Author

G. Desprez

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Preprint Sep 2026

The Physical Conditions of Low-Mass Galaxies at z=3.5-7.0 from JWST Spectroscopy: The Behaviour of Spectral Line Ratios with Burstiness

We present a study of the physical conditions of galaxies at redshifts $z=3.5-7.0$, based on emission-line diagnostics of JWST NIRSpec spectra for 1889 star-forming sources spanning more than 4~dex in stellar mass. We find that the median H$\alpha$/H$\beta$ and [OIII]/H$\beta$ are constant throughout these redshifts, i...

Ryan A. Cooper, K. Caputi, A. Marconi et al. · 0 citations

Review Open access Oct 2026

Two Exciting High-redshift Galaxy Candidates Turn Out to Be Two Exciting Brown Dwarfs

From the onset of observations of JWST we have discovered unexpectedly luminous galaxies at redshifts z > 10 and as high as z = 14. With their discovery, the question immediately followed as to where their progenitors are, since such progenitors should be within reach of existing surveys. However, the discovery of seve...

M. Bradač, C. Willott, Y. Asada et al. · Astrophysical Journal Letter... · 0 citations