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Nucleosynthesis yields of core-collapse supernovae and hypernovae, and galactic chemical evolution
Galactic Chemical Evolution: Carbon through Zinc
We calculate the evolution of heavy-element abundances from C to Zn in the solar neighborhood, adopting our new nucleosynthesis yields. Our yields are calculated for wide ranges of metallicity (Z =…
Nucleosynthesis in Stars and the Chemical Enrichment of Galaxies
After the Big Bang, production of heavy elements in the early Universe takes place starting from the formation of the first stars, their evolution, and explosion. The first supernova explosions have…
Evolution of Dust in Primordial Supernova Remnants: Can Dust Grains Formed in the Ejecta Survive and Be Injected into the Early Interstellar Medium?
We investigate the evolution of dust that formed at Population III supernova (SN) explosions and its processing through the collisions with the reverse shocks resulting from the interaction of the SN…
A neutron-star-driven X-ray flash associated with supernova SN 2006aj
The results indicate that the supernova–GRB connection extends to a much broader range of stellar masses than previously thought, possibly involving different physical mechanisms: a ‘collapsar’ for the more massive stars collapsing to a black hole, and magnetic activity of the nascent neutron star for the less massive stars.
The host galaxy of a fast radio burst
The discovery of a fast radio burst is reported and the identification of a fading radio transient lasting ~6 days after the event, which is used to identify the host galaxy and measure the galaxy’s redshift, which provides a direct measurement of the cosmic density of ionized baryons in the intergalactic medium.
Multi-messenger Observations of a Binary Neutron Star Merger
- B. Abbott, R. Abbott, P. Woudt
- PhysicsProceedings of Multifrequency Behaviour of High…
- 26 October 2019
On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced…
Supernova Nucleosynthesis in Population III 13-50 M☉ Stars and Abundance Patterns of Extremely Metal-poor Stars
We perform hydrodynamic and nucleosynthesis calculations of core-collapse supernovae (SNe) and hypernovae (HNe) of Population (Pop) III stars. We provide new yields for the main-sequence mass of MMS…
The First Chemical Enrichment in the Universe and the Formation of Hyper Metal-Poor Stars
This work argues that these HMP stars are second-generation stars formed from gases that were chemically enriched by the first-generation supernovae, and can reproduce these abundance features with core-collapse “faint” supernova models that include extensive matter mixing and fallback during explosions.
Kilonova from post-merger ejecta as an optical and near-infrared counterpart of GW170817
Recent detection of gravitational waves from a neutron star (NS) merger event GW170817 and identification of an electromagnetic counterpart provide a unique opportunity to study the physical…