Jon Ramsey’s Webpage


Welcome! I am currently a post-doctoral research fellow at the Centre for Star and Planet Formation (StarPlan), which is a Centre of Excellence hosted jointly by the Natural History Museum of Denmark and the Niel Bohr Institute, both themselves part of the University of Copenhagen.

My research lately focuses on topics within, or related to, planet formation:

  • Numerical methods for simulation of hydro-, magneto- and radiation hydrodynamics, in particular high performance and adaptive resolution methods.
  • The earliest stages of planet formation, particularly while the protoplanetary accretion disk still dominates (e.g., planetary embryo formation and growth).
  • The chemistry and thermodynamics of protoplanetary disks, in particular things which can affect the disk structure. Molecular and icy chemistry in protoplanetary disks also falls under this umbrella.
  • The launching and collimation of magnetically-driven jets from young stellar objects;
  • Photoevaporation of protoplanetary discs by stellar UV photons.

Recent news

January 2018

A paper written by Andrius Popovas, Åke Nordlund and I on pebble accretion onto terrestrial-mass planetary embryos has been submitted to MNRAS and is now available on arXiv:


This paper is also the first scientific applicaton of DISPATCH.

June 2017

The first DISPATCH methods paper has been submitted and is now available on arXiv:


February 2017

A paper led by my colleague Elishevah van Kooten on the isotopical and organic structure of the Isheyevo meteorite, and co-authored with me and others, has been published in Geochimica et Cosmochimica Acta!

Link to GCA

December 2016

A paper led by Per Bjerkeli and Matthijs van der Wiel, and co-authored by Daniel Harsono, Jes Jørgensen and myself has just been published in Nature!

(Press release) (Link to NASA ADS)

August 2016

My colleagues and I have been granted 91 million core hours on PRACE supercomputers spread across three projects (I am a collaborator on two of them).

See here for more.

April 2016

Do you like astrochemistry? Do you like astrophysical modelling?

Then maybe the KROME package would be of interest to you. I liked it enough that I became a contributor. ; )

September 2015

The semi-analytical solutions I used in this paper to benchmark 1-D radiative shock tubes are now open-source and publicly available as a Python package here.


I’ve now moved my web site to servers at the Niels Bohr Institute, the University of Copenhagen. A redirect is in place for the old web site address.


My time at ITA and in Heidelberg has come to an end.

Starting immediately, I will be working as a Postdoc at the Centre for Star and Planet Formation (STARPLAN) and the Niels Bohr Institute, within the University of Copenhagen.

I will also be moving this website to Copenhagen in the near future.