The Law of Unified Cooling: What Links Blazars and Gamma-Ray Bursts ⚡ экспресс
Blazars (steady jets from galaxy centers) and gamma-ray bursts (explosions of massive stars) emit radiation whose shape is described by a 'log-parabola'. It turns out that this shape is naturally produced by the cooling of relativistic electrons in a decreasing magnetic field—like a cooling light bulb filament changes color. Previously this was shown for gamma-ray bursts, and now for blazars. This means that it's cooling, not particle acceleration, that determines the observed spectrum—contrary to conventional wisdom. This could explain the mysterious link between jet powers in such different objects.
Blazars are long-lasting beams from black holes at the centers of galaxies. Gamma-ray bursts are the briefest flashes from supernova explosions or neutron star mergers. The former act like eternal spotlights, the latter like camera flashes. Yet their light fades following the same law — the law of rapid cooling.
Inside the jets ejected by these objects, electrons whirl around. They are tied to the magnetic field: as the field weakens, the particles abruptly shed energy, emitting light. This is how the glow is produced. Its curve — how brightness is distributed across colors — is remarkably similar for both phenomena. It's like cooling metal: whether it's a massive ingot or a thin wire, heat escapes along the same trajectory, losing degrees ever more slowly.
The key discovery is that cooling turned out to be more important than acceleration. It is cooling that creates the universal shape of the spectrum — a smooth curve, like a sledding hill. And it's the same from micro to mega scales. Blazars and gamma-ray bursts, it turns out, aren't so different after all — they're just sources of the same law, of different calibers.
🎯 A typical gamma-ray burst releases as much energy in a few seconds as our Sun will emit over its entire 10-billion-year lifetime.