Supernovae
NASA's Fermi Gamma-ray Space Telescope has detected gamma-ray signals from the superluminous supernova SN 2017egm, providing evidence that it was powered by a rapidly spinning magnetar. The discovery marks the first confirmed gamma-ray detection from such an extreme stellar explosion. The findings were published in the journal Astronomy & Astrophysics.
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Astronomers using the XRISM satellite have discovered unusually high amounts of chlorine and potassium in the Cassiopeia A supernova remnant, challenging existing models of element production in stars. These odd-Z elements are vital for planet formation and life, suggesting supernovae play a larger role in distributing life's building blocks. The findings could reshape understanding of chemical distribution in the Milky Way.