD). Using JWST NIRSpec, we find seven galaxies wit…
The nature of an ultra-faint galaxy in the cosmic Dark Ages seen with JWST
Guido Roberts-Borsani, Tommaso Treu, Wenlei Chen +44
In the first billion years after the Big Bang, sources of ultraviolet (UV) photons are believed to have ionized intergalactic hydrogen, rendering the Universe transparent to UV rad…