Outputs (33)

Galactic chemical evolution of radioactive isotopes (2019)
Journal Article
Côté, B., Lugaro, M., Reifarth, R., Pignatari, M., Világos, B., Yagüe, A., & Gibson, B. K. (2019). Galactic chemical evolution of radioactive isotopes. The Astrophysical journal, 878(2), Article 156. https://doi.org/10.3847/1538-4357/ab21d1

The presence of short-lived (∼ Myr) radioactive isotopes in meteoritic inclusions at the time of their formation represents a unique opportunity to study the circumstances that led to the formation of the Solar System. To interpret these observations... Read More about Galactic chemical evolution of radioactive isotopes.

Using failed supernovae to constrain the Galactic r-process element production (2019)
Journal Article
Wehmeyer, B., Wehmeyer, B., Fröhlich, C., Fröhlich, C., Côté, B., Côté, B., Pignatari, M., Pignatari, M., Thielemann, F.-K., & Thielemann, F. K. (2019). Using failed supernovae to constrain the Galactic r-process element production. Monthly notices of the Royal Astronomical Society, 487(2), 1745-1753. https://doi.org/10.1093/mnras/stz1310

Rapid neutron capture process (r-process) elements have been detected in a large fraction of metal-poor halo stars, with abundances relative to iron (Fe) that vary by over two orders of magnitude. This scatter is reduced to less than a factor of 3 in... Read More about Using failed supernovae to constrain the Galactic r-process element production.

Neutron star mergers might not be the only source of r-process elements in the Milky Way (2019)
Journal Article
Côté, B., Eichler, M., Arcones, A., Hansen, C. J., Simonetti, P., Frebel, A., Fryer, C. L., Pignatari, M., Reichert, M., Belczynski, K., & Matteucci, F. (2019). Neutron star mergers might not be the only source of r-process elements in the Milky Way. The Astrophysical journal, 875(2), 106. https://doi.org/10.3847/1538-4357/ab10db

Probing the origin of r-process elements in the universe represents a multidisciplinary challenge. We review the observational evidence that probes the properties of r-process sites, and address them using galactic chemical evolution simulations, bin... Read More about Neutron star mergers might not be the only source of r-process elements in the Milky Way.

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. K., & Soubiran, C. (2019). Enrichment of the Galactic disc with neutron capture elements: Sr. Monthly notices of the Royal Astronomical Society, 484(3), 3846-3864. https://doi.org/10.1093/mnras/stz178

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 about Enrichment of the Galactic disc with neutron capture elements: Sr.

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., Pignatari, M., Laird, A. M., & Diget, C. A. (2019). Nucleosynthetic yields from neutron stars accreting in binary common envelopes. Monthly notices of the Royal Astronomical Society, 485(1), 620-639. https://doi.org/10.1093/mnras/stz368

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. 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 com... Read More about Nucleosynthetic yields from neutron stars accreting in binary common envelopes.

Enrichment of the Galactic disc with neutron-capture elements: Mo and Ru (2019)
Journal Article
Mishenina, T., Pignatari, M., Gorbaneva, T., Travaglio, C., Côté, B., Thielemann, F.-K., & Soubiran, C. (2019). Enrichment of the Galactic disc with neutron-capture elements: Mo and Ru. Monthly notices of the Royal Astronomical Society, 489(2), 1697-1708. https://doi.org/10.1093/mnras/stz2202

© 2019 The Author(s). We present new observational data for the heavy elements molybdenum (Mo, Z = 42) and ruthenium (Ru, Z = 44) in F-, G-, and K-stars belonging to different substructures of the Milky Way. The range of metallicity covered is -1.0 <... Read More about Enrichment of the Galactic disc with neutron-capture elements: Mo and Ru.

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., Molnár, L., Plachy, E., Szabó, R., Pignatari, M., & Cristallo, S. (2018). The s process in AGB stars as constrained by a large sample of barium stars. Astronomy and Astrophysics, 620, https://doi.org/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 about The s process in AGB stars as constrained by a large sample of barium stars.

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), Article 18. https://doi.org/10.3847/1538-4357/aaa4f7

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 about Role of core-collapse supernovae in explaining Solar System abundances of p nuclides.

The C12(α,γ)O16 reaction and its implications for stellar helium burning (2017)
Journal Article
reaction and its implications for stellar helium burning. Reviews of Modern Physics, 89(3), Article ARTN 035007. https://doi.org/10.1103/revmodphys.89.035007

The creation of carbon and oxygen in our Universe is one of the forefront questions in nuclear astrophysics. The determination of the abundance of these elements is key to our understanding of both the formation of life on Earth and to the life cycle... Read More about The C12(α,γ)O16 reaction and its implications for stellar helium burning.

The neutron capture process in the He shell in core-collapse supernovae: Presolar silicon carbide grains as a diagnostic tool for nuclear astrophysics (2017)
Journal Article
Pignatari, M., Hoppe, P., Trappitsch, R., Fryer, C., Timmes, F., Herwig, F., & Hirschi, R. (2018). The neutron capture process in the He shell in core-collapse supernovae: Presolar silicon carbide grains as a diagnostic tool for nuclear astrophysics. Geochimica et cosmochimica acta, 221, 37-46. https://doi.org/10.1016/j.gca.2017.06.005

Carbon-rich presolar grains are found in primitive meteorites, with isotopic measurements to date suggesting a core-collapse supernovae origin site for some of them. This holds for about 1-2 % of presolar silicon carbide (SiC) grains, so-called Type... Read More about The neutron capture process in the He shell in core-collapse supernovae: Presolar silicon carbide grains as a diagnostic tool for nuclear astrophysics.

Stellar origin of 15N-rich presolar SiC grains of type AB: Supernovae with explosive hydrogen burning (2017)
Journal Article
Liu, N., Nittler, L. R., Pignatari, M., 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. https://doi.org/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 about Stellar origin of 15N-rich presolar SiC grains of type AB: Supernovae with explosive hydrogen burning.

Observing the metal-poor solar neighbourhood: A comparison of galactic chemical evolution predictions (2017)
Journal Article
Mishenina, T., Pignatari, M., Côté, B., Thielemann, F.-K., Soubiran, C., Basak, N., Gorbaneva, T., Korotin, S. A., Kovtyukh, V. V., Wehmeyer, B., Bisterzo, S., Travaglio, C., Gibson, B. K., Jordan, C., Paul, A., Ritter, C., & Herwig, F. (2017). Observing the metal-poor solar neighbourhood: A comparison of galactic chemical evolution predictions. Monthly notices of the Royal Astronomical Society. Letters, 469(4), 4378-4399. https://doi.org/10.1093/mnras/stx1145

© 2017 The Authors. Atmospheric parameters and chemical compositions for 10 stars with metallicities in the region of -2.2 < [Fe/H] < -0.6 were precisely determined using high-resolution, high signal-tonoise, spectra. For each star, the abundance... Read More about Observing the metal-poor solar neighbourhood: A comparison of galactic chemical evolution predictions.

NanoSIMS isotope studies of rare types of presolar silicon carbide grains from the Murchison meteorite: Implications for supernova models and the role of 14C (2017)
Journal Article
Hoppe, P., Pignatari, M., Kodolányi, J., Gröner, E., & Amari, S. (2018). NanoSIMS isotope studies of rare types of presolar silicon carbide grains from the Murchison meteorite: Implications for supernova models and the role of 14C. Geochimica et cosmochimica acta, 221, 182-199. https://doi.org/10.1016/j.gca.2017.01.051

© 2017 Elsevier Ltd. We have conducted a NanoSIMS ion imaging survey of about 1800 presolar silicon carbide (SiC) grains from the Murchison meteorite. A total of 21 supernova (SN) X grains, two SN C grains, and two putative nova grains were identifie... Read More about NanoSIMS isotope studies of rare types of presolar silicon carbide grains from the Murchison meteorite: Implications for supernova models and the role of 14C.