The electron-deficit whistler instability: theory, simulations, and Solar Orbiter observations 03 February 2023, SWA Team Meeting, Bordeaux, France
Electron-Astrophysics – How the Smallest Scales in Space Power the Biggest Structures in the Universe 30 January 2023, Physikalisches Kolloquium, Ruhr-Universität Bochum, Bochum, Germany
The multi-scale physics of the solar wind: theoretical, numerical, and observational challenges
19 January 2023, Space and Planetary Physics Seminar, Lancaster University, Lancaster, UK
Exploring cosmic plasma physics with Parker Solar Probe and Solar Orbiter
07 December 2022, Seminar, Jeremiah Horrocks Institute, University of Central Lancashire, Preston, UK
Instabilities in plasmas with complex distribution functions – linear and quasilinear descriptions
28 November 2022, ISSI Team “Ion Kinetic Instabilities in the Solar Wind in Light of Parker Solar Probe and Solar Orbiter Observations”, Bern, Switzerland
Electron-driven instabilities in the solar wind
15 November 2022, Arcetri 2022 Workshop on Plasma Astrophysics, Arcetri, Italy
Today’s space-weather forecast: temperatures around 100,000 degrees and wind speeds of about 800 km/s
19 August 2022, MS Queen Victoria, Cunard
The giant in our cosmic neighbourhood – What can we learn from the Sun about the stars in our Universe?
15 August 2022, MS Queen Victoria, Cunard
Die Zukunft der Weltraumforschung – Chancen und Herausforderungen von internationalen Forschungskollaborationen
05/06 August 2022, Salzburger Hochschulwochen, Salzburg, Austria
HelioSwarm: A Multispacecraft Mission to Study Turbulence in Space Plasmas
19 July 2022, 44th COSPAR Scientific Assembly, Athens, Greece
Debye: a mission to study electron-astrophysics in the solar wind
19 July 2022, 44th COSPAR Scientific Assembly, Athens, Greece
Our understanding of the solar wind: in-situ observations with Parker Solar Probe and Solar Orbiter
18 July 2022, 44th COSPAR Scientific Assembly, Athens, Greece
Mass, momentum, energy, and angular-momentum budgets
28 June 2022, SHINE Workshop, Honolulu, HI, USA
The large-scale structure of the solar wind: flux conservation, radial scalings, Mach numbers, and critical distances
23 May 2022, EGU General Assembly, Vienna, Austria
Multi-scale processes in space plasmas: from electron scales to the size of the heliosphere
22 April 2022, Applied Mathematics Seminar, University of St. Andrews, St. Andrews, UK, online
The Plasma Analyser (PLA) instrument for Vigil – update and progress
22 April 2022, RAS Specialist Discussion Meeting “Future Solar and Heliospheric Assets for Space Weather Prediction: Instruments, Modelling and Machine-Learning”, Royal Astronomical Society, London, UK, online
Results from the Parker Solar Probe and Solar Orbiter missions
12 April 2022, 48th Annual Plasma Physics Conference, Institute of Physics, Liverpool, UK
The multi-scale nature of the solar wind: kinetic processes and turbulence
02 February 2022, LASP Turbulence Meeting, University of Colorado, Boulder, USA, online
In-situ science results from Solar Orbiter: examples and future prospects
14 December 2021, AGU Fall Meeting 2021, New Orleans, LA, USA, online
Flux conservation, radial scalings, Mach numbers, and critical distances in the solar wind: magnetohydrodynamics and Ulysses observations
13 December 2021, AGU Fall Meeting 2021, New Orleans, LA, USA, online
Local electron processes and their effects on the global evolution of the solar wind
23 November 2021, ISSI Team “Heliospheric Energy Budget: From Kinetic Scales to Global Solar Wind Dynamics”, Bern, Switzerland
The global structure of the solar wind: mass, momentum, energy, and angular-momentum fluxes from Solar Orbiter and other missions
16 November 2021, Arcetri 2021 Workshop on Plasma Astrophysics, Arcetri, Italy
The Solar Wind and ESA’s Solar Orbiter Mission
06 November 2021, Young Elite Scientists Summit (YESS), 3rd World Science and Technology Development Forum (WSTDF), Beijing, China, online
The solar wind from the Sun to the Earth: a multi-scale plasma
02 November 2021, International Space Weather Initiative Workshop on Space Weather: Science and Applications, United Nations Office for Outer Space Affairs (UNOOSA) and Vikram Sarabhai Space Centre of the Indian Space Research Organization (ISRO), India, online
A short tutorial of the solar wind
15 September 2021, Astro and Solar Plasma Group, online
An overview of the first in-situ results from Solar Orbiter 25 August 2021, Joint Assembly IAGA-IASPEI 2021, online
Using Solar Orbiter and other assets to explore the global structure of the solar wind: mass, momentum, energy, and angular-momentum fluxes 22 July 2021, National Astronomy Meeting of the Royal Astronomical Society, online
The solar wind angular-momentum flux observed during Solar Orbiter’s first orbit 27 April 2021, EGU General Assembly, online
The solar-wind angular-momentum flux observed during Solar Orbiter’s first orbit 18 March 2021, Solar Orbiter In-situ Working Group “CMEs, CIRs, HCS and large-scale structure”, online
Kinetics of solar-wind electrons: expansion, instabilities, and collisions 30 November 2020, CFSA Seminar, Centre for Fusion, Space and Astrophysics, University of Warwick, online
Kinetic physics of the electrons in the solar wind 09 October 2020, Heliophysics Seminar, Princeton University, online
Der Sonne ganz nah – die neuesten Ergebnisse von Solar Orbiter
13 August 2020, Faszination Astronomie Online, Haus der Astronomie, Heidelberg, online
Kinetic physics, collisions, and turbulence in the solar wind: a multi-scale perspective
14 July 2020, MIST Online Seminar Series, online
Die neuesten Entwicklungen in NASAs und ESAs Programm zur Erforschung des Sonnensystems
25 May 2020, Rotary Club Heidelberg, online
Kinetic theory and simulation of electron-strahl scattering in the solar wind
06 May 2020, EGU General Assembly, online
Die neuesten Entwicklungen in NASAs und ESAs Programm zur Erforschung des Sonnensystems
29 April 2020, Rotaract Club Heidelberg, online
Electron-astrophysics – ideas for future space missions
27 April 2020, LASP Turbulence Meeting, University of Colorado, Boulder, online
Solar Orbiter Science Briefing
07 February 2020, ESA Social-media Event for the Launch of Solar Orbiter, European Space Operations Centre, Darmstadt, Germany
Understanding and linking the solar wind: plasma kinetics with Solar Orbiter SWA
14 January 2020, ISSI Team “Exploring The Solar Wind In Regions Closer Than Ever Observed Before”, Bern, Switzerland
Self-induced scattering of the electron strahl in the inner heliosphere
29 October 2019, 2019 Arcetri Workshop on Plasma Astrophysics, Arcetri, Italy
A brief introduction to kinetic physics and turbulence in the solar wind
26 August 2019, China University of Geosciences, Beijing, China
The multi-scale behaviour of the solar wind: kinetic physics, collisions, and turbulence
26 August 2019, National Space Science Center, Chinese Academy of Sciences, Beijing, China
Electron-astrophysics – ideas for new space missions
22 August 2019, Graduate Academic Conference on Turbulence and Magnetic Reconnection, Beijing, China
The fluidisation of plasma turbulence – theory and observations
21 August 2019, Peking University, Beijing, China
Kinetic processes, turbulence, and the multi-scale evolution of the solar wind
05 August 2019, SHINE Workshop, Boulder, CO, USA
Multi-scale plasma processes in the solar wind
03 July 2019, National Astronomy Meeting of the Royal Astronomical Society, Lancaster, UK
The Debye mission: measuring electron-scale turbulence in the solar wind
04 June 2019, Waves Côte d’Azur, Université de Côte d’Azur, Nice, France
Debye: electron-astrophysics in the solar wind
29 May 2019, Solar Wind Electron Workshop, ESAC, Villafranca del Castillo, Spain
Measuring electron-scale turbulence with Debye
11 April 2019, EGU General Assembly, Vienna, Austria
Debye: design for an ESA F-Class mission to study electron heating in space and astrophysical plasma
08 April 2019, EGU General Assembly, Vienna, Austria
Large-scale and small-scale turbulence: particles and fields
29 March 2019, SWA Team Meeting, Florence, Italy
Studying large-scale and small-scale solar-wind turbulence with Solar Orbiter: particles and fields
25 February 2019, ISEE Symposium “Recent progress in heliospheric physics by direct measurements of unexplored space plasmas”, Nagoya University, Nagoya, Japan
The multi-scale nature of the solar wind 14 December 2018, AGU Fall Meeting, Washington, DC, USA
The solar wind: a multi-scale astrophysical plasma 23 November 2018, School of Physics and Astronomy Seminar, Queen Mary University of London, London, UK
Is the fast solar wind (almost) always unstable? 22 October 2018, 2018 Arcetri Workshop on Plasma Astrophysics, Arcetri, Italy
The Oblique Whistler-wave Instability Driven by the Electron Strahl 25 September 2018, SWA Team Meeting, Prague, Czech Republic
How unstable is the solar wind? 26 July 2018, Fluids & Plasmas Seminar, University of Delaware, Newark, DE, USA
Science with SWA and ALPS (The Arbitrary Linear Plasma Solver) 16 May 2018, SWA Team Meeting, Frascati, Italy
The Dynamics of Compressive Fluctuations in the Solar Wind: Fluid or Kinetic? 26 April 2018, 8th Meeting of Isradynamics – “Dynamical Processes in Space Plasmas”, Ein Bokek, Israel
The Arbitrary Linear Plasma Solver (ALPS): A New Tool for Kinetic Physics with Solar Orbiter and Parker Solar Probe 11 April 2018, EGU General Assembly, Vienna, Austria
Turbulence-driven Kinetic Instabilities and Their Effects on Particle Scattering in the Solar Wind 04 April 2018, European Week of Astronomy and Space Science, Liverpool, UK
Space plasma physics with ALPS: The Arbitrary Linear Plasma Solver 27 March 2018, Spring MIST, University of Southampton, Southampton, UK
Plasma-Astrophysics: The Connection Between Global Dynamics and Kinetic Plasma Physics 15 February 2018, Astrophysics Group Seminar, Mullard Space Science Laboratory, University College London, Dorking, UK
Cutting-edge Kinetic Physics with Parker Solar Probe and Solar Orbiter: The Arbitrary Linear Plasma Solver (ALPS) 12 December 2017, AGU Fall Meeting, New Orleans, LA, USA
Do we even need kinetic physics to describe the solar wind? 22 November 2017, Solar System Group Meeting, Mullard Space Science Laboratory, University College London, Dorking, UK
Using ALPS with Solar Orbiter to Understand Waves and Instabilities in the Solar Wind 10 November 2017, RAS Specialist Discussion Meeting “Solar Orbiter: Synergy Between Theory and Observations”, Royal Astronomical Society, London, UK
Polarisation Properties of Kinetic and MHD Slow Modes in the Solar Wind 26 October 2017, 2017 Arcetri Workshop on Plasma Astrophysics, Arcetri, Italy
Fluctuations in the Collisionless Solar Wind: MHD or Kinetic? 19 October 2017, Plasma Seminar, University of Oxford, Oxford, UK
The Polarization of Compressive Fluctuations in the Solar Wind: MHD, Kinetic Theory, and In-situ Observations 24 August 2017, Parker Solar Probe Theory Telecon
The Applicability of MHD to Describe a Collisionless Plasma Like the Solar Wind 16 August 2017, Numerical Techniques in MHD Simulations Workshop, University of Cologne, Cologne, Germany
Using WIND to Study Compressive Fluctuations in the Solar Wind 20 July 2017, WIND SWG Telecon
The Fluid-like Behavior of Compressive Fluctuations in the Collisionless Solar Wind 19 June 2017, IPELS Workshop, San Diego, CA, USA
Compressive Turbulence in the Solar Wind – Kinetic vs. Fluid Models 07 June 2017, Astroplasmas Seminar, Princeton University, Princeton, NJ, USA
Fluid and Kinetic Plasma Modes in the Collisionless Solar Wind 01 May 2017, Space Physics Seminar, University of California at Berkeley, Berkeley, CA, USA
How Fluid-like are the Compressive Fluctuations in the Solar Wind 21 February 2017, Seminar, Imperial College, London, UK
Compressive Turbulence and Its Effects on Kinetic Instabilities in the Solar Wind 14 February 2017, Extra-Seminar, University of Bonn, Bonn, Germany
ALPS: The Arbitrary Linear Plasma Solver 17 December 2016, Wind Team Meeting, Berkeley, CA, USA
Collisionless Isotropization of the Solar-Wind Protons by Compressive Fluctuations and Plasma Instabilities 15 December 2016, AGU Fall Meeting, San Francisco, CA, USA
Regulation of the Electron Strahl by Kinetic Instabilities in the Solar Wind 11 December 2016, FIELDS Science Team Meeting, Berkeley, CA, USA
Fluctuating-Moment Effects in the Solar Wind: A Kinetic Response to Compressive Plasma Turbulence 09 November 2016, Space Science Center Seminar, University of New Hampshire, Durham, NH, USA
Fluctuating-Moment Effects due to Compressive Plasma Turbulence in the Solar Wind 12 September 2016, Imperial College, London, UK
Compressive Fluctuations and their Effects on Particle Kinetics in the Solar Wind 05 September 2016, Mullard Space Science Laboratory, University College London, Dorking, UK
Isotropization of the Solar Wind through Plasma Instabilities Induced by Compressive Fluctuations 07 April 2016, 15th Annual International Astrophysics Conference, Cape Coral, FL, USA
Electron-Driven Instabilities and their Implications for Turbulence in the Solar Wind 06 July 2015, SHINE Workshop, Stowe, VT, USA
Alpha-Particle/Proton Differential Flow in the Solar Wind: Implications for Plasma Heating, Azimuthal Flow, and the Parker Spiral Magnetic Field 17 December 2014, AGU Fall Meeting, San Francisco, CA, USA
Alpha-Particle Energetics in the Solar Wind: Instabilities, the Rotational Force, and Particle Heating 14 December 2014, FIELDS Science Team Meeting, Berkeley, CA, USA
Deceleration of Alpha Particles in the Solar Wind by Instabilities and the Rotational Force 29 October 2014, Space Science Center Seminar, University of New Hampshire, Durham, NH, USA
Dissipation of Plasma Turbulence by Stochastic Heating 23 June 2014, SHINE Workshop, Telluride, CO, USA
Alpha Particles in the Solar Wind: Instabilities Driven by Beams and Temperature Anisotropies 13 June 2014, Institute for Geophysics and Meteorology, University of Cologne, Germany
Resonant Instabilities Driven by Anisotropic Alpha-Particle Beams in Collisionless Plasmas 13 March 2014, 13th Annual International Astrophysics Conference, Myrtle Beach, SC, USA
Kinetic Instabilities Driven by Alpha Particles and Their Contribution to Solar-Wind Heating 10 December 2013, SWEAP Science Team Meeting, Berkeley, CA, USA
Stochastic Heating at Beta of Order Unity 08 December 2013, HTP Team Meeting, Berkeley, CA, USA
Kinetic Instabilities Driven by Anisotropic Ion and Electron Beams in the Solar Wind 29 October 2013, SPRG Seminar, University of California at Berkeley, Berkeley, CA, USA
Preferential Ion Heating by Waves and Turbulence in the Solar Wind 25 June 2013, SHINE Workshop, Buford, GA, USA
Cascade on Kinetic Scales in Two-Dimensional Hybrid Simulations 05 June 2013, Meeting on Solar Wind Turbulence, Kennebunkport, ME, USA
Wave Generation by Alpha-Particle Driven Instabilities in the Solar Wind 16 April 2013, Institut für Weltraumforschung, Österreichische Akademie der Wissenschaften, Graz, Austria
Beam Instabilities Driven by Alpha Particles with Temperature Anisotropies in the Fast Solar Wind 27 March 2013, First Solar Probe Plus Workshop, Pasadena, CA, USA
Kinetic Instabilities Driven by Alpha Particles in the Solar Wind 14 March 2013, The 42nd UK Fusion Theory Seminar, Culham, UK
Resonant Instabilities and Scattering of the Electron Strahl 04 December 2012, HTP Team Meeting, Berkeley, CA, USA
A parallel-propagating Alfvénic ion-beam instability in magnetized high-beta space plasmas 04 December 2012, HTP Team Meeting, Berkeley, CA, USA
On the generation of oblique high-frequency waves by ion beams in the solar wind 19 September 2012, Workshop “Turbulent cascade in the solar wind: anisotropy and dissipation”, Paris, France
The anisotropic cascade of solar wind turbulence beyond MHD scales in two-dimensional hybrid simulations 01 February 2012, 511. WE-Heraeus-Seminar “From the Heliosphere into the Sun — Sailing against the Wind”, Bad Honnef, Germany
Über konvektierte Wellenstrukturen und spektralen Transfer in Weltraumplasmen — Anwendungen auf Sonnenkorona und Sonnenwind 11 January 2012, Disputation, TU Braunschweig, Germany
Hybrid simulations of the two-dimensional cascade of weak solar wind turbulence beyond MHD scales 09 December 2011, AGU Fall Meeting, San Francisco, CA, USA
Parametrischer Zerfall und kinetische Kaskade — spektraler Transfer in Weltraumplasmen 27 October 2011, Oberseminar Theoretische Physik, TU Braunschweig
Parametric decay and kinetic cascade — spectral transfer in space plasmas 26 October 2011, Solar System Seminar, MPS Lindau, Germany
Compressive wave structures on kinetic scales resulting from a two-dimensional turbulent cascade in the solar wind 16. September 2011, Workshop “Cosmic Rays and the Heliospheric Plasma Environment”, Bochum, Germany
Apparent temperature anisotropies due to wave activity in the solar wind 19. April 2011, 478. WE-Heraeus-Seminar “Fusion and Astrophysical Plasmas”, Bad Honnef, Germany
Schwach kompressive, hochfrequente Wellen im inhomogenen Multifluid-Plasma 22. February 2011, DGG-Jahrestagung, Köln, Germany
Compressive high-frequency waves riding on an Alfvén-cyclotron wave in a multi-fluid plasma 26. January 2011, Oberseminar Theoretische Physik, TU Braunschweig, Germany
Compressive high-frequency waves riding on an Alfvén-cyclotron wave in a multi-fluid plasma 15. December 2010, Solar System Seminar, MPS Lindau, Germany
Mikroturbulenz und Energiekaskade in Weltraumplasmen — Multifluid- und kinetische Betrachtungen 03. June 2010, Oberseminar Theoretische Physik, TU Braunschweig, Germany
Kinetics of non-Maxwellian distribution functions in the turbulent solar wind 23. March 2010, Workshop “New perspectives on cosmic rays in the heliosphere”, Parys, South Africa
Kinetik nicht-maxwellscher Verteilungsfunktionen des turbulenten Sonnenwindplasmas 16. March 2010, DPG-Frühjahrstagung, Bonn, Germany
Kinetics of solar wind turbulence — feedback on the proton distribution function 27. January 2010, Solar System Seminar, MPS Lindau, Germany
Kinetik der Abbremsung und Dissipation des Sonnenwindplasmas am heliosphärischen Schock 02. April 2009, DPG-Frühjahrstagung, Greifswald, Germany
IBEX: Theoretische Grundlagen 20. January 2009, Extra-Seminar bei Hans Fahr, AIfA Bonn, Germany
Solar wind proton reflection and induced injection to the ACR regime at the quasi-parallel termination shock 11. November 2008, 2nd International Heliophysical Year Conference, ISSI Bern, Switzerland
Ionen-Injektion in den Fermi-1-Prozeß 06. May 2008, Extra-Seminar bei Hans Fahr, AIfA Bonn, Germany
Kinetische Betrachtung des parallelen magnetohydrodynamischen Schocks 05. March 2008, DPG-Frühjahrstagung, Freiburg, Germany
Das Feldlinienkonzept: Sinn oder Unsinn 10. July 2007, Extra-Seminar bei Hans Fahr, AIfA Bonn, Germany
Beziehungen des Mondes zur Erde im “Bonner Sternenhimmel”, Bonn, Germany
Temperaturmessung 16. June 2006, Meteorologisches Instrumentenpraktikum, Universität Bonn, Germany
Das Nilssonmodell 11. January 2006, Seminar “Kernmodelle und ihre experimentelle Überprüfung”, Universität Bonn, Germany
Microquasars as counterparts of unidentified EGRET sources Astrophysikalisches Seminar, Universität Bonn, Germany