Speaker
Description
The most massive galaxies of the Universe (M_stellar > 10^11 M_Sun) underwent a dramatic metamorphosis, moving from tiny disks at z = 2-3 to the huge spheroids that dominate galaxy clusters in the local Universe. However, their study was thus far hampered by the modest spatial resolution that we could achieve even with the Hubble Space Telescope (HST), as well as not being able to investigate their near infrared restframe in detail. Thanks to the newly-acquired James Webb Space Telescope (JWST) imaging, we are in the perfect position to solve these problems. We select massive galaxies from the ASTRODEEP-GS43 sample (Merlin et al. 2021), the most comprehensive catalogs in GOODS-South --the field containing deepest HST poitings-- to date, and analyse them using single Sersic parametric fitting in the F150W and F277W bands to understand the differences between the quantities that the extragalactic community has measured in both premium telescope facilities. Therefore, our work provides a better understanding about the size and morphological evolution of these objects across 90% of the Universe's lookback time.
| Stream | Science |
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