University of Hertfordshire

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From the same journal

By the same authors

Heavy elements nucleosynthesis on accreting white dwarfs: Building seeds for the p-process

Research output: Contribution to journalArticlepeer-review

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Heavy elements nucleosynthesis on accreting white dwarfs : Building seeds for the p-process. / Battino, U.; Pignatari, M.; Travaglio, C.; Lederer-Woods, C.; Denissenkov, P.; Herwig, F.; Thielemann, F.; Rauscher, T.

In: Monthly Notices of the Royal Astronomical Society, Vol. 497, No. 4, staa2281, 01.10.2020, p. 4981-4998.

Research output: Contribution to journalArticlepeer-review

Harvard

Battino, U, Pignatari, M, Travaglio, C, Lederer-Woods, C, Denissenkov, P, Herwig, F, Thielemann, F & Rauscher, T 2020, 'Heavy elements nucleosynthesis on accreting white dwarfs: Building seeds for the p-process', Monthly Notices of the Royal Astronomical Society, vol. 497, no. 4, staa2281, pp. 4981-4998. https://doi.org/10.1093/mnras/staa2281

APA

Battino, U., Pignatari, M., Travaglio, C., Lederer-Woods, C., Denissenkov, P., Herwig, F., Thielemann, F., & Rauscher, T. (2020). Heavy elements nucleosynthesis on accreting white dwarfs: Building seeds for the p-process. Monthly Notices of the Royal Astronomical Society, 497(4), 4981-4998. [staa2281]. https://doi.org/10.1093/mnras/staa2281

Vancouver

Battino U, Pignatari M, Travaglio C, Lederer-Woods C, Denissenkov P, Herwig F et al. Heavy elements nucleosynthesis on accreting white dwarfs: Building seeds for the p-process. Monthly Notices of the Royal Astronomical Society. 2020 Oct 1;497(4):4981-4998. staa2281. https://doi.org/10.1093/mnras/staa2281

Author

Battino, U. ; Pignatari, M. ; Travaglio, C. ; Lederer-Woods, C. ; Denissenkov, P. ; Herwig, F. ; Thielemann, F. ; Rauscher, T. / Heavy elements nucleosynthesis on accreting white dwarfs : Building seeds for the p-process. In: Monthly Notices of the Royal Astronomical Society. 2020 ; Vol. 497, No. 4. pp. 4981-4998.

Bibtex

@article{09f33a00897b472fa8e6c597e49b1885,
title = "Heavy elements nucleosynthesis on accreting white dwarfs: Building seeds for the p-process",
abstract = "The origin of the proton-rich trans-iron isotopes in the Solar system is still uncertain. Single-degenerate thermonuclear supernovae (SNIa) with n-capture nucleosynthesis seeds assembled in the external layers of the progenitor's rapidly accreting white dwarf (RAWD) phase may produce these isotopes. We calculate the stellar structure of the accretion phase of five white dwarf (WD) models with initial masses ≥ 0.85 , \mathrm{M⊙ using the stellar code mesa The near-surface layers of the 1, 1.26, 1.32 and 1.38 , \mathrm{M⊙ models are most representative of the regions in which the bulk of the p nuclei are produced during SNIa explosions, and for these models we also calculate the neutron-capture nucleosynthesis in the external layers. Contrary to previous RAWD models at lower mass, we find that the H-shell flashes are the main site of n-capture nucleosynthesis. We find high neutron densities up to several 1015 cm-3 in the most massive WDs. Through the recurrence of the H-shell flashes these intermediate neutron densities can be sustained effectively for a long time leading to high-neutron exposures with a strong production up to Pb. Both the neutron density and the neutron exposure increase with increasing the mass of the accreting WD. Finally, the SNIa nucleosynthesis is calculated using the obtained abundances as seeds. We obtain solar to supersolar abundances for p-nuclei with A > 96. Our models show that SNIa are a viable p-process production site.",
keywords = "stars: Abundances, stars: evolution, stars: interiors",
author = "U. Battino and M. Pignatari and C. Travaglio and C. Lederer-Woods and P. Denissenkov and F. Herwig and F. Thielemann and T. Rauscher",
note = "{\textcopyright} The Author(s) 2020. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.",
year = "2020",
month = oct,
day = "1",
doi = "10.1093/mnras/staa2281",
language = "English",
volume = "497",
pages = "4981--4998",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",

}

RIS

TY - JOUR

T1 - Heavy elements nucleosynthesis on accreting white dwarfs

T2 - Building seeds for the p-process

AU - Battino, U.

AU - Pignatari, M.

AU - Travaglio, C.

AU - Lederer-Woods, C.

AU - Denissenkov, P.

AU - Herwig, F.

AU - Thielemann, F.

AU - Rauscher, T.

N1 - © The Author(s) 2020. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - The origin of the proton-rich trans-iron isotopes in the Solar system is still uncertain. Single-degenerate thermonuclear supernovae (SNIa) with n-capture nucleosynthesis seeds assembled in the external layers of the progenitor's rapidly accreting white dwarf (RAWD) phase may produce these isotopes. We calculate the stellar structure of the accretion phase of five white dwarf (WD) models with initial masses ≥ 0.85 , \mathrm{M⊙ using the stellar code mesa The near-surface layers of the 1, 1.26, 1.32 and 1.38 , \mathrm{M⊙ models are most representative of the regions in which the bulk of the p nuclei are produced during SNIa explosions, and for these models we also calculate the neutron-capture nucleosynthesis in the external layers. Contrary to previous RAWD models at lower mass, we find that the H-shell flashes are the main site of n-capture nucleosynthesis. We find high neutron densities up to several 1015 cm-3 in the most massive WDs. Through the recurrence of the H-shell flashes these intermediate neutron densities can be sustained effectively for a long time leading to high-neutron exposures with a strong production up to Pb. Both the neutron density and the neutron exposure increase with increasing the mass of the accreting WD. Finally, the SNIa nucleosynthesis is calculated using the obtained abundances as seeds. We obtain solar to supersolar abundances for p-nuclei with A > 96. Our models show that SNIa are a viable p-process production site.

AB - The origin of the proton-rich trans-iron isotopes in the Solar system is still uncertain. Single-degenerate thermonuclear supernovae (SNIa) with n-capture nucleosynthesis seeds assembled in the external layers of the progenitor's rapidly accreting white dwarf (RAWD) phase may produce these isotopes. We calculate the stellar structure of the accretion phase of five white dwarf (WD) models with initial masses ≥ 0.85 , \mathrm{M⊙ using the stellar code mesa The near-surface layers of the 1, 1.26, 1.32 and 1.38 , \mathrm{M⊙ models are most representative of the regions in which the bulk of the p nuclei are produced during SNIa explosions, and for these models we also calculate the neutron-capture nucleosynthesis in the external layers. Contrary to previous RAWD models at lower mass, we find that the H-shell flashes are the main site of n-capture nucleosynthesis. We find high neutron densities up to several 1015 cm-3 in the most massive WDs. Through the recurrence of the H-shell flashes these intermediate neutron densities can be sustained effectively for a long time leading to high-neutron exposures with a strong production up to Pb. Both the neutron density and the neutron exposure increase with increasing the mass of the accreting WD. Finally, the SNIa nucleosynthesis is calculated using the obtained abundances as seeds. We obtain solar to supersolar abundances for p-nuclei with A > 96. Our models show that SNIa are a viable p-process production site.

KW - stars: Abundances

KW - stars: evolution

KW - stars: interiors

UR - http://www.scopus.com/inward/record.url?scp=85097412855&partnerID=8YFLogxK

U2 - 10.1093/mnras/staa2281

DO - 10.1093/mnras/staa2281

M3 - Article

AN - SCOPUS:85097412855

VL - 497

SP - 4981

EP - 4998

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

M1 - staa2281

ER -