Black Holes
Rogue black hole produces fastest radio signals outside galaxy center
Astronomers have observed a black hole tearing apart a star far from its galaxy's center, producing the fastest-changing radio signals ever recorded from such an event. Named AT 2024tvd, this tidal disruption event reveals supermassive black holes can exist and remain active in unexpected locations. The discovery, led by an international team, suggests complex, delayed energy releases from black holes.
Virtual telescope uncovers jet in galaxy OJ 287
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An international team of astronomers has captured the most detailed image yet of the core of the distant galaxy OJ 287, revealing a sharply curved plasma jet. The observation, made using a virtual telescope spanning multiple Earth diameters, supports the presence of two merging supermassive black holes at its heart. This breakthrough provides new insights into the extreme energies and structures around such cosmic phenomena.
Tiny nearby galaxy hosts massive black hole
A small satellite galaxy of the Milky Way, known as Segue 1, contains a supermassive black hole far larger than expected for its size. This discovery challenges long-held assumptions that such dwarf galaxies are primarily held together by dark matter. Researchers used computer models to reveal the black hole's presence at the galaxy's center.
Twin black hole mergers test Einstein's general relativity
Two black hole collisions detected in late 2024 have provided unprecedented tests of Einstein's general theory of relativity. The events, captured by the LIGO-Virgo-KAGRA Collaboration, revealed unusual spins and possible second-generation black holes. These detections confirm theoretical predictions with high precision and probe for new particles.