Speaker
Liyi Gu
(SRON)
Description
In this talk I will report an exciting discovery from the 2024 X-ray/UV campaign on NGC 3783 led by XRISM: a transient ultra‑fast outflow (UFO) detected with the Resolve instrument, reaching 0.19c and occurring in tight temporal coincidence with the rapid decay of a powerful soft X‑ray/UV flare. The absorption line points to a compact, high‑ionization absorber and suggest a violent ejection event. Tentative and variable absorption lines seen with an increasing velocity further hint at an evolving wind during the X-ray flare. I will further explore implications for magnetic-driven disk‑wind launching in active galactic nuclei based on the observed similarities between the UFO and the solar coronal mass ejections.
Author
Liyi Gu
(SRON)
Co-author
Prof.
Jelle Kaastra
(SRON)