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XRISM unlocks century-old mystery of gamma-Cas by revealing a hidden white dwarf companion

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Source: Space
XRISM unlocks century-old mystery of gamma-Cas by revealing a hidden white dwarf companion
Photo: Space
TL;DR

Astronomers using the XRISM X-ray observatory have shown that the Be-star gamma-Cas is being slowly fed by a compact companion, likely a white dwarf, explaining its unusual X-ray emissions and solving a long-standing mystery about this nearby star.

Topics:sciencespace#be-stars#gamma-cas#space#white-dwarf#x-ray-astronomy#xrism
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  1. Scientists finally solve century-old mystery of star with unexpected X-ray emissions  Space
  2. 50-Year-Old Mystery Solved As Secret White Dwarf Found To Be Source Of X-Rays In Gamma Cassiopeia  IFLScience
  3. XRISM identifies gamma Cas X-ray origin, solving a 50-year-old stellar mystery  Phys.org
  4. Astronomers Identify Origin of Mysterious Deep-Space X-Rays Directed Toward Earth  The Debrief
  5. Giant Star's Mysterious X-Rays Finally Explained After 50 Years  ScienceAlert

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