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Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics

Psaltis, Athanasios ; Arcones, Almudena ; Montes, Fernando ; Mohr, Peter ; Hansen, Camilla Juul ; Jacobi, Maximilian ; Schatz, Hendrik (2022):
Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics. (Publisher's Version)
In: The Astrophysical Journal, 935 (1), IOP Publishing, e-ISSN 1538-4357,
DOI: 10.26083/tuprints-00021997,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics
Language: English
Abstract:

A promising astrophysical site to produce the lighter heavy elements of the first r-process peak (Z = 38 − 47) is the moderately neutron-rich (0.4 < Y e < 0.5) neutrino-driven ejecta of explosive environments, such as core-collapse supernovae and neutron star mergers, where the weak r-process operates. This nucleosynthesis exhibits uncertainties from the absence of experimental data from (α, xn) reactions on neutron-rich nuclei, which are currently based on statistical model estimates. In this work, we report on a new study of the nuclear reaction impact using a Monte Carlo approach and improved (α, xn) rates based on the Atomki-V2 α optical model potential. We compare our results with observations from an up-to-date list of metal-poor stars with [Fe/H] < −1.5 to find conditions of the neutrino-driven wind where the lighter heavy elements can be synthesized. We identified a list of (α, xn) reaction rates that affect key elemental ratios in different astrophysical conditions. Our study aims to motivate more nuclear physics experiments on (α, xn) reactions using the current and new generation of radioactive beam facilities and also more observational studies of metal-poor stars.

Journal or Publication Title: The Astrophysical Journal
Volume of the journal: 935
Issue Number: 1
Place of Publication: Darmstadt
Publisher: IOP Publishing
Collation: 11 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Divisions: 05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 12 Aug 2022 12:04
Last Modified: 30 Aug 2022 13:24
DOI: 10.26083/tuprints-00021997
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-219975
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21997
PPN: 498709663
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