Speaker
Description
Coronal mass ejections (CMEs) are a dominant contributor to space weather in the Solar System, with the potential to erode planetary atmospheres. While traditional stellar activity indicators, such as flares, do not confirm the presence of a CME, Solar studies have established that Type II radio bursts provide a direct signature of CME-driven shocks. However, despite extensive searches, no unequivocal detection of an extrasolar Type II burst has been made, until now.
In this talk I will present 140 star-years of observational stellar data from the Low-Frequency Array Two Metre Sky Survey. In particular, I will present the first two extrasolar analogues of a Solar Type II burst that signals the presence of a CME. I will detail how such a detection fits within the Solar paradigm, and its implications for how common such events are on stars other than our Sun. At the end, I will outline a search for extrasolar (so-called) type-III bursts that trace energetic particle events.
| Talk category | NOVA Network 2 |
|---|---|
| Preference for a talk or poster | Talk |
| Talk preference for PhD students | 2nd year |
