Early Results From GLASS-JWST. XII. The Morphology of Galaxies at the Epoch of Reionization
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- Treu_2023_ApJL_942_L28
Final published version, 3.06 MB, PDF document
Star-forming galaxies can exhibit strong morphological differences between the rest-frame far-UV and optical, reflecting inhomogeneities in star formation and dust attenuation. We exploit deep, high-resolution, NIRCAM seven-band observations to take a first look at the morphology of galaxies in the epoch of reionization (z > 7), and its variation in the rest-frame wavelength range between Ly alpha and 6000-4000 angstrom, at z = 7-12. We find no dramatic variations in morphology with wavelength-of the kind that would have overturned anything we have learned from the Hubble Space Telescope. No significant trends between morphology and wavelengths are detected using standard quantitative morphology statistics. We detect signatures of mergers/interactions in 4/19 galaxies. Our results are consistent with a scenario in which Lyman-break galaxies-observed when the universe is only 400-800 Myr old-are growing via a combination of rapid, galaxy-scale star formation supplemented by the accretion of star-forming clumps and interactions.
Original language | English |
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Article number | L28 |
Journal | Astrophysical Journal Letters |
Volume | 942 |
Issue number | 2 |
Number of pages | 12 |
ISSN | 2041-8205 |
DOIs | |
Publication status | Published - 10 Jan 2023 |
- DISTANT GALAXIES, EVOLUTION
Research areas
ID: 337658652