The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z ∼ 8
M Curti, F d'Eugenio, S Carniani… - Monthly Notices of …, 2023 - academic.oup.com
We analyse the chemical properties of three z∼ 8 galaxies behind the galaxy cluster
SMACS J0723. 3-7327, observed as part of the Early Release Observations programme of …
SMACS J0723. 3-7327, observed as part of the Early Release Observations programme of …
Redshift Evolution of Electron Density in the Interstellar Medium at z∼ 0–9 Uncovered with JWST/NIRSpec Spectra and Line-spread Function Determinations
Y Isobe, M Ouchi, K Nakajima, Y Harikane… - The Astrophysical …, 2023 - iopscience.iop.org
We present electron densities ne in the interstellar medium (ISM) of star-forming galaxies at
z= 4–9 observed by the JWST/NIRSpec GLASS, Early Release Observations, and CEERS …
z= 4–9 observed by the JWST/NIRSpec GLASS, Early Release Observations, and CEERS …
EMPRESS. XIII. Chemical Enrichment of Young Galaxies Near and Far at z∼ 0 and 4–10: Fe/O, Ar/O, S/O, and N/O Measurements with a Comparison of Chemical …
K Watanabe, M Ouchi, K Nakajima… - The Astrophysical …, 2024 - iopscience.iop.org
We present gas-phase elemental abundance ratios of thirteen local extremely metal-poor
galaxies (EMPGs), including our new Keck/LRIS spectroscopy determinations together with …
galaxies (EMPGs), including our new Keck/LRIS spectroscopy determinations together with …
Improving helium abundance determinations with Leo P as a case study
Currently, the primordial helium abundance is best estimated through spectroscopic
observations of H II regions in metal-poor galaxies. However these determinations are …
observations of H II regions in metal-poor galaxies. However these determinations are …
JADES: Detecting [OIII] λ4363 emitters and testing strong line calibrations in the high-z Universe with ultra-deep JWST/NIRSpec spectroscopy up to z∼ 9.5
IH Laseter, MV Maseda, M Curti, R Maiolino… - Astronomy & …, 2024 - aanda.org
We present ten novel [OIII] λ4363 auroral line detections up to z∼ 9.5 measured from ultra-
deep JWST/NIRSpec MSA spectroscopy from the JWST Advanced Deep Extragalactic …
deep JWST/NIRSpec MSA spectroscopy from the JWST Advanced Deep Extragalactic …
EMPRESS. VII. Ionizing Spectrum Shapes of Extremely Metal-poor Galaxies: Uncovering the Origins of Strong He ii and the Impact on Cosmic Reionization
H Umeda, M Ouchi, K Nakajima, Y Isobe… - The Astrophysical …, 2022 - iopscience.iop.org
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 …
redshift. Although recent studies suggest the existence of nonthermal sources, whether their …
Low-luminosity galaxies in the early universe have observed sizes similar to star cluster complexes
RJ Bouwens, GD Illingworth… - The Astronomical …, 2021 - iopscience.iop.org
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 …
Frontier Fields clusters with star-forming regions, as well as more evolved objects, in the …
Low-redshift compact star-forming galaxies as analogues of high-redshift star-forming galaxies
YI Izotov, NG Guseva, KJ Fricke, C Henkel… - Astronomy & …, 2021 - aanda.org
We compare the relations among various integrated characteristics of∼ 25 000 low-redshift
(z≲ 1.0) compact star-forming galaxies (CSFGs) from Data Release 16 (DR16) of the Sloan …
(z≲ 1.0) compact star-forming galaxies (CSFGs) from Data Release 16 (DR16) of the Sloan …
EMPRESS. IV. Extremely Metal-poor Galaxies Including Very Low-mass Primordial Systems with M*= 104–105 M⊙ and 2%–3%(O/H): High (Fe/O) Suggestive of …
Y Isobe, M Ouchi, A Suzuki, TJ Moriya… - The Astrophysical …, 2022 - iopscience.iop.org
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 …
metal-poor galaxies (EMPGs) selected by a machine-learning technique applied to the deep …
Impact of very massive stars on the chemical evolution of extremely metal-poor galaxies
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 …
almost solar Fe/O ratios are reported, despite N/O ratios consistent with the low metallicity …