Transition from outside-in to inside-out at z~2

By combining high-resolution observations from JWST and HST, we have measured the stellar masses, star formation rates (SFRs), and multi- wavelength morphologies of galaxies in the CANDELS fields. Furthermore, based on rest-frame 1um morphologies, we have derived spatially resolved stellar mass and SFR surface density (Sigma_ and Sigma_SFR) profiles for 46313 galaxies with reliable structural measurements at 02.5), the median radial profile of Sigma_SFR_ is nearly parallel to but slightly steeper than that of Sigma__. This results in mildly negative gradients in the specific SFR (sSFR) profiles across all stellar mass bins considered. These findings indicate that galaxies at z>2.5 cannot grow in size via only in-situ star formation, challenging the understanding of galaxy size evolution beyond the cosmic noon. In contrast, at z<2.0, the sSFR profiles transition to exhibit more and more positive gradients at lower redshifts, consistent with an inside-out growth scenario where star formation preferentially expands the galactic outskirts.

Cone search capability for table J/A+A/709/A205/catalog (Morphology, global physical properties and physical property profiles of 46313 galaxies)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/709/A205
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/709/A205
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/709/A205
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/709/A205
Provenance
Creator Song J.; Wang E.; Jia C.; Lyu C.; Chen Y.; Wang J.; Li F.; Ding W.; Fang G.,Kong X.
Publisher CDS
Publication Year 2026
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy