We present the merger rate density of Population III binary black holes (BHs) by means of a
widely used binary population synthesis code BSE with extensions to very massive and …

ABSTRACT Population III (Pop. III) binary stars likely produced the first stellar-born binary
black hole (BBH) mergers in the Universe. Here, we quantify the main sources of uncertainty …

Context. Results from observations report a growing number of metal-poor stars showing an
abundance pattern midway between the s-and r-processes. These so-called r/s-stars raise …

In the case of zero-metal (Population III or Pop III) stars, we show that the total mass of binary
black holes from binary Pop III star evolution can be, which agrees with the mass of the …

The composition of the early Solar System can be inferred from meteorites. Many elements
heavier than iron were formed by the rapid neutron capture process (r-process), but the …

ABSTRACT X-ray binaries (XRBs) are thought to regulate cosmic thermal and ionization
histories during the Epoch of Reionization and Cosmic Dawn (z∼ 5–30). Theoretical …

Observing the first generation of stars, Population III (Pop III), is still a challenge even with
the JWST due to their faintness. Instead, searching for fossil records of Pop III stars in nearby …

The first population of X-ray binaries (XRBs) is expected to affect the thermal and ionization
states of the gas in the early Universe. Although these X-ray sources are predicted to have …

Context. Alongside the slow (s) and rapid (r) neutron capture processes, an intermediate
neutron capture process (i-process) is thought to exist. It happens when protons are mixed in …

The first supernovae enrich the previously pristine gas with metals, out of which the next
generation of stars form. Based on hydrodynamical simulations, we develop a new …