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Heliophysics Journal Club
Tuesday Feb 23, 14.30
Bi-weekly discussion group on topics in heliophysics and astroinformatics.
This time, we will discuss the paper FOXSI-2 Solar Microflares II: Hard X-ray Imaging Spectroscopy and Flare Energetics.
Interested in joining us? Welcome!
Papers discussed before
Fridays 17.00 on Zoom!
at the Institute for Data Science, now on Zoom.
Yes, many of us were still here at this time ☺︎
A tradition we inherited from the Berkeley Space Sciences Lab.
Everybody is welcome!
STIX – voyage to the sun
2020 Jan 22 – Feb 28 Lichtistallation auf dem Campusplatz Windisch
anlässlich des Starts der Raumsonde Solar Orbiter
Künstler: Stephan Athanas und Michael Omlin
Wir bedanken uns bei den folgenden Institutionen für die Unterstützung
Conferences and Meetings
The Swiss heliophysics community and some reknowned international experts shared current and upcoming topics in heliophysics. Due to Covid-19 the workshop, organized by Marina Battaglia, took place online rather than at FHNW Windisch.
2020 October 9, General Assembly of the Swiss Society of Astrophysics and Astronomy SSAA
Talk by André Csillaghy ‘Data science and astronomy, two deeply connected domains’
Results from ongoing analysis and interpretation of archival RHESSI data and coordinated observations of high-energy solar eruptive events using instruments/facilities such as EOVSA, NuSTAR, PSP, Fermi, and MinXSS. Sessions on preparing for future missions such as STIX/Solar Orbiter and FIERCE.
2019 July 5, Investigating the two extremes of solar activity using data from the Murchison Widefield Array, Special Seminar with Surajit Mondal, National Centre for Radio Astrophysics (NCRA), Pune, India
The solar activity is of two types: one when the sun is very active and gives rise to many flares and coronal mass ejections (CMEs) and other when the sun is very quiet and there is no X-ray flare for several days. Using data from the MWA, we have investigated a CME event and a quiet sun. We have been able to detect gyro-synchrotron emission from the CME and have successfully modelled the emission. Using the model, we have estimated different plasma parameters in a spatially resolved manner at different times. In this talk, I will discuss the details of the fitting procedure and how we succeeded in detecting the emission even after 2 hours after the initial eruption and at a height of ~4.7 solar radius. In the second part of my talk, I will focus on the coronal heating problem. I will give the first direct and robust observational evidence, to the best of our knowledge, that Hudson’s criterion is satisfied even in the case of quiet sun. Several other predictions of the nanoflare hypothesis are also found to be valid in this case. All these works have been possible with the automated high dynamic range imaging routine we have developed. I will also talk about this briefly. If time permits I will also briefly discuss the various other works which are happening in our group.
Current developments in Switzerland: fundamental solar physics, solar variability, Sun-Earth relations in proxies, observations, and model simulations, future (space) missions/observations.
More than 80 participants from the SKA organization, government agencies, universities and the Swiss industry participated at the 3rd Swiss SKA Days organized by EPFL and I4DS at the FHNW Brugg-Windisch Campus.
Heliophysics Journal Club 2021
February 9, IRIS Observations of the Low-atmosphere Counterparts of Active Region Outflows
January 12, Solar X-ray Monitor On Board the Chandrayaan-2 Orbiter: In-flight Performance and Science Prospects
January 26, Flare Expansion to a Magnetic Rope Accompanied by Rare Radio Bursts
Papers discussed before 2021
December 15, Electron Acceleration from Expanding Magnetic Vortices During Reconnection with a Guide Field December 1, An Explanation of Remarkable Emission-line Profiles in Post-flare Coronal Rain November 17, Periodicities in an active region correlated with Type III radio bursts observed by Parker Solar Probe October 20, Accelerated Electrons Observed Down to <7 keV in a NuSTAR Solar Microflare October 6, Global maps of the magnetic field in the solar corona September 22, Radio Echo in the Turbulent Corona and Simulations of Solar Drift-pair Radio Bursts September 8, Spectral Characteristics and Formation Height of Off-limb Flare Ribbons August 25, Can the Superposition of Evaporative Flows Explain Broad Fe XXI Profiles during Solar Flares? August 11, Loss-cone instability modulation due to a magnetohydrodynamic sausage mode oscillation in the solar corona June 16, The Sun is less active than other solar-like stars June 2, Relating Streamer Flows to Density and Magnetic Structures at the Parker Solar Probe May 19, Relating Streamer Flows to Density and Magnetic Structures at the Parker Solar Probe May 5, Density Fluctuations in the Solar Wind Based on Type III Radio Bursts Observed by Parker Solar Probe April 21, Spectral signatures of chromospheric condensation in a major solar flare April 7, Solar Flare Distributions: Lognormal Instead of Power Law? March 24, Extreme Ultraviolet Observations and Analysis of Micro-Eruptions and their associated Coronal Waves March 10, Hard X-Ray Observations of a Jet and Accelerated Electrons in the Corona February 11, Observations of Jetlet-like Events at Edges of Solar Magnetic Network Lanes January 28, STIX instrument paper January 14, Dark Jets in Solar Coronal Holes
November 5, Search window of solar flare neutrinos
September 10, Visualizing Data using t-SNE
February 12, Mapping the magnetic field of flare coronal loops
February 26, The Formation of IRIS Diagnostics
January 15, Solar Physics with the Square Kilometer Array
September 25, Presentation by Rohit Sharma about his PHD work
August 14, Presentation by Matej Kuhar about his PHD work
August 7, Presentation by Säm Krucker about his recent work in Japan
Talks & Public Engagement
2020 January 24, Science Café mit Säm Krucker, Raumschiff – Werkstatt für Astronomie, Dübendorf
2019 July 18, Vortrag und Virtual Reality-Erlebnis im Raumschiff: André Csillaghy stellte einer Männervereinigung die Sonnenforschung an der FHNW und das Röntgenteleskop STIX vor. Danach probierten alle die von FHNW-Studierenden entwickelte VR-App ‘Floating in Space’ aus.
2019 April 9, FHNW Technik Transfer Transparent: SMILE – Eine chinesisch-europäische Raumfahrtmission mit FHNW Beteiligung. Vortrag von Samuel Krucker (I4DS) und Matthias Fankhauser (IPPE) über das neue Projekt. Die Folien sind auf der SMILE-SXI-Projektseite zugänglich.
2019 March 2-3, Swiss Solar Activities at the Science Museum London: Explosiv oder ruhig? Die Schweizer Sonnenphysik a, ‘The Sun Family Festival’ mit einem interaktiven Stand um das am I4DS entwickelte App heliotime.org für helioviewer.org. Für die Schweizer Botschaft anlässlich der Sonderausstellung The Sun – Living with our Star
2019 February 14, Neubad Lecture Luzern: Schwarze Löcher: über untote Sterne, die ihre lebendigen Artgenossen essen, die Raumzeit krümmen und über die Rolle, die sie in unserer Galaxie und im Universum spielen, mit Cédric Huwyler
2018 November 28, Swiss Solar Activities at Science Museum London Lates: Explosiv oder ruhig? Die Schweizer Sonnenphysik an der Late Night mit einem interaktiven Stand um das am I4DS entwickelte App heliotime.org für helioviewer.org. Für die Schweizer Botschaft anlässlich der Sonderausstellung The Sun – Living with our Star
2018 November 22, Space Talks @EG-Bar: Die Geheimnisse des dunklen Universums und die ESA Mission Euclid, mit André Csillaghy
2018 November 1, Space Talks @EG-Bar: Weltraumwetter und die ESA Mission Solar Orbiter, mit Marina Battaglia
2018 October 30, Invited Talk @I4DS: Power Coders – the Coding Academy for Refugees
STEAM Activities and Workshops
2020 March, June Astronomiekurs für Kinder: Der geheime Schlüssel zum Universum, 2. Teil
2020 Jan 18-19, Talks and workshops at Kindermuseum Baden: Meine Sonne – ein leuchtender Stern
2019 Nov-March, Familienworkshops: The active Sun
2019 Oct 11, Workshop für Kinderkrippe: Der Bär sieht mehr
2019 Sept 1, Flick the World: Mach eine leuchtende Sonne / Solar flare alert system
2019 Summer, Workshops: Build your own telescope like the FHNW-pros of the X-ray telescope STIX
2019 March-April, Astronomiekurs für Kinder: Der geheime Schlüssel zum Universum, 1. Teil
2019 Jan 24, Workshop im Naturama: Sind diese Farben echt? Astronomiebilder machen
2018 October 9-12, Tüftelcamp
2012-2018 April, July Ferienplausch