Published on 7 May 2015

Protoplanetary disks, within which planets embryos can grow .

This is by coupling calculations on discs dynamics, thermodynamics and geometry, that a laboratory team of AIM (Astrophysics, Instrumentation, Modeling - CNRS / CEA / Université Paris Diderot) has developed a new protoplanetary disk (disk of dust and gas)model to monitor its evolution over time and thus to analyze the migration of planetary embryos.  

The researchers were able to identify favorable sites for the survival and growth of the "babies" planets, following the migration of planetary embryos possibly to be formed in such a disk. These planets embryos will accumulate in areas that, firstly, ensure their survival by preventing them from hitting their star and, secondly, promote collisions, allowing them to grow by accretion. These areas, called "planets traps" are located on the dust sublimation lines. Tracking these "planets traps" throughout the evolution of the protoplanetary disk, identifies stable areas where the planets will survive and grow, and to distinguish more ephemeral traps that retain temporarily embryos planetary.

Press release (in french).

Reference :

Time evolution of snow regions and planet traps in an evolving protoplanetary disk, K. Baillié, S. Charnoz, and E. Pantin,Astronomy & Astrophysics, 6 Mai 2015