List, "A team led by Doris Arzoumanian at the National Astronomical Observatory of Japan proposed a new explanation of how the Solar System acquired the amount of isotopes measured in meteorites while surviving the supernova shock. Stars form in large groups called clusters inside giant clouds of molecular gas. These molecular clouds are filamentary. Small stars like the Sun usually form along the filaments and large stars, which will explode in a supernova, usually form at the hubs where multiple filaments cross." https://www.nao.ac.jp/en/news/science/2023/20230622-dos.html
Arzoumanian et al. “Insights on the Sun Birth Environment in the Context of Star Cluster Formation in Hub–Filament Systems” in the Astrophysical Journal Letters on April 25, 2023. https://iopscience.iop.org/article/10.3847/2041-8213/acc849 ..."The oldest of these primitive condensates are the calcium–aluminum-rich Inclusions (CAIs) believed to have formed in the protoplanetary disk during the earliest evolutionary time of the solar system (e.g., Amelin et al. 2002). Isotopic studies of CAIs found in meteorites show the presence of several short-lived radionuclides (SLRs) such as 26Al that provides constraints on the formation timescales and processes of the CAIs and on the amount and timescale of newly injected material as a result of feedback from neighboring high-mass stars (e.g., Scott 2007; Adams 2010; Boss 2012)."... Best, Dirk Ross...Tokyo ______________________________________________ Meteorite-list mailing list [email protected] https://pairlist2.pair.net/mailman/listinfo/meteorite-list
