Lightning on other planets
key note speaker, Electrostatics 2019, Manchester

Lightning on Brown Dwarves and Exoplanets
invited talk, Royal Society meeting ‘Advances in Hydrogen Molecular Ions: H3+, H5+ and beyond’, Kavli Centre, Chicheley Hal


Exoplanets and Habitability
invited talk at the 2018 Wilhelm und Else Heraeus-Seminar
‘Prebiotic molecules in space and origins of life on Earth’
19 – 13 March 2018, Bad Honnef

Exoplanets: Humanity through the lens of the Universe
April 2018, Lecture for Universities of St Andrews Open Association

Lunchtime legends
CAPOD course on leading a research group, 7 February 2018


Have we reached the horizon of our knowledge?
Cloud formation in brown dwarfs and extrasolar planets
30 November 2017, FMF Symposium, Groningen
Cloud formation is a long-standing challenge that recently received new attention with the discovery of brown dwarfs and extrasolar planets. Clouds are part of our everyday-life on Earth, most of the solar system planets are covered with clouds, and clouds do determine (and limit) our knowledge about exoplanet’s habitability. Clouds are linked to lightning which is discussed as trigger for life on Earth and maybe elsewhere. Modelling the formation of clouds is seen as one of the biggest challenges in modern astronomy, and clouds introduce the largest uncertainty into terrestrial climate predictions. So, have we reached our limits?

Deciphering exoplanet atmospheres in virtual laboratories
2 October 2017, Colloquium, University of Groningen

The Theory body behind Cloud and Dust Formation
20 September 2017, University Leuven

Modelling Exo-Clouds: the element abundance challenge
The PLATO Mission Conference 2017: Exoplanetary systems in the PLATO era
5 – 7 September 2017

Partially ionised atmospheric gas in cloud-forming, ultra-cool low mass objects
European Week of Astronomy and Space Science 2017
26 – 30 June 2017, Prague:
–> Energy release and radiation in partially ionized plasma of solar and stellar atmospheres

Diverse clouds in chemically diverse atmospheres of extrasolar planets with lightning
18 May 2017, Cambridge, Climate Science, Atmospheres and Life: From the Earth and Beyond

Charge Processes in Planetary Atmospheres
11 May 2017, Edinburgh Centre for Exoplanet Science

StA-CES @ IBANS Research Forum
23 March 2017, St Andrews

Sparkling clouds and the crackling of lightning in extrasolar planets
Public talk in winter series of British Science Association during Women in Science Festival in Dundee.
16 March 2017

The modellers take on clouds: what we know / don’t know
panel discussion talk in “Prospects to understand cloudy exoplanets” discussion during
UK Exom 2017,
15 – 17 March 2017, St Andrews

Charge processes, lighting in exoplanets
Lecture at the Les Houches Winter School  Diversity of planetary circulation regimes, in our solar system and beyond, March 6-10, 2017


New insight in atmospheres of extrasolar planets through plasma processes
Seggauberg, October 2016

Diverse clouds in chemically diverse planetary atmospheres
Missing links from disks to planets, Konkoly Observatory, Budapest

Exoplanetary atmospheres:
Cloud formation and atmospheric electrification

Colloquium Oxford, June 2016

LEAP – Lightning, electricity, atmospheres of planetary objects
Colloquium Leicester, June 2016

LEAP – Lightning, electricity, atmospheres of planetary objects
Colloquium Cambridge, May 2016

Electricity in extrasolar planetary atmospheres
Colloquium Glasgow, April 2016


Plasma Processes in Cloud-forming Exoplanet and Brown Dwarf Atmospheres
29 Nov – 4 Dec 2015, invited contribution, Extreme Solar Systems III, Hawaii

Hot physics in cool atmospheres:
Cloud forming, radio emitting brown dwarf atmospheres
9 November 2015, UCL seminar talk

Exoplanet Atmospheres
5 – 8 October 2015, invited special talk, From clouds to protoplanetary disks: the astrochemical link, Berlin, Harnack Haus

Ionisation and discharge in cloud-forming extrasolar planetary atmospheres
23 – 28 August 2015, invited contribution, IPELS 2015, Pitlochry

Dust formation and the emergence of ionised clouds in atmospheres of planetary objects
17- 21 August 2015, contributed talk, Cosmic Dust 2015, Tokyo

Theory and Modelling of cloud formation for   planets ad brown dwarf atmospheres
30 July 2015, LEAP summer lecture series, St Andrews

Atmospheres of very-low mass stars and brown dwarfs – Recent results and prospectives
7-10 August 2015, invited review talk (not given)
Division G ‘Stars and Stellar Physics’ , IAU Assembly

Chemistry and physics of clouds in atmospheres
Planetary systems: A synergistic view
19-25 July 2015, invited talk, Quy Nhon, Vietnam

Data Needs in Solid State Astrochemistry
22 May 2015, invited talk, RES, Edinburgh

Ionisation in ultra-cool, cloud forming extrasolar planetary atmospheres
EGU, Origin of life and habitability: From Early Earth to the Solar System and Beyond (PS8.1/BG8.1), 12 – 17 April 2015, Vienna

Exoplanetary research in St Andrews
UK Community Exoplanetary Conference 2015
30 March – 1 April 2015, Warwick

Lunchtime Legends: Leading a Research Group
Professional and career management,
invited contribution, University of St Andrews, 30 March 2015

Planets, Atmospheres, Electricity, Life
Quantum SOC , University of St Andrews, 11 March 2015

New trends in atmosphere studies of ultra-cool stars:
ionisation in cloud forming atmospheres

ESO , science seminar, 4 March 2015

ESO , Women in Science workshop, 5 March 2015


Electrification of ultra-cool atmospheres across the star-planet boundary

MHD day Potsdam
December 2014, Potsdam

Bridging gaps and opening windows:
Electrification processes in cloud-forming ultra-cool stars and in planets

MPE Garching , seminar, December 2014

How charge processes affect exoplanetary atmospheres

Getting ready for Planetology beyond the Solar System
November 2014, invited contribution, Ringberg

astrophysical atmospheric electricity

Royal Meteorological Society Specialist Group on Atmospheric Electricity
5 November 2014, invited contribution, Bath, UK

Gemstones and Clouds in planets outside the solar system

21 September 2014, Anstruther Science Cafe

Large-scale properties of lightning in extrasolar objects

April 2014, EGU meeting 2014 , Vienna
Session Atmospheric Electricity, Thunderstorms, Lightning and their effects

Evolution of the atmosphere of exoplanets

April 2014, invited review, Exoplanetary Science , Quy Nhon, Vietnam

Expect the unexpected:
Non-equilibrium processes in Brown Dwarf model atmospheres

March 2014, Gaia and the Unseen: The Brown Dwarf Question , Torino, Italy

Ionisation regimes structuring planetary atmospheres

February 2014, ExoClimes III , Davos, Switzerland

Ionising atmospheres in Brown Dwarfs

January 2014, Bcool meeting , St Andrews, UK


Microphysics approach to atmospheric cloud formation in astrophysics

October 2013, seminar in Computational Chemistry, School of Chemistry, University of St Andrews

Clouds form everywhere: in Brown Dwarfs, Planets and in Gaps

September 2013, invited review, Exoplanets/Brown Dwarfs Mind the Gap, Hertfordshire 2013

Mineral clouds and ionisation processes in extrasolar, planetary atmospheres

September 2013, key note, EPSC 2013, Session Lightning, charging and atmospheric electricity, London 2013

Electrostatic break-down in thermally unionised, ultra-cool atmospheres

July 2013, Session 22: ‘Brown dwarfs and low mass stars’ , NAM 2013 , St Andrews, UK

Survey results: women astronomer in science

July 2013, invited contribution, lunch event ‘Women in Science’, NAM 2013 ,
St Andrews, UK

Survey of astronomers and their views on careers

July 2013, invited contribution, Session 17: ‘Careers, Work-Life balance and Returning’,NAM 2013 , St Andrews, UK

Mineral clouds and the conditions for lightning in atmospheres of extra-solar, planetary objects

May 2013, invited seminar, STARPLAN, Copenhagen, Denmark

Extra-solar lightning in atmospheric dust clouds

April 2013, TEA-IS network meeting,Technische Universität Wien, Austria

Ionisation of ultra-cool, cloud-forming atmospheres

March 2013, 527. Wilhelm und Else Heraeus-Seminar ‘Plasma and Radiation Environment in Astrospheres and Implications for the Habitability of Extrasolar Planets’,Bad Honnef, Germany

Ionisation processes in ultra-cool atmospheres of low-mass stars

March 2013, invited talk , Nagoya University, Gifu, Japan, more information

Clouds in the atmospheres of exoplanets and brown dwarfs

March 2013, invited seminar, NAOJ , Tokyo, Japan

Ionisation of dusty, cloud forming atmospheres

March 2013, invited seminar, Tokyo Institute of Technology, Japan
with video streaming to Tokyo University, Japan

Atmospheres of Brown Dwarfs and Giant Gas Planets

February 2013, invited seminar, Nagoya University, Japan

Physics of clouds in brown dwarfs and exoplanets

February 2013, invited talk, Royal Astronomical Society, Specialist Discussion Meeting on clouds and condensates on hot exoplanets, London, UK


The Richness of Substellar Atmospheres: Cloud Formation and Global Electric Circuits

November 2012, Joint Astronomy Colloquium in Heidelberg, Germany

Why are BD atmospheres so special?

October 2012, International Conference ’50 Years of Brown Dwarfs’ at Ringberg castle, Bavaria, Germany
see press release

Electric field break-down in mineral clouds on giant gas planets

27 – 31 August 2012, contributed talk, IAU Symposium 293 , IAU Assembly, Beijing, China

The impact of non-equilibrium cloud formation on the atmosphere chemistry

June 2012, contributed talk, Opacities in Cool Stars and Exoplanets , Windsor, UK

What properties of M dwarfs can we reliably infer from models?

June 2012, invited talk, Splinter Meeting ‘M Dwarf Stars in the Light of
(Future) Exoplanet Searches’ at Cool Stars 17 , Barcelona, Spain
More Information

Theory of Clouds

June 2012, invited review, Splinter ‘Clouds in Brown Dwarfs and Giant Gas Planets’ atCool Stars 17 , Barcelona, Spain
More Information

Spectral test cases for model atmospheres of planetary atmospheres

May 2012, ETH Zurich, EChO WG1

Why Brown Dwarfs need their minerals

March 2012, Invited Seminar, University of Hertfortshire

Modelling cloud formation in extraterrestrial atmospheres

February 2012, Invited Seminar, University of Leeds

Atmospheric dust

January 2012, invited review, ExoClimes 2012 meeting, Aspen Center for Physics


Dust cloud formation models

December 2011, invited review, GCM & Exoplanets , Exeter, UK

Electrification in extraterrestrial atmospheres

November 2011, Franco-British meeting at French Embassy, London, UK
Science and Technology Department

LEAP – charge processes in planetary atmospheres

November 2011, St Andrews, UK

Modelling seed formation, growth and evaporation of dust in oxygen-rich astrophysical environments

September 2011, AstroSurf Meeting 2011, Heriot-Watt University, Edinburgh, UK

Extraterrestrial lightning in atmospheric dust clouds

05 October 2011, La Cité Internationale des Congrès Nantes Métropole, Nantes, France
see more

Cloud formation in brown dwarf atmospheres

September 2011, invited talk, AG Meeting Heidelberg, Germany
more information

The richness of substellar physics:
From cloud formation, lightning, and bow shocks

May 2011, Colloquium, Vienna, Austria

Modelling dust formation in brown dwarf and planetary atmospheres

March 2011, Kavli Royal Society International Center, Chicheley Hall , UK

Modelling cloudy atmopsheres:
Element abundances as parameter and as result

March 2011, University College London, UK

Lightning in cloudy extra-solar atmospheres?

February 2011, Planet Formation and Evolution , Goettigen, Germany


Making extra terrestrial jewellery

The Astronomical Society of Edinburgh, Scotland , UK, 2010

Thunder in Brown Dwarfs and planets?

November 2010, Uppsala

The jewelry of luminous giants and dim dwarfs (Abstract)

October 2010, The Newcastle upon Tyne Astronomical Society, Newcastle, UK

The WASP12 star-planet system: How shocking can it be?

September 2010, Zooming in: The Cosmos at High Resolution , 2010 Meeting of the Astronomische Gesellschaft, Bonn, Germany


July 2010, ERC grant panel, Brussels, Belgium
(postponed due to Icelandic volcano eruption)

Making extra-terrestrial jewelry

July 2010, The Astronomical Society of Edinburgh

Atmosphere Chemistry in substellar objects: Brown Dwarfs and giant gas planets (Abstract)

June 2010, Open University, Milton Keynes, UK

Masking the truth:
Metallicity effects with substellar atmosphere clouds

June 2010, Laboratoire d’Astrophysique de l’Observatoire de Grenoble, France

Kinetic dust formation and turbulence modeling in substellar atmospheres

Mai 2010, European Geoscience Union, General Assembly 2010, Planetary & Solar System Sciences , Vienna

Metals in the exosphere of WASP-12b

March 2010, Coffee discussion, KITP Santa Barbara, US

How dead is the dead zone??

March 2010, Coffee discussion, KITP Santa Barbara, US

Dust formation, turbulence and large scale atmosphere simulations

March 2010, Coffee discussion, KITP Santa Barbara, US

Physik und Chemie in kalten Atmosphaeren: Von Braunen Zwergen, Riesen und Planeten

January 2010, Invited Talk, University Wuerzburg


The jewelry of luminous giants and dim dwarfs (Abstract)

November 2009, Institute of Physics at Sellafield , Whitehaven, Cumbria, UK

Physics and Chemistry in Dust Forming Objects and
Observation and Analysis of Starlight

October 2009, Invited Talks, Utrecht, The Netherlands

Atmospheric clouds: element sink and charge source (Abstract)

9 October 2009, Invited Talk, RAS Discussion Day : Exoplanets and their Environments Burlington House, London

Theoretical and observational differences between BDs and free-floating planets (Abstract)

September 2009, Invited Talk, workshop Recipes for making brownies : theory vs. observation,
ESTEC, Noordwijk, The Netherlands

Atmosphaeren am stellaren Limit

August 2009, Invited Talk, University Hamburg, Germany

Silicate, ruby, and opal in the atmospheres of Brown Dwarfs and planets

April 2009, Contributed Talk, Robert Cormack Bequest Meeting 2009, Dundee, Scotland, UK

Weather forecast for extra-solar objects: Modeling dust cloud formation and turbulence

April 2009, Seminar, University Rostock, Germany

A method of modeling dust formation in atmospheric environments

April 2009, Seminar, Leibniz Institute for Tropospheric Research, Leipzig, Germany

Atmospheric dust clouds and charge production in Brown Dwarfs

March 2009, Seminar, University Glasgow, Scotland, UK

Cloud Chemistry in Cool and Compact Atmospheres

March 2009, Contributed Talk, Conference: The Formation of Planets: The Solar System and Extrasolar Planets ,Tuebingen, Germany

Dust formation, charge production, and turbulence

February 2009, Invited talk, workshop Turbulence-Assisted Planet Growth , Upsalla, Sweden

The chemical evolution of dust and gas in substellar atmospheres

February 2009, Wednesday lunch talk, Kaptyn Institut, University Groningen, The Netherlands


The chemical evolution of dust and gas in substellar atmospheres

September 2008, Contributed Talk, Conference: Cosmic Dust – Near & Far , Heidelberg, Germany

Dust cloud formation in substellar atmospheres

July 2008, Invited Review Talk, Conference: Cool Stars 15 , St Andrews, UK

Comparative study of cloud formation in brown dwarf models

July 2008, Invited Splinter Talk, Conference: Cool Stars 15, Splinter: Observation and modelling of dusty, low gravity L, and M dwarfs, St Andrews, UK

Glittery clouds in exo-planetary atmospheres: An example for non-equilibrium dust formation

July 2008, Contributed Talk, 3rd Conference of the Astrobiology Society of Britain: “The Living Universe”, Cardiff, UK

Atmosphere simulations: Believe-it-or-not?

April 2008, Invited Colloquium, ARI Heidelberg, Germany

Brown Dwarf atmospheres: dust formation and radiative transfer

April 2008, Invited Seminar, University Goettingen, Germany

Shiny clouds in Brown Dwarfs

April 2008, Contributed Talk, Conference: National Astronomy Meeting of the RAS 2008 , Belfast, UK

Atmosphere simulations: Believe-it-or-not?

January 2008, ESTEC RSSD External Seminar (invited), Noordwijk, The Netherlands


Silicate, ruby, opal – Why gas giants keep their jewels in the atmosphere

October 2007, Contributed Talk, IAU Symposium 249 EXOPLANETS: Detection, Formation and Dynamics, Suzhou, China

Comparative study of dust cloud modelling in substellar atmospheres

September 2007, Contributed Talk in Splinter at AG meeting Cosmic Matter, Wuerzburg, Germany

Cloud formation in giant planets

June 2007, Invited Talk at Extreme Solar Systems, Santorini, Greece

Heavy Weather: Cloud formation in brown dwarfs and giant planets

June 2007, Seminar, St Andrews, Scotland, UK

The challenge of substellar cloud formation

May 2007, Invited Talk at Trends in Radiation Hydrodynamics, NORDITA, Stockholm, Sweden

The jewelry of luminous giants and dim dwarfs

March 2007, University Wuerzburg, (invited) Seminar

Catching the rain: Non-equilibrium dust cloud formation

January 2007, (invited) Colloquium, MPI Mainz, Germnay


Dust formation in cool atmospheres

May 2006, Invited Talk, Birthday colloquium for Prof.Pfau and Prof. Zimmermann, Jena, Germany


June 2006, Invited Talk, Physics Colloquium, Jena, Germany

Time-dependent modelling of oxygen-rich dust formation

August 2006, Contributed Talk, JD 11, IAU General Assembly, Prague, CSR

Introduction to Workshop Idea

October 2006, Initiating Talk, From Brown Dwarfs to Planets: Comparative Workshop, Lorence Center, Leiden, The Netherlands

Catching the rain: Recent success in brown dwarf atmosphere modelling

November 2006, Michelson Science Center, CalTech, Pasadena, US


Stellar Dust Formation: A theoretical approach in application

January 2005, Invited Colloquium, University Bochum, Germany

The need for the smallest & the largest: The brown dwarf’s weather

January 2005, Invited Colloquium, MPI Bonn, Germany

The need for small-scale turbulence in substellar atmospheres

April 2005, Contributed Talk, Workshop on Interdisciplinary Aspects of Turbulence, Ringberg, Germany

Simulations of substellar atmospheres: More than an extra-terrestrial weather forecast?

May 2005, Invited Colloquium, Sterrewacht Leiden, The Netherlands

Make dust equivalents

May 2005, ThinkShop, University Jena, Germany

Modelling dust properties at the L-T transition

October 2005, Contributed Talk, Brown Dwarf workshop, PPV, Hawaii, US

Gemstones in brown dwarf atmospheres?

November 2005, Seminar, American Museum of National History, New York, US

Before 2005

2004: Prag, 2x Hamburg, Leiden, Noordwijk, Berlin (habil)
2003: Freiburg, Garching, Jena, Magdeburg, Postdam, Weimar
2002: Berlin, Garching
2001: Muenchen, Prag, Berlin
2000: Bremen, Magdeburg
1999: Goettingen, Wien, 2x Berlin
1997: Kopenhagen