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astro-ph.GA2023★ 100 cited
Extreme N-emitters at high-redshift: signatures of supermassive stars and globular cluster or black hole formation in action?
R. Marques-Chaves, D. Schaerer, A. Kuruvanthodi +9
[Abridged] Using the JWST/NIRSpec observations from CEERS we found an extreme N-emitter, CEERS-1019 at z=8.6782 showing intense NIV and NIII emission. From the observed rest-UV and…
astro-ph.GA2023★ 105 cited
N-enhancement in GN-z11: First evidence for supermassive stars nucleosynthesis in proto-globular clusters-like conditions at high redshift ?
C. Charbonnel, D. Schaerer, N. Prantzos +5
Unusually high N/O abundance ratios were recently reported for a very compact, intensively star-forming object GN-z11 at from JWST/NIRSpec observations. We present an empi…
astro-ph.GA2023★ 3 cited
Search strategies for supermassive stars in young clusters and application to nearby galaxies
A. Kuruvanthodi, D. Schaerer, M. Messa +4
Supermassive stars (SMS) with masses , formed by runaway collisions in young, massive, and dense star clusters have been invoked as a possible soluti…