We present morphologies of galaxies at z≳ 9 resolved by JWST/NIRCam 2–5 μm imaging.
Our sample consists of 22 galaxy candidates identified by stringent dropout and photo-z …

We present gas-phase elemental abundance ratios of thirteen local extremely metal-poor
galaxies (EMPGs), including our new Keck/LRIS spectroscopy determinations together with …

Strong high-ionization lines such as He ii of young galaxies are puzzling at high and low
redshift. Although recent studies suggest the existence of nonthermal sources, whether their …

We compare the sizes and luminosities of faint z= 6–8 galaxies magnified by the Hubble
Frontier Fields clusters with star-forming regions, as well as more evolved objects, in the …

We present Keck/LRIS follow-up spectroscopy for 13 photometric candidates of extremely
metal-poor galaxies (EMPGs) selected by a machine-learning technique applied to the deep …

Context. In recent observations of extremely metal-poor, low-mass, starburst galaxies,
almost solar Fe/O ratios are reported, despite N/O ratios consistent with the low metallicity …

We study emission line profiles of 21 nearby low-mass (M*= 10 4–10 7 M⊙) galaxies in
deep medium-high resolution spectra taken with Magellan/MagE. These low-mass galaxies …

We present the demography of the dynamics and gas mass fraction of 33 extremely metal-
poor galaxies (EMPGs) with metallicities of 0.015–0.195 Z⊙ and low stellar masses of 10 4 …

Observations suggest that the amount of galactic dust in the Universe decreased by a factor
of∼ 2–3 during the last∼ 8 Gyr. However, cosmological models of galaxy evolution usually …

We search for local extremely metal-poor galaxies (EMPGs), selecting photometric
candidates by broadband color excess and machine-learning techniques with the SDSS …