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.
In: The Astrophysical Journal, 935 (1)
doi: 10.3847/1538-4357/ac7da7
Article, Bibliographie
This is the latest version of this item.
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2022 |
| Creators: | Psaltis, Athanasios ; Arcones, Almudena ; Montes, Fernando ; Mohr, Peter ; Hansen, Camilla Juul ; Jacobi, Maximilian ; Schatz, Hendrik |
| Type of entry: | Bibliographie |
| Title: | Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics |
| Language: | English |
| Date: | 2022 |
| Place of Publication: | Darmstadt |
| Publisher: | IOP Publishing |
| Journal or Publication Title: | The Astrophysical Journal |
| Volume of the journal: | 935 |
| Issue Number: | 1 |
| Collation: | 11 Seiten |
| DOI: | 10.3847/1538-4357/ac7da7 |
| Corresponding Links: | |
| 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. |
| Classification DDC: | 500 Science and mathematics > 530 Physics |
| Divisions: | 05 Department of Physics 05 Department of Physics > Institute of Nuclear Physics |
| Date Deposited: | 02 Aug 2024 12:42 |
| Last Modified: | 02 Aug 2024 12:42 |
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| Suche nach Titel in: | TUfind oder in Google |
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Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics. (deposited 12 Aug 2022 12:04)
- Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics. (deposited 02 Aug 2024 12:42) [Currently Displayed]
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