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The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova? (2014)
Journal Article
Jones, S., Hirschi, R., & Nomoto, K. (2014). The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova?. Astrophysical Journal, 797(2), 83. https://doi.org/10.1088/0004-637X/797/2/83

In the ONeMg cores of $8.8-9.5~{\rm M}_\odot$ stars, neon and oxygen burning is ignited off-center. Whether the neon-oxygen flame propagates to the center is critical to determine whether these stars undergo Fe core collapse or electron capture induc... Read More about The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova?.

Pair-instability supernovae in the local universe (2014)
Journal Article
Whalen, D. J., Smidt, J., Heger, A., Hirschi, R., Yusof, N., Even, W., …Joggerst, C. C. (2014). Pair-instability supernovae in the local universe. Astrophysical Journal, 797(1), Article 9. https://doi.org/10.1088/0004-637X/797/1/9

The discovery of 150-300 M ? stars in the Local Group and pair-instability supernova candidates at low redshifts has excited interest in this exotic explosion mechanism. Realistic light curves for pair-instability supernovae at near-solar metalliciti... Read More about Pair-instability supernovae in the local universe.

High-resolution abundance analysis of red giants in the globular cluster NGC 6522 (2014)
Journal Article
Barbuy, B., Chiappini, C., Cantelli, E., Depagne, E., Pignatari, M., Hirschi, R., …Gómez, A. (2014). High-resolution abundance analysis of red giants in the globular cluster NGC 6522. Astronomy & Astrophysics, 570, A76. https://doi.org/10.1051/0004-6361/201424311

Context. The [Sr/Ba] and [Y/Ba] scatter observed in some galactic halo stars that are very metal-poor and in a few individual stars of the oldest known Milky Way globular cluster NGC 6522 have been interpreted as evidence of early enrichment by massi... Read More about High-resolution abundance analysis of red giants in the globular cluster NGC 6522.

The s-process enrichment of the globular clusters M4 and M22 (2014)
Journal Article
Hirschi. (2014). The s-process enrichment of the globular clusters M4 and M22. Astrophysical Journal, https://doi.org/10.1088/0004-637X/795/1/34

We investigate the enrichment in elements produced by the slow neutron-capture process (s-process) in the globular clusters M4 (NGC 6121) and M22 (NGC 6656). Stars in M4 have homogeneous abundances of Fe and neutron-capture elements, but the entire c... Read More about The s-process enrichment of the globular clusters M4 and M22.

Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa (2014)
Presentation / Conference
Rauscher, T., Travaglio, C., Gallino, R., Nishimura, N., & Hirschi, R. (2014, July). Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa. Paper presented at 13th Symposium on Nuclei in the Cosmos (NIC XIII), Debrecen, Hungary

The knowledge of the production of extinct radioactivities like 92Nb and 146Sm by photodisintegration processes in ccSN and SNIa models is essential for interpreting abundances in meteoritic material and for Galactic Chemical Evolution (GCE). The 92M... Read More about Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa.

Electron Capture and Beta-Decay Rates for the Collapse of O+Ne+Mg Cores (2014)
Journal Article
Hua Lam, Y., Martínez-Pinedo, G., Langanke, K., Jones, S., Hirschi, R., Zegers, R. G. T., & Alex Brown, B. (2014). Electron Capture and Beta-Decay Rates for the Collapse of O+Ne+Mg Cores. EPJ Web of Conferences, 66, Article 07011. https://doi.org/10.1051/epjconf/20146607011

We present a new set of electron (e−) capture and β-decay rates that improves previous calculations by Takahara et al. and Oda et al. by: (a) incorporation of recent charge-exchange and β-decay data, (b) contributions of forbidden transitions, and (c... Read More about Electron Capture and Beta-Decay Rates for the Collapse of O+Ne+Mg Cores.

Evolution and Nucleosynthesis of Very Massive Stars (2014)
Book Chapter
Hirschi, R. (2014). Evolution and Nucleosynthesis of Very Massive Stars. In Very Massive Stars in the Local Universe (157-198). (1). Springer. https://doi.org/10.1007/978-3-319-09596-7_6

In this chapter, after a brief introduction and overview of stellar evolution, we discuss the evolution and nucleosynthesis of very massive stars (VMS: M>100 solar masses) in the context of recent stellar evolution model calculations. This chapter co... Read More about Evolution and Nucleosynthesis of Very Massive Stars.