Mysterious X-ray Signal Discovered by Einstein Probe Sparks Astronomical Debate

CNChina|

The Chinese Academy of Sciences' Einstein Probe has detected an unusual X-ray event, designated EP240408a, during its commissioning phase, raising questions among astronomers about its origin and classification. Launched on January 9, 2024, the probe identified this celestial phenomenon as part of its observations of strong transient objects, detecting over 60 powerful signals and nearly 500 stellar flares, as reported by principal investigator Yuan Weimin to China Central Television.

Initial analysis suggests that EP240408a may be a tidal disruption event, which occurs when a star nears a black hole, leading to its destruction. However, the event's characteristics do not fit neatly into known classifications of transient phenomena, with some researchers proposing it could represent a new type of astronomical event. The signal emitted for an unusual duration of 7 to 23 days, much longer than conventional fast X-ray bursts, prompting further investigations with various telescopes.

As discoveries continue, scientists hope the Einstein Probe will identify similar events, widening the understanding of high-energy astrophysical processes. "This could enhance our comprehension of the diverse and dynamic processes in the universe," noted Francesco Zelati from the Institute of Space Sciences.

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