ELFT HÍRADÓ

[vidakris AT konkoly.hu]

Szemináriumi meghívó / Invitation to a seminar
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CSFK CSI SZEMINÁRIUM / KONKOLY OBSERVATORY SEMINAR

Date: Feb 05 (Thursday) 14:00


David Konijn (ASTRON, Netherlands)
Radio Burst from a Stellar Coronal Mass Ejection

Coronal mass ejections (CMEs) are massive expulsions of magnetised plasma 
from a star, and are the largest contributors to space weather in the Solar 
System. CMEs are theorised to play a key role in planetary atmospheric 
erosion, especially for planets that are close to their host star. However, 
such a conclusion remains controversial, as there has not been an unambiguous 
detection of a CME from a star other than our Sun. Previous stellar CME 
studies have only inferred the presence of a CME through the detection of 
other types of stellar eruptive events. A signature of a fast CME is a Type 
II radio burst, which is emitted from the shock wave produced as the CME 
travels through the stellar corona into interplanetary space. In this 
seminar, I will show an analogue to a Type II burst from an early M dwarf, 
demonstrate how such a detection fits within the Solar paradigm and show its 
implications for the frequency of such events on stars other than our Sun. 
Our detection implies that we a
 re no longer restricted to extrapolating the solar CME kinematics and rates 
to other stars, allowing us to establish the first observational limits on 
the impact of CMEs on exoplanets!

https://konkoly.hu/k-szeminariumok

The seminar will be held live in the Detre hall with audience, but also 
streamed online via Zoom. If you are unable to attend the presentation in 
person, you can join us via this link
https://us06web.zoom.us/j/82806911982?pwd=SVZpT0syQ1J6dHBvSkF4N2dXNEQ0dz09
or the meeting ID: 828 0691 1982 and passcode: 206265



Everyone is welcome!

Krisztián Vida, Mina Ghodsi
organizers
https://konkoly.hu/k-szeminariumok