The oldest, most metal-poor stars in the Galactic halo and satellite dwarf galaxies present an
opportunity to explore the chemical and physical conditions of the earliest star-forming …

The first stars are believed to have formed a few hundred million years after the big bang in
so-called dark matter minihalos with masses∼ 10 6 M⊙ ∼10^6M_⊙. Their radiation lit up …

In recent years, the discovery of massive quasars at has provided a striking challenge to our
understanding of the origin and growth of supermassive black holes in the early Universe …

Supermassive stars (SMSs) forming via very rapid mass accretion ($\dot {M} _*\gtrsim 0.1\,
M_\odot {\rm\, yr}^{-1} $) could be precursors of supermassive black holes observed beyond …

Observed supermassive black holes in the early Universe have several proposed formation
channels in part because most of these channels are difficult to probe. One of the more …

The first stars are the key to the formation of primitive galaxies, early cosmological
reionization and chemical enrichment, and the origin of supermassive black holes …

Massive stars that end their lives with helium cores in the range of 35–65 M☉ are known to
produce repeated thermonuclear outbursts due to a recurring pair-instability. In some of …

Supermassive stars forming at z∼ 15–20 are one of the leading contenders for the origin of
the first quasars, over 200 of which have now been discovered at z> 6. These stars likely …

We study the collapse of rapidly rotating supermassive stars that may have formed in the
early Universe. By self-consistently simulating the dynamics from the onset of collapse using …

The origins of the∼ 109 M⊙ quasar supermassive black holes (BHs) at redshifts z> 6
remain a theoretical puzzle. One possibility is that they grew from∼ 105 M⊙ BHs formed in …