Speaker
Description
The sizes of galactic disks are known to depend on stellar mass and redshift, with galaxies of a given mass expected to be more compact at higher redshifts. However, observational studies have uncovered disk galaxies at z~3 that have sizes significantly larger than expected from the mass-size relation. Notably, these ‘giant disks’ are preferentially found in proto-clusters, suggesting that over-dense regions facilitate the early formation of such galaxies. In this poster, we present additional promising photometric candidates of giant disks in the early universe (3$<$z$<$7) using JWST NIRCam imaging (F444W) of the contiguous COSMOS field. We also measured the local environment of the galaxies using the CosmicWeb pipeline and n$^{\text{th}}$ nearest neighbour estimates. The environmental density estimates are then used to examine the role of local environments in enabling the formation and survival of such disks.
| Talk category | NOVA Network 1 |
|---|---|
| PhD relevance | 1st |
