Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach

T Rauscher, Naomi Nishimura, Raphael Hirschi, Gabriele Cescutti, A. St. J. Murphy, Alexander Heger

Research output: Contribution to conferencePosterOther

Abstract

Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.
Original languageEnglish
Pages010509-1-010509-4
Number of pages4
DOIs
Publication statusPublished - 2017
EventInternational Symposium on Nuclei in the Cosmos 2016 - Toki Messe, Niigata, Japan
Duration: 19 Jun 201624 Jun 2016
Conference number: 14th
http://nic2016.jp/

Conference

ConferenceInternational Symposium on Nuclei in the Cosmos 2016
Abbreviated titleNIC2016
CountryJapan
CityNiigata
Period19/06/1624/06/16
Internet address

Cite this

Rauscher, T., Nishimura, N., Hirschi, R., Cescutti, G., Murphy, A. S. J., & Heger, A. (2017). Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach. 010509-1-010509-4. Poster session presented at International Symposium on Nuclei in the Cosmos 2016, Niigata, Japan. https://doi.org/10.7566/JPSCP.14.010509
Rauscher, T ; Nishimura, Naomi ; Hirschi, Raphael ; Cescutti, Gabriele ; Murphy, A. St. J. ; Heger, Alexander. / Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach. Poster session presented at International Symposium on Nuclei in the Cosmos 2016, Niigata, Japan.4 p.
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title = "Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach",
abstract = "Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.",
author = "T Rauscher and Naomi Nishimura and Raphael Hirschi and Gabriele Cescutti and Murphy, {A. St. J.} and Alexander Heger",
year = "2017",
doi = "10.7566/JPSCP.14.010509",
language = "English",
pages = "010509--1--010509--4",
note = "International Symposium on Nuclei in the Cosmos 2016, NIC2016 ; Conference date: 19-06-2016 Through 24-06-2016",
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Rauscher, T, Nishimura, N, Hirschi, R, Cescutti, G, Murphy, ASJ & Heger, A 2017, 'Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach' International Symposium on Nuclei in the Cosmos 2016, Niigata, Japan, 19/06/16 - 24/06/16, pp. 010509-1-010509-4. https://doi.org/10.7566/JPSCP.14.010509

Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach. / Rauscher, T; Nishimura, Naomi; Hirschi, Raphael; Cescutti, Gabriele; Murphy, A. St. J.; Heger, Alexander.

2017. 010509-1-010509-4 Poster session presented at International Symposium on Nuclei in the Cosmos 2016, Niigata, Japan.

Research output: Contribution to conferencePosterOther

TY - CONF

T1 - Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach

AU - Rauscher, T

AU - Nishimura, Naomi

AU - Hirschi, Raphael

AU - Cescutti, Gabriele

AU - Murphy, A. St. J.

AU - Heger, Alexander

PY - 2017

Y1 - 2017

N2 - Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.

AB - Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.

U2 - 10.7566/JPSCP.14.010509

DO - 10.7566/JPSCP.14.010509

M3 - Poster

SP - 010509-1-010509-4

ER -

Rauscher T, Nishimura N, Hirschi R, Cescutti G, Murphy ASJ, Heger A. Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach. 2017. Poster session presented at International Symposium on Nuclei in the Cosmos 2016, Niigata, Japan. https://doi.org/10.7566/JPSCP.14.010509