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of 129
pro vyhledávání: '"Surman, Rebecca"'
Two heavy elements essential to human biology are thought to have been produced by the astrophysical $r$-process, which occurs in neutron-rich environments: iodine is a constituent of thyroid hormones that affect many physiological processes includin
Externí odkaz:
http://arxiv.org/abs/2402.03593
Autor:
Roederer, Ian U., Vassh, Nicole, Holmbeck, Erika M., Mumpower, Matthew R., Surman, Rebecca, Cowan, John J., Beers, Timothy C., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Placco, Vinicius M., Sakari, Charli M.
Publikováno v:
Science, 382, 1177-1180 (2023)
The heaviest chemical elements are naturally produced by the rapid neutron-capture process (r-process) during neutron star mergers or supernovae. The r-process production of elements heavier than uranium (transuranic nuclei) is poorly understood and
Externí odkaz:
http://arxiv.org/abs/2312.06844
Autor:
Vassh, Nicole, Wang, Xilu, Lariviere, Maude, Sprouse, Trevor, Mumpower, Matthew R., Surman, Rebecca, Liu, Zhenghai, McLaughlin, Gail C., Denissenkov, Pavel, Herwig, Falk
We demonstrate that the well-known 2.6 MeV gamma-ray emission line from thallium-208 could serve as a real-time indicator of astrophysical heavy element production, with both rapid (r) and intermediate (i) neutron capture processes capable of its syn
Externí odkaz:
http://arxiv.org/abs/2311.10895
Publikováno v:
The Astrophysical Journal, 2024, Volume 967, Issue 2, id.146, 20 pp. The Astrophysical Journal, Volume 967, Issue 2, id.146, 20 pp
In high-energy astrophysical processes involving compact objects, such as core-collapse supernovae or binary neutron star mergers, neutrinos play an important role in the synthesis of nuclides. Neutrinos in these environments can experience collectiv
Externí odkaz:
http://arxiv.org/abs/2311.02562
Autor:
Perkins, Haille M. L., Ellis, John, Fields, Brian D., Hartmann, Dieter H., Liu, Zhenghai, McLaughlin, Gail C., Surman, Rebecca, Wang, Xilu
Binary neutron star mergers (BNS) produce high-energy emissions from several physically different sources, including a gamma-ray burst (GRB) and its afterglow, a kilonova, and, at late times, a remnant many parsecs in size. Ionizing radiation from th
Externí odkaz:
http://arxiv.org/abs/2310.11627
Autor:
Wang, Xilu, Surman, Rebecca
Publikováno v:
In: Tanihata, I., Toki, H., Kajino, T. (eds) Handbook of Nuclear Physics . Springer, Singapore (2023)
This chapter discusses three nucleosynthesis processes involved in producing heavy nuclei beyond the iron group that are influenced or shaped by neutrino interactions: the v process, the vp process and the r process. These processes are all related t
Externí odkaz:
http://arxiv.org/abs/2309.06043
Developments in the description of the masses of atomic nuclei have led to various nuclear mass models that provide predictions for masses across the whole chart of nuclides. These mass models play an important role in understanding the synthesis of
Externí odkaz:
http://arxiv.org/abs/2305.01782
Autor:
Shah, Shivani P., Ezzeddine, Rana, Ji, Alexander P., Hansen, Terese, Roederer, Ian U., Catelan, Márcio, Hackshaw, Zoe, Holmbeck, Erika M., Beers, Timothy C., Surman, Rebecca
The ages of the oldest stars shed light on the birth, chemical enrichment, and chemical evolution of the Universe. Nucleocosmochronometry provides an avenue to determining the ages of these stars independent from stellar evolution models. The uranium
Externí odkaz:
http://arxiv.org/abs/2301.11945
Autor:
Roederer, Ian U., Cowan, John J., Pignatari, Marco, Beers, Timothy C., Hartog, Elizabeth A. Den, Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Holmbeck, Erika M., Mumpower, Matthew R., Placco, Vinicius M., Sakari, Charli M., Surman, Rebecca, Vassh, Nicole
Publikováno v:
Astrophysical Journal Vol. 936, p. 84 (2022)
We present new observational benchmarks of rapid neutron-capture process (r-process) nucleosynthesis for elements at and between the first (A ~ 80) and second (A ~ 130) peaks. Our analysis is based on archival ultraviolet and optical spectroscopy of
Externí odkaz:
http://arxiv.org/abs/2210.15105
With the most trans-iron elements detected of any star outside the Solar System, HD 222925 represents the most complete chemical inventory among r-process-enhanced, metal-poor stars. While the abundance pattern of the heaviest elements identified in
Externí odkaz:
http://arxiv.org/abs/2210.10122