The era of gravitational wave astronomy has dawned, allowing us not only to observe the universe but also to "listen" to it through gravitational waves. When a compact object ventures too close to a supermassive black hole, it becomes captured due to the emission of gravitational waves, eventually being swallowed whole as it crosses the event

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Fast X-ray Transients (FXTs) are minute-to-hours long flashes of X-rays, first discovered serendipitously in X-ray satellite data (mainly Chandra and XMM-Newton). They are proven to be caused by energetic extra-galactic phenomena. Currently, Einstein Probe is revolutionizing the field by discovering many FXTs and, crucially, by their low-latency

MHD waves – slow, Alfvén and fast – lose their distinctiveness in certain regions of a stratified plasma, such as solar or stellar atmospheres. We discuss all three mode conversion processes, fast/slow, fast/Alfvén and slow/Alfvén and how they are affected by atmospheric structure, magnetic field orientation, and partial ionization. We also present

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