All articles tagged with #stellar flares
Astronomers using Cheops and TESS have discovered that the exoplanet HIP 67522 b, which orbits a young, active star, appears to trigger intense stellar flares that erode its wispy atmosphere, potentially leading to its transformation from a Jupiter-sized to a Neptune-sized planet within 100 million years, marking the first evidence of a planet influencing its host star's magnetic activity.
Astronomers have discovered a unique exoplanet, HIP 67522 b, that orbits its young star so closely that it triggers massive stellar flares through magnetic interactions, leading to its own destruction by intense radiation, marking a new phenomenon in star-planet dynamics.
Stellar flares from active stars like red dwarfs can rapidly alter planetary atmospheres, stripping ozone and affecting habitability, but may also contribute to prebiotic chemistry, with effects observable within days to years, including on Earth.
Scientists observed an extreme eruption from a young star, HD 283572, using the Submillimeter Array, indicating that developing exoplanets may face turbulent conditions. The eruption, one of the most powerful stellar flares ever seen, could have significant impacts on the formation of planets in its system. The team is continuing to monitor the star to understand the frequency and effects of such eruptions, and hopes to better understand the physics of these flares and their underlying processes.
A composite image of the Christmas Tree Cluster, created using various wavelengths and telescopes, shows star formation in a festive way. The image includes gas in the optical category, foreground and background stars imaged in the infrared, and actual stars in X-ray wavelengths. The young stars in the cluster undergo variations in brightness due to factors such as rotation, star spots, and magnetic fields. These variations can have consequences for planets forming in the disk surrounding the stars, including partial evaporation and turbulence that may prevent rapid inward migration. The Christmas Tree Cluster is part of NGC 2264 and is located 2,500 light-years from Earth.
Astronomers have observed the Neptune-sized planet AU Microscopii b losing its atmosphere in a highly variable and unpredictable manner due to the intense flaring activity of its young red dwarf star. The planet's hydrogen atmosphere is being torn away in fits and starts, with periods of significant loss followed by minimal loss. This unusual behavior raises questions about the survivability and habitability of planets close to red dwarfs. Further observations are needed to understand the mechanisms behind this atmospheric loss and its implications for exoplanet compositions and potential habitability.
Astronomers have observed the Neptune-sized planet AU Microscopii b losing its atmosphere in a highly variable and unpredictable manner due to the intense flaring activity of its young red dwarf star. The planet's hydrogen atmosphere is being torn away in fits and starts, with periods of significant loss followed by minimal loss. This unusual behavior raises questions about the survivability and habitability of planets close to red dwarfs. Further observations are needed to understand the mechanisms behind this atmospheric loss and its implications for exoplanet compositions and habitability.
The Hubble Space Telescope has observed an evaporating planet, AU Microscopii b, orbiting a red dwarf star. The planet's hydrogen atmosphere is being stripped off due to the star's intense magnetic fields and blistering ultraviolet radiation. The observations revealed unexpected variability in the planet's atmospheric loss, with one orbit showing no material loss and another orbit showing clear signs of atmospheric escape. This variability challenges current models of planetary evolution and highlights the extreme conditions experienced by planets orbiting red dwarf stars. Further observations will help scientists understand the complex interplay between the star and the planet and the potential habitability of such systems.