Telescópio Fermi detecta raios gama de supernova superluminosa

O Telescópio Espacial de Raios Gama Fermi, da NASA, detectou sinais de raios gama da supernova superluminosa SN 2017egm, fornecendo evidências de que ela foi impulsionada por um magnetar em rápida rotação. A descoberta marca a primeira detecção confirmada de raios gama proveniente de uma explosão estelar tão extrema. As conclusões foram publicadas na revista Astronomy & Astrophysics.

A supernova entrou em erupção na galáxia NGC 3191, localizada a cerca de 440 milhões de anos-luz de distância, na constelação de Ursa Major. É uma das supernovas superluminosas mais próximas observadas a partir da Terra. Os pesquisadores analisaram anos de dados do Fermi e descobriram que, entre seis candidatos próximos, apenas a SN 2017egm apresentou evidências claras de raios gama.

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