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Termination shocks in reconnection outflow jets: observations and simulations & A brief status report on STIX and Solar Orbiter & ......

  Speaker: Alexander Warmuth (AIP, Germany)  

  Title: Termination shocks in reconnection outflow jets: observations and simulations  

  Abstract: The existence of fast-mode termination shocks in reconnection outflow jets has been predicted by theory and supported by the observation of stationary type II - like radio sources in the decimetric-metric regime. These classical observations will be reviewed and then compared to more recent microwave observations of a possible termination shock. The emphasis will be on how the observations can be used to constrain the shock parameters. Then, recent results from UV spectroscopy and imaging that could be attributed to termination shocks will be set into the context. The various observational characteristics will then be compared to the results of stat-of- the-art numerical simulations. Finally, the possible role of termination shocks for particle acceleration will be discussed. 

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  Speaker: Alexander Warmuth (AIP, Germany)  

  Title: A brief status report on STIX and Solar Orbiter  

  Abstract: I will briefly introduce the STIX instrument (Spectrometer/Telescope for Imaging X-rays) in the context of the Solar Orbiter mission and give a status report on both the instrument and the mission.  

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  Speaker: Malte Brose(AIP, Germany)  

  Title: A Study of the Temperature Evolution in Solar Flares using Differential Emission Measure (DEM) Reconstruction Techniques  

  Abstract: In this project we study the temperature evolution in a limb flare event by using data recorded by SDO. Differential emission measure (DEM) reconstruction techniques are applied to derive the spatially resolved emission measure (EM) and temperature maps from sets of EUV images (AIA). During dynamic heating and cooling processes in solar flares, the EM in different temperature bins change over time. One of the project's key objectives is to investigate the thermal evolution of plasma located above post-flare loops in general and supra-arcade downflows (SADs) in particular.

  Date & Time: 2019-11-27 (Wednesday) 09:30—12:00  

  Place: 3-302 room in Purple Mountain Observatory

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