.jpg) _(weic2523c).jpg) On the top isJWST image of GRB 250314A while on the bottom is the Artistic Representation of GRB 250314A | |
| Event type | Supernova |
|---|---|
| Type II | |
| Date | 14 March 2025, 12:56:42 UTC |
| Instrument | Space Variable Objects Monitor |
| Constellation | Virgo |
| Right ascension | 13h 25m 12.16s[1] |
| Declination | −05° 16′ 55.10″[1] |
| Epoch | J2000 |
| Redshift | 7.3 |
GRB 250314A is a long-durationgamma-ray burst (GRB) detected detected on 14 March 2025, at aredshift ofz ≈ 7.3, corresponding to approximately 730 million years after theBig Bang. This event is associated with thecore-collapse supernova of amassive star, marking the earliest confirmed supernova explosion observed to date and surpassing the previous record holder atz ≈ 4.3 (1.8 billion years post-Big Bang). GRB 250314A provides critical insights into massive star formation and death during theEpoch of Reionization, a period when the universe's neutral intergalactic medium was ionized by the first galaxies.[2][3][4][5]
The burst was first detected by theSpace Variable Objects Monitor (SVOM)[6][7] satellite and followed up by multiple international observatories, including NASA'sJames Webb Space Telescope (JWST), which confirmed the supernova and imaged the host galaxy, a compact, star-forming system resembling those from the reionization era. The event's properties align with models ofcollapsars, where rapidly rotating massive stars (>20–30M☉) collapse intoblack holes, producing relativistic jets.[4][1][8][9]
GRB 250314A was detected on 14 March 2025, at 12:56:42UTC detected by French-Chinese SVOM satellite.[10]
GRB 250314A offers direct evidence of massive star formation, explosions, and black hole seeding in the early universe, during reionization when the first galaxies ionized the neutral intergalactic medium. The supernova's similarity to modern events challenges predictions of more energetic explosions from metal-poor progenitors, implying collapsar-driven GRBs were producing black holes <1 billion years post-Big Bang.[2]
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