Why GRB 250702B Burned for 7 Hours (The Impossible Explosion)

Описание: On July 2, 2025, detectors on Earth picked up a cosmic scream that shouldn't exist. Standard Gamma-Ray Bursts last milliseconds or minutes—this one roared for seven hours straight, releasing the energy of 1,000 suns over their entire lifetimes. It was too fast to be a supermassive black hole, but too long to be a dying star. So, what was it?

The Science:
In this episode, we dissect the mystery of GRB 250702B. By combining data from Fermi, Swift, NuSTAR, and the James Webb Space Telescope (JWST), astrophysicists ruled out standard supernovae and Tidal Disruption Events. Instead, they uncovered a rare phenomenon: Celestial Cannibalism. We explore the "Helium Merger Model," where a stellar-mass black hole plunges into the core of a companion helium star, eating it from the inside out. This creates a unique "unwinding drive belt" of angular momentum, allowing a tiny engine to sustain a massive, day-long jet of ultra-relativistic energy.

Why It Matters:
This discovery fundamentally rewrites our understanding of stellar death. It proves that the universe has violent mechanisms for powering black holes that we have been missing for decades because our telescopes weren't looking for the quiet "precursor" signals days before the main event.

Keywords:
Gamma-Ray Burst, GRB 250702B, Black Hole Physics, Astrophysics, JWST, James Webb Space Telescope, NuSTAR, Fermi Gamma-ray Space Telescope, Tidal Disruption Event, Supernova, Stellar Evolution, Helium Star, Neutron Star Merger, High Energy Physics, Space Documentary, Narrative Labs.

C. Timestamps / Chapters

00:00 – The Impossible Event: A 7-Hour Gamma-Ray Burst

04:15 – The Paradox: Too Fast to be Big, Too Long to be Small

09:30 – The Location: Piercing the Dust with JWST

13:10 – Ruling Out the Usual Suspects (TDEs and Collapsars)

17:20 – The Solution: The Helium Merger Model

20:00 – The "Drive Belt" Mechanism: How to Fuel an Engine for Days

24:15 – The Missing Supernova & The "Common Envelope" Phase

27:40 – The Precursor: Why We Need to Watch the X-Ray Sky

29:15 – Conclusion: A New Era of Cosmic Cannibalism

Hashtags

#Astrophysics #BlackHoles #GRB #JWST #SpaceMystery #NarrativeLabs