Simulations show that 10-30% pollution from supermassive star ejecta reproduces the nitrogen-enhanced abundance pattern of GN-z11 and some other high-z galaxies.
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5 Pith papers cite this work. Polarity classification is still indexing.
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astro-ph.GA 5representative citing papers
Galaxies at z>1 show N/O ratios elevated by a median 0.18 dex at fixed O/H relative to local trends, reaching 0.4-0.5 dex at low metallicity.
N/O ratios in z~3 star-forming galaxies are indistinguishable from low-redshift values over the metallicity range 12+log(O/H)=7.5-8.44.
GHZ2 at z=12.3 shows a stratified ISM with coexisting density zones and needs an additional hard ionising component beyond pure radiation-bounded stellar models to match its emission lines and variability.
New SBF distance confirms NGC5846_UDG1 lies in the NGC 5846 group and reconciles prior GC counts to ~50 members, supporting a massive dark matter halo.
citing papers explorer
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Nitrogen enhancement of GN-z11 by metal pollution from supermassive stars
Simulations show that 10-30% pollution from supermassive star ejecta reproduces the nitrogen-enhanced abundance pattern of GN-z11 and some other high-z galaxies.
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Tracing nitrogen enrichment across cosmic time with JWST
Galaxies at z>1 show N/O ratios elevated by a median 0.18 dex at fixed O/H relative to local trends, reaching 0.4-0.5 dex at low metallicity.
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Nitrogen abundances in star-forming galaxies 2.2 Gyr after the Big Bang are not elevated
N/O ratios in z~3 star-forming galaxies are indistinguishable from low-redshift values over the metallicity range 12+log(O/H)=7.5-8.44.
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Investigating ionising sources and the complex interstellar medium of GHZ2 at $z=12.3$
GHZ2 at z=12.3 shows a stratified ISM with coexisting density zones and needs an additional hard ionising component beyond pure radiation-bounded stellar models to match its emission lines and variability.
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Revisiting the distance and the globular cluster system of the remarkable galaxy UDG1 in the NGC 5846 group
New SBF distance confirms NGC5846_UDG1 lies in the NGC 5846 group and reconciles prior GC counts to ~50 members, supporting a massive dark matter halo.