Discovery of a very metal-poor galaxy overdensity of 17 members near a possible Pop III-enriched absorber at z=5.945, with estimated minimum halo mass of log(M_h,min/M_⊙)=10.68.
The search for Population III: Confirmation of a HeII emitter with no metal lines at z=10.6
10 Pith papers cite this work. Polarity classification is still indexing.
10
Pith papers citing it
abstract
We report the confirmation of a HeII$\lambda$1640 emitter located at 3 pkpc from the galaxy GN-z11, at z=10.6. The detection, based on JWST NIRSpec-IFU high-resolution spectroscopy, confirms a previous claim based on medium-resolution spectroscopy. The HeII$\lambda$1640 identification is further supported by the independent detection of H$\gamma$ obtained by \"Ubler et al. (2026) at the same location. The HeII emission is spectrally resolved in two components separated by 120 km/s. The Equivalent Width of the HeII emission is extremely high ($>$20 A). No metal lines are detected. We argue that Population III stars are the most plausible explanation for the observed He II emission, with no satisfactory alternative from other classes of sources or mechanisms.
fields
astro-ph.GA 10years
2026 10representative citing papers
Pixel-by-pixel SBI modeling recovers young massive Pop III clumps at up to 90 percent rate in favorable JWST-like configurations while integrated analyses fail due to contamination.
JWST absorption spectra of galaxies at z~8-9 show metal-poor gas with high [C/O] suggesting enrichment by Population III supernovae.
New stack-based strong-line calibrations from ~1500 spectra yield mass-metallicity relations at z=1-10 with decreasing metallicity toward higher redshift and no slope change, plus 50 EMPG candidates at 1-4% solar metallicity showing large scatter and opposite sSFR trends.
Discovery of an overdense 'Cosmic Archipelago' of young metal-poor star-forming galaxies at z~6.14 with one detailed example showing high Lyman-continuum escape fraction suggesting significant contribution to cosmic reionization.
High-redshift HeII emitter observations confirm a >50% PopIII stellar mass fraction and favor top-heavy IMFs for the first stars with total masses 2e4 to 6e5 solar masses.
Existing HeII emission-line diagnostics identify pure Pop III galaxies but fail for hybrid Pop III/Pop II systems, introducing spectral degeneracies that hide residual first stars.
Low-energy PISNe from 140 solar-mass Pop III stars produce second-generation stars at median [Fe/H] ~ -5.5 with odd-even patterns, but their absence from EMP observations disfavors PISNe as the main early enrichment channel.
Cosmological simulations and SED modeling favor a Pop III star cluster of a few ×10^5 M_sun over an accreting SMBH as the power source for the He II emitter Hebe near GN-z11 at z=10.6.
citing papers explorer
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Possible chemical signatures of first-star enrichment in a very metal-poor galaxy overdensity near the end of reionization
Discovery of a very metal-poor galaxy overdensity of 17 members near a possible Pop III-enriched absorber at z=5.945, with estimated minimum halo mass of log(M_h,min/M_⊙)=10.68.
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A Pixel-by-Pixel Path to Population III Discovery with JWST
Pixel-by-pixel SBI modeling recovers young massive Pop III clumps at up to 90 percent rate in favorable JWST-like configurations while integrated analyses fail due to contamination.
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Chemical signatures from the first stars embedded in metal-poor gas in galaxies at cosmic dawn
JWST absorption spectra of galaxies at z~8-9 show metal-poor gas with high [C/O] suggesting enrichment by Population III supernovae.
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JADES: the mass-metallicity relation at $z=1-10$. New calibrations, extremely metal-poor galaxies, and chemical diversity
New stack-based strong-line calibrations from ~1500 spectra yield mass-metallicity relations at z=1-10 with decreasing metallicity toward higher redshift and no slope change, plus 50 EMPG candidates at 1-4% solar metallicity showing large scatter and opposite sSFR trends.
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A Cosmic Archipelago of lensed metal-poor galaxies at $z\sim6$
Discovery of an overdense 'Cosmic Archipelago' of young metal-poor star-forming galaxies at z~6.14 with one detailed example showing high Lyman-continuum escape fraction suggesting significant contribution to cosmic reionization.
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The Pristine HeII Emitter near GN-z11: Constraining the Mass Distribution of the First Stars
High-redshift HeII emitter observations confirm a >50% PopIII stellar mass fraction and favor top-heavy IMFs for the first stars with total masses 2e4 to 6e5 solar masses.
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On the detection of Population III galaxies: Emission Line Diagnostics for Hybrid Stellar Populations
Existing HeII emission-line diagnostics identify pure Pop III galaxies but fail for hybrid Pop III/Pop II systems, introducing spectral degeneracies that hide residual first stars.
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Metal Enrichment by the First Stars Exploding at the Lower Energy Limit of Pair-Instability Supernovae
Low-energy PISNe from 140 solar-mass Pop III stars produce second-generation stars at median [Fe/H] ~ -5.5 with odd-even patterns, but their absence from EMP observations disfavors PISNe as the main early enrichment channel.
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What is Powering the Enigmatic He II Emitter Hebe: The First Stars or Black Holes?
Cosmological simulations and SED modeling favor a Pop III star cluster of a few ×10^5 M_sun over an accreting SMBH as the power source for the He II emitter Hebe near GN-z11 at z=10.6.
- How can we finally see the first light? Status and perspective in the search for Population III stars