Dr. Diana Morosan
University of Helsinki, Finlad
The nature and origin of radio emission and accelerated particles during solar eruptions
Abstract : Flares and coronal mass ejections (CMEs) from the Sun are the most powerful and spectacular explosions in the solar system, capable of releasing vast amounts of magnetic energy over relatively short periods of time. These phenomena are often associated with particle acceleration processes that are often observed directly by spacecraft here at Earth. At the Sun, there are no direct methods of measuring these particles, which is necessary to predict their origin and propagation direction through the heliosphere. However, accelerated particles, in particular fast electrons, can generate emission at radio wavelengths through various mechanisms. Here, we exploit radio observations of various types of radio bursts that accompany CME eruptions on the Sun, in particular radio bursts that show movement with the CME expansion in the low solar corona. Using multi-wavelength analysis, reconstruction of the radio emission and CME in three dimensions, we aim to determine the sources and locations of particle acceleration during these eruptions. Such studies are important to understand CMEs and their potential space weather impacts to ultimately improve the lead time to these impacts here at Earth.
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Posted: 20th November 2019 by Simon Purser
2019-11-26, 12:00: Dr. D. Morosan (University of Helsinki, Finland)
Dr. Diana Morosan
University of Helsinki, Finlad
The nature and origin of radio emission and accelerated particles during solar eruptions
Abstract : Flares and coronal mass ejections (CMEs) from the Sun are the most powerful and spectacular explosions in the solar system, capable of releasing vast amounts of magnetic energy over relatively short periods of time. These phenomena are often associated with particle acceleration processes that are often observed directly by spacecraft here at Earth. At the Sun, there are no direct methods of measuring these particles, which is necessary to predict their origin and propagation direction through the heliosphere. However, accelerated particles, in particular fast electrons, can generate emission at radio wavelengths through various mechanisms. Here, we exploit radio observations of various types of radio bursts that accompany CME eruptions on the Sun, in particular radio bursts that show movement with the CME expansion in the low solar corona. Using multi-wavelength analysis, reconstruction of the radio emission and CME in three dimensions, we aim to determine the sources and locations of particle acceleration during these eruptions. Such studies are important to understand CMEs and their potential space weather impacts to ultimately improve the lead time to these impacts here at Earth.
Category: Future Seminars, Seminars
The Theroretical Physics theme for the 80th anniversary is "Quantum, Inifinity and Beyond" The events will tie in the main research topics of the School and draw on its rich history. More on DIAS 2020 can be found here: dias.ie/dias2020/
DIAS School of Theoretical Physics is one of the two founding Schools. It's first Director was the renowned Physicist Erwin Schrödinger, and the School can boast a number of other big names in Irish and International physics and mathematics. #DIASdiscovers
DIAS & @esa Solar Orbiter. Professor Peter Gallagher and Dr Shane Maloney worked on the recently launched space mission. dias.ie/2020/02/11/dia… #DIASdiscovers #WeAreAllSolarOrbiters #SolarOrbiter
On 5th February 1943, Nobel Prize-winning physicist, Prof Erwin Schrödinger, then Director of Theoretical Physics at DIAS, delivered the first of his renowned ‘What is Life?’ lectures. He delivered further lectures in his ‘What is Life?’ series over the following month.
@petertgallagher will be on @PatKennyNT at 11.20 talking about the @esa #SolarOrbiter launch that took place at 4.03 yesterday morning from Cape Canaveral. ☀️🛰️ Listen now: newstalk.com #DIASdiscovers
Big Thank you to @hfalcke, for our School of Cosmic Physics Statutory Public Lecture on "The first image of a Black Hole" yesterday evening. Here he is pictured with @TomRayDIAS in @ucddublin #DIASdiscovers
ICYMI: DIAS SCIENTISTS DISCOVER DISAPPEARANCE OF LARGE PARTS OF TECTONIC PLATE BENEATH AFRICA researchandinnovation.ie/dias-scientist… #DIASdiscovers
Tickets still available for our Statutory Public Lecture this evening by @hfalcke: “The First Image of a Black Hole” More here➡️eventbrite.ie/e/dias-scp-sta… Tickets are free! #DIASdiscovers #blackhole