With the concerted efforts of observers, theorists, and experimentalists, we now have a broad understanding of the sequential narrative of how planetary systems form and evolve in time: (i) giant molecular clouds gravitationally collapse to form protostars with accretion discs, (ii) tiny dust particles in the disc coagulate to form pebbles and eventually planetesimals through collisions and disc instabilities, (iii) planetary cores form and accrete gaseous envelopes, (iv) dispersal processes clear the gas in the disc and leave behind rocky debris discs, (v) planetesimals grow/fragment from collisional grinding while radiation pressure removes small grains from the system, and (vi) the remaining planets/debris slip into resonant orbits or are ejected from the system.

In each of these phases, dust, pebbles, and minor bodies (up to planetesimal sizes) play a crucial role in the formation and evolution of planets. However, given the difficulty of observing, reproducing, and/or modelling these objects in realistic environments, we still have large gaps in our understanding of how they behave and evolve within/between each of these phases. Bridging our knowledge in these areas involves exciting challenges, requiring innovations in instrumentation and laboratory techniques, more robust theoretical models, faster numerical algorithms, and simulations of increasing complexity to account for the relevant physical processes. Furthermore, with such interdisciplinary problems, we need a common vocabulary across sub-disciplines to identify complimentary strengths, overlapping interests between groups, and to foster collaboration.



At the end of each session, there is a link to a discussion board where you can submit questions, thoughts, and/or items you want to discuss together as a group (feel free to begin posting/discussing these items prior to the Workshop).

Thursday 23 May 2019
8.30 – 9.00 Arrival and coffee
9.00 – 9.10 Welcome by the organizers
Session 1: Dust and dust aggregates
9.10 – 9.30 Leonardo Testi Dust in disks with ALMA
9.30 – 10.10 Natalia Engler
Silvan Hunziker
Christian Tschudi
Measuring scattered light emission from circumstellar disks
10.10 – 10.30 Greta Guidi Constraining grain size in protoplanetary disks with (sub-)/millimeter observations
10.30 – 10.50 Holly Capelo Experiments with dust and pebble analogues
10.50 – 11.10 Discussion (post a question or discussion item)
11.10 – 11.50 Coffee Break
Session 2: First-generation planetesimals
11.50 – 12.10 Christian Lenz From dust to planetesimals — a journey along 32 orders of magnitude in mass
12.10 – 12.30 Alison Hunt Timing of Rapid Core Cooling Events in the Early Solar System Revealed by the Pd-Ag Chronometer
12.30 – 12.50 Remo Burn Radial Drift and Concurrent Ablation of Boulder-Sized Objects
12.50 – 13.10 Antoine Pommerol Sublimation experiments with ice/dust mixtures
13.10 – 13.30 Discussion (post a question or discussion item)
13.30 – 14.20 Lunch
14.20 – 14.50 Laboratory Tour (preview)
Session 3: Second-generation planetesimals and planetary embryos
14.50 – 15.10 Martin Jutzi The collisional tale of minor bodies as clue to their origin
15.10 – 15.30 Simon Grimm Orbital dynamics of small bodies with non-Newtonian forces
15.30 – 15.45 Clémence Herny Interesting title
15.45 – 16.00 Olga Pinzón 3D Modelling of the activity distribution in the inner-coma of comet 67P/Churyumov-Gerasimenko
16.00 – 16.15 Selina-Barbara Gerig Researching the place of birth of a cometary dust tail
16.15 – 16.30 Discussion (post a question or discussion item)
16.30 – 16.50 Coffee Break
Session 4: Processes at gap edges
16.50 – 17.10 Michiel Lambrechts How the radial pebble flux determines a terrestrial-planet or super-Earth growth mode
17.10 – 17.30 Mark Hutchison Accretion of gas and dust onto embedded planets
17.30 – 17.50 Clement Surville Dusty disks dynamics is not so simple!
17.50 – 18.10 Jean-David Bodénan Chondrules: tracers of early solar system processes and evolution
18.10 – 18.30 Discussion (post a question or discussion item)
18.30 – 18.40 Closing remarks

Participants are welcome to stay after for an informal dinner in town. You can register you interest in attending here.


Please register your attendance by 19 April 2019. Slots for speakers have already been assigned. If your name is in the program above, please send the title and abstract for your presentation to dustpebblesandminorbodies@gmail.com. Please notify us of any last-minute changes, questions, or concerns using the same e-mail address.


The workshop will be held in room 033 on the ground floor of the main building "Hauptgebäude" (Hochschulstrasse 4), just North of the main train station. You can find a map of the immediate surroundings by clicking here or a more extensive map from Google below. The Hauptgebäude is only a few minutes walk from either entrance of the main train station. Alternatively, you can take the elevator near the East ramps to platforms 12/13 that will take you directly up to the grassy park terrace just in front of the Hauptgebäude.


Please note that while the Academic Platform will ultimately pay for participants' travel costs (not for overnight stays), each institute covers the initial travel costs locally on the NCCR level and then later sends a collective bill to the Academic Platform.


Alison Hunt (ETHZ)
Antoine Pommerol (Bern)
Arathy Ravindran (Bern)
Aryavart Anand (Bern)
Christian Lenz (MPIA)
Christian Tschudi (ETHZ)
Christoph Mordasini (Bern)
Clement Surville (Zürich)
Clémence Herny (Bern)
Greta Guidi (Bern)
Gavin Coleman (Bern)

Hans Martin Schmid (ETHZ)
Henner Busemann (ETHZ)
Holly Capelo (Bern)
Jean-David Bodénan (Zürich/ETHZ)
Jan Hoffmann (Bern)
Leonardo Testi (Garching)
Lokesh Mishra (Bern)
Lucio Mayer (Zürich)
Maria Schönbächler (ETHZ)
Mark Hutchison (Bern/Zürich)
Martin Jutzi (Bern)

Michiel Lambrechts (Lund)
Natalia Engler (ETHZ)
Olga Pinzón (Bern)
Remo Burn (Bern)
Ravit Helled (Zürich)
Selina-Barbara Gerig (Bern)
Silvan Hunziker (ETHZ)
Simon Grimm (Bern)
Stefano Spadaccia (Bern)
Tim Lichtenberg (Oxford)
Yann Alibert (Bern)



Scientific Organising Committee

Holly Capelo
Antoine Pommerol
Clement Surville
Lucio Mayer
Mark Hutchison

Local Organising Committee

Holly Capelo
Mark Hutchison