GN-z11 is an unusually luminous high-redshift galaxy that was recently observed to have
strong nitrogen lines while at the same time lacking traditional signatures of active galactic …

In recent years, the formation and evolution of rapidly accreting supermassive stars has
received significant attention in the hope of better understanding the origin of high redshift …

The recent discovery of a 4× 10 7 M⊙ black hole (BH) in UHZ1 at z= 10.3, just 450 Myr after
the Big Bang, suggests that the seeds of the first quasars may have been direct-collapse …

Context. The first stars formed over five orders of magnitude in mass by accretion in
primordial dark matter halos. Aims. We study the evolution of massive, very massive and …

Context. The collapse of supermassive stars (SMSs) via the general-relativistic (GR)
instability would provide a natural explanation for the existence of the most extreme quasars …

In this paper, we revisit metal-enriched rotating pair-instability supernovae (PISNe) models
for metallicities consistent with the Small Magellanic Cloud, the Large Magellanic Cloud …

The assembly of supermassive black holes poses a challenge primarily because of
observed quasars at high redshift, but additionally because of the current lack of …