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Nucleosynthetic yields from neutron stars accreting in binary common envelopes (2019)
Journal Article
Keegans, J. D., Fryer, C. L., Jones, S. W., Côté, B., Belczynski, K., Herwig, F., …Diget, C. A. (in press). Nucleosynthetic yields from neutron stars accreting in binary common envelopes. Monthly notices of the Royal Astronomical Society, 000, 1-20. doi:10.1093/mnras/stz368

Massive-star binaries can undergo a phase where one of the two stars expands during its advanced evolutionary stage as a giant and envelops its companion, ejecting the hydrogen envelope and tightening its orbit. Such a common envelope phase is requir... Read More

Enrichment of the Galactic disc with neutron capture elements: Sr ⋆ † (2019)
Journal Article
Mishenina, T., Pignatari, M., Gorbaneva, T., Bisterzo, S., Travaglio, C., Thielemann, F., & Soubiran, C. (in press). Enrichment of the Galactic disc with neutron capture elements: Sr ⋆ †. Monthly notices of the Royal Astronomical Society, 000, 1-21

The enrichment history of heavy neutron-capture elements in the Milky Way disc provides fundamental information about the chemical evolution of our Galaxy and about the stellar sources that made those elements. In this work we give new observational... Read More

The s process in AGB stars as constrained by a large sample of barium stars (2018)
Journal Article
Cseh, B., Lugaro, M., D'Orazi, V., de Castro, D. B., Pereira, C. B., Karakas, A. I., …Cristallo, S. (2018). The s process in AGB stars as constrained by a large sample of barium stars. Astronomy and astrophysics, 620, doi:10.1051/0004-6361/201834079

© ESO 2018. Context. Barium (Ba) stars are dwarf and giant stars enriched in elements heavier than iron produced by the slow neutron-capture process (s process). These stars belong to binary systems in which the primary star evolved through the asymp... Read More

Role of Core-collapse Supernovae in Explaining Solar System Abundances of p Nuclides (2018)
Journal Article
Travaglio, C., Rauscher, T., Heger, A., Pignatari, M., & West, C. (2018). Role of Core-collapse Supernovae in Explaining Solar System Abundances of p Nuclides. The Astrophysical journal, 854(1), (18). doi:10.3847/1538-4357/aaa4f7. ISSN 0004-637X

The production of the heavy stable proton-rich isotopes between 74Se and 196Hg—the p nuclides—is due to the contribution from different nucleosynthesis processes, activated in different types of stars. Whereas these processes have been subject to var... Read More

Role of core-collapse supernovae in explaining Solar System abundances of p nuclides (2018)
Journal Article
Travaglio, C., Rauscher, T., Heger, A., Pignatari, M., & West, C. (2018). Role of core-collapse supernovae in explaining Solar System abundances of p nuclides. The Astrophysical journal, 854(1), doi:10.3847/1538-4357/aaa4f7. ISSN 0004-637X

The production of the heavy stable proton-rich isotopes between 74Se and 196Hg—the p nuclides—is due to the contribution from different nucleosynthesis processes, activated in different types of stars. Whereas these processes have been subject to var... Read More

Determination of alpha spectroscopic factors for unbound 17O states (2017)
Journal Article
De Séréville, N., Meyer, A., Hammache, F., Laird, A. M., & Pignatari, M. (2017). Determination of alpha spectroscopic factors for unbound 17O states. EPJ Web of Conferences, 165, 01022. doi:10.1051/epjconf/201716501022

© The Authors, published by EDP Sciences, 2017. It has been recently suggested that hydrogen ingestion into the helium shell of massive stars could lead to high 13 C and 15 N excesses when the blast of a core collapse supernova (ccSN) passes through... Read More

Pop III i-process nucleosynthesis and the elemental abundances of SMSS J0313-6708 and the most iron-poor stars (2017)
Journal Article
Clarkson, O., Herwig, F., & Pignatari, M. (2018). Pop III i-process nucleosynthesis and the elemental abundances of SMSS J0313-6708 and the most iron-poor stars. Monthly notices of the Royal Astronomical Society. Letters, 474(1), L37-L41. doi:10.1093/mnrasl/slx190

© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We have investigated a highly energetic H-ingestion event during shell He burning leading to H-burning luminosities of log (L H /L ⊙ ) ~ 13 in a 4... Read More

Precise measurement of the thermal and stellar Fe 54 (n,γ) Fe 55 cross sections via accelerator mass spectrometry (2017)
Journal Article
Wallner, A., Buczak, K., Belgya, T., Bichler, M., Coquard, L., Dillmann, I., …Pignatari, M. (2017). Precise measurement of the thermal and stellar Fe 54 (n,γ) Fe 55 cross sections via accelerator mass spectrometry. Physical Review C, 96(2), doi:10.1103/PhysRevC.96.025808

© 2017 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the a... Read More

Convective–reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O–C shell mergers (2017)
Journal Article
Ritter, C., Andrassy, R., Côté, B., Herwig, F., Woodward, P. R., Pignatari, M., & Jones, S. (2018). Convective–reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O–C shell mergers. Monthly notices of the Royal Astronomical Society. Letters, 474(1), L1-L6. doi:10.1093/mnrasl/slx126

© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We address the deficiency of odd-Z elements P, Cl, K and Sc in Galactic chemical evolution models through an investigation of the nucleosynthesis... Read More

Stellar origin of 15N-rich presolar SiC grains of type AB: Supernovae with explosive hydrogen burning (2017)
Journal Article
Liu, N., Pignatari, M., Nittler, L. R., Alexander, C. M. O., & Wang, J. (2017). Stellar origin of 15N-rich presolar SiC grains of type AB: Supernovae with explosive hydrogen burning. The Astrophysical journal, 842(1), L1. doi:10.3847/2041-8213/aa74e5

© 2017. The American Astronomical Society. All rights reserved. We report C, N, and Si isotopic data for 59 highly 13 C-enriched presolar submicron-to micron-sized SiC grains from the Murchison meteorite, including eight putative nova grains (PNGs)... Read More

Iron and nickel isotope compositions of presolar silicon carbide grains from supernovae (2017)
Journal Article
Kodolányi, J., Stephan, T., Trappitsch, R., Hoppe, P., Pignatari, M., Davis, A. M., & Pellin, M. J. (2018). Iron and nickel isotope compositions of presolar silicon carbide grains from supernovae. Geochimica et cosmochimica acta, 221, 127-144. doi:10.1016/j.gca.2017.05.029

© 2017 Elsevier Ltd. We report the carbon, silicon, iron, and nickel isotope compositions of twenty-five presolar SiC grains of mostly supernova (SN) origin. The iron and nickel isotope compositions were measured with the new Chicago Instrument for L... Read More

A chemical signature from fast-rotating low-metallicity massive stars: ROA 276 in ω Centauri (2017)
Journal Article
Pignatari, M., Costa, G. S. D., Hirschi, R., Karakas, A. I., Norris, J. E., Shingles, L. J., …Yong, D. (2017). A chemical signature from fast-rotating low-metallicity massive stars: ROA 276 in ω Centauri. The Astrophysical journal, 837(2), 176. doi:10.3847/1538-4357/aa6250

© 2017. The American Astronomical Society. All rights reserved. We present a chemical abundance analysis of a metal-poor star, ROA 276, in the stellar system ω Centauri. We confirm that this star has an unusually high [Sr/Ba] abundance ratio. Additio... Read More