Overview
- A Nature Astronomy study led by Kyoto University reports the first direct multi-temperature coronal mass ejection from EK Draconis, a young solar analogue.
- Hubble detected ~100,000 K plasma moving at 300–550 km/s, followed roughly 10 minutes later by ~10,000 K material at about 70 km/s seen in Hα.
- The hot component carried far more energy than the cool phase, indicating potential for shocks and energetic particles that could alter early planetary atmospheres.
- The event was captured through coordinated ultraviolet observations with NASA’s Hubble Space Telescope and simultaneous Hα spectroscopy from telescopes in Japan and Korea.
- Complementary arXiv preprints from a five-year optical campaign find a lower-limit ~27% CME–superflare association and preliminary mass-loss estimates for EK Draconis, with population-level rates still being refined.