How the first stars regulated star formation. II. Enrichment by nearby supernovae

Autor: Daniel J. Whalen, Ke-Jung Chen, Simon C. O. Glover, Ralf S. Klessen, Katharina M. J. Wollenberg
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Astrophysics::High Energy Astrophysical Phenomena
astro-ph.GA
Population
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
0103 physical sciences
Population III [stars]
Astrophysics::Solar and Stellar Astrophysics
Ejecta
education
010303 astronomy & astrophysics
Reionization
Astrophysics::Galaxy Astrophysics
Physics
education.field_of_study
theory [cosmology]
010308 nuclear & particles physics
Star formation
Astronomy and Astrophysics
high redshift [galaxies]
Astrophysics - Astrophysics of Galaxies
Galaxy
early universe
Stars
Supernova
13. Climate action
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
astro-ph.CO
Halo
Astrophysics::Earth and Planetary Astrophysics
intergalactic medium
general [supernovae]
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Chen, K-J, Whalen, D J, Wollenberg, K M J, Glover, S C O & Klessen, R S 2017, ' How the first stars regulated star formation. II. Enrichment by nearby supernovae ', The Astrophysical Journal, vol. 844, no. 2, 111 . https://doi.org/10.3847/1538-4357/aa7b34
Chen, K-J, Whalen, D J, Wollenberg, K M J, Glover, S C O & Klessen, R S 2017, ' How the first stars regulated star formation : enrichment by nearby supernovae ' The Astrophysical Journal, vol. 844, no. 2 . https://doi.org/10.3847/1538-4357/aa7b34
DOI: 10.3847/1538-4357/aa7b34
Popis: Metals from Population III (Pop III) supernovae led to the formation of less massive Pop II stars in the early universe, altering the course of evolution of primeval galaxies and cosmological reionization. There are a variety of scenarios in which heavy elements from the first supernovae were taken up into second-generation stars, but cosmological simulations only model them on the largest scales. We present small-scale, high-resolution simulations of the chemical enrichment of a primordial halo by a nearby supernova after partial evaporation by the progenitor star. We find that ejecta from the explosion crash into and mix violently with ablative flows driven off the halo by the star, creating dense, enriched clumps capable of collapsing into Pop II stars. Metals may mix less efficiently with the partially exposed core of the halo, so it might form either Pop III or Pop II stars. Both Pop II and III stars may thus form after the collision if the ejecta do not strip all the gas from the halo. The partial evaporation of the halo prior to the explosion is crucial to its later enrichment by the supernova.
Comment: Accepted to ApJ
Databáze: OpenAIRE
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