Garrelt Mellema

TL;DR: In this article, the evolution of spherical planetary nebulae is followed using a radiation-gasdynamics code, while taking into account the central star and the fast wind.

TL;DR: In this paper, the physics of the formation of planetary nebulae around low mass WR stars, or [WR] stars, are discussed and the differences which can be expected due to the differentcharacter of the fast winds from these [WR]-stars.

TL;DR: In this paper, the dynamics of stellar wind bubbles around hydrogen-deficient stars using numerical simulations with time and ion dependent cooling was studied, and it was shown that for the planetary nebulae, the different cooling properties of the hydrogen deficient wind lead to a later transition from momentum-to energy-driven flow.

TL;DR: In this article, the authors argue for the development of new technologies enabling interferometers to be deployed, in space (e.g. Earth-Sun L2) or in the lunar vicinity (i.e. surface, orbit or Earth-Moon L2), to target this 21-cm signal.

TL;DR: In this article, the authors studied the impact of the eccentricity of the gas disc on the encounter velocities of the objects in the circumprimary gas disc and found that the encounter velocity between objects of different sizes strongly depends on the gas disk eccentricity.