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Showing results for tags 'supernova'.
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Exploding stars may have caused mass extinction on Earth, study shows, University of Illinois at Urbana-Champaign, August 18, 2020 "Killer cosmic rays from nearby supernovae could be the culprit behind at least one mass extinction event, researchers said, and finding certain radioactive isotopes in Earth's rock record could confirm this scenario." The open access paper is: Brian D. Fields, Adrian L. Melott, John Ellis, Adrienne F. Ertel, Brian J. Fry, Bruce S. Lieberman, Zhenghai Liu, Jesse A. Miller, Brian C. Thomas. Supernova triggers for end-Devonian extinctions. Proceedings of the National Academy of Sciences, 2020; 202013774 Yours Paul H.
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Water Could Have Drowned the Earth If Not for Ancient Supernova
Oxytropidoceras posted a topic in Rocks & Minerals
Water Could Have Drowned the Earth If Not for Ancient Supernova By Charles Q. Choi, Space_Com, February 12, 2019 https://www.space.com/supernova-explosion-earth-water-world.html The paper is; Lichtenberg, T., Golabek, G.J., Burn, R., Meyer, M.R., Alibert, Y., Gerya, T.V., and Mordasini, C., 2019, A water budget dichotomy of rocky protoplanets from 26Al-heating. Nature Astronomy. volume 3, pages 307–313. https://www.researchgate.net/publication/331029418_A_water_budget_dichotomy_of_rocky_protoplanets_from_26Al-heating https://arxiv.org/pdf/1902.04026 https://www.researchgate.net/profile/Tim_Lichtenberg https://www.nature.com/articles/s41550-018-0688-5 Yours, Paul H.-
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Did a Supernova Kill Off Megalodon 2.5 Million Years Ago?
Oxytropidoceras posted a topic in Fossil News
Megalodon may have been killed off by Supernova radiation, Hannah Osborne, Newsweek, December 13, 2018 https://www.newsweek.com/megalodon-extinct-shark-supernova-cosmic-ray-cancer-mutations-1256980 Massive supernova explosion may have wiped out giant prehistoric sharks, scientists say. Megalodon may have been among creatures driven to extinction after cosmic particles drove up cancer rates, new study claims The Independent, Josh Gabbatiss, December 2018 https://www.independent.co.uk/news/science/supernova-stars-explosion-giant-sharks-prehistoric-megalodon-extinction-science-a8679636.html The paper is: Adrian L. Melott, Franciole Marinho, and Laura Paulucci 2018, Hypothesis: Muon Radiation Dose and Marine Megafaunal Extinction at the End-Pliocene Supernova. Astrobiology, Published Online, November 27, 2018 https://doi.org/10.1089/ast.2018.1902 and at Muon Radiation Dose and Marine Megafaunal Extinction at the end-Pliocene Supernova Adrian L. Melott (Kansas), Franciole Marinho, Laura Paulucci (Submitted on 26 Dec 2017 (v1), last revised 17 Oct 2018 (this version, v2)) https://arxiv.org/pdf/1712.09367.pdf https://arxiv.org/abs/1712.09367 Yours, Paul H.- 3 replies
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Near-Earth Supernova Explosions (When Stars Attack! ) In Search of Near-Earth Supernova Explosions Brian Fields, KU Physics & Astronomy Public Talks, Published on Apr 20, 2016 https://www.youtube.com/watch?v=ND6u4Rnq0g0 Related papers are: Breitschwerdt, D., Feige, J., Schulreich, M.M., de Avillez, M.A., Dettbarn, C. and Fuchs, B., 2016. The locations of recent supernovae near the Sun from modelling 60 Fe transport. Nature, 532(7597), p. 73-78. https://www.earth.northwestern.edu/people/seth/351/breitschwerdt.pdf https://www.nature.com/articles/nature17424 Fields, B.D. and Ellis, J., 1999. On deep-ocean 60Fe as a fossil of a near-earth supernova. New Astronomy, 4(6), pp. 419-430. https://arxiv.org/pdf/astro-ph/9811457.pdf https://www.sciencedirect.com/science/article/pii/S1384107699000342 Fry, B.J., Fields, B.D. and Ellis, J.R., 2015. Astrophysical shrapnel: Discriminating among near-earth stellar explosion sources of live radioactive isotopes. The Astrophysical Journal, 800(1), 17 pp. https://arxiv.org/pdf/1405.4310.pdf http://iopscience.iop.org/article/10.1088/0004-637X/800/1/71/meta Wallner, A., Feige, J., Kinoshita, N., Paul, M., Fifield, L.K., Golser, R., Honda, M., Linnemann, U., Matsuzaki, H., Merchel, S. and Rugel, G., 2016. Recent near- Earth supernovae probed by global deposition of interstellar radioactive 60 Fe. Nature, 532(7597), pp. 69-72. Yours, Paul H.
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