Rogue Planet Gave Itself Away with Warped Light ⚡ экспресс
The microlensing event KMT-2024-BLG-0816 has been detected, indicating a free-floating planet. Observations revealed a finite source effect, a significant blended light contribution, and no signal from a possible host star. This is the first known free-floating planet event with a finite source effect where the blended light remains unresolved. The possibility of using follow-up observations to determine the nature of the blended light—whether it originates from the planet's parent star or has a different origin—is discussed.
The lone planet KMT-2024-BLG-0816, one of many free-floating planets, was discovered when its gravity acted like a magnifying glass for a few hours. Passing in front of a distant star, the invisible body warped space like a glass marble, and boosted the background light. Thanks to a rare coincidence, the planet passed so close to the line of sight that telescopes could observe how the brightness of different parts of the stellar disk changed — the lens slid across its surface.
A faint stray light added to the mystery: it doesn't look like starlight, but could be the ghost of its former host. If confirmed, for the first time a lone planet will be seen together with its parent star — albeit separated by trillions of kilometers. Subsequent brightness measurements in different colors will test this hypothesis.
🎯 Gravitational lensing was predicted by Einstein back in 1936, but he thought it impossible to detect.
🎬 In science fiction, rogue planets are icy worlds holding secrets of ancient civilizations, like in Asimov's novel 'Nemesis'.