The Virgo Consortium



Hot “bubbles” in the IGM that develop as a result of impinging galactic winds. These bubbles are filled with gas with temperatures up to 10^6 K, as seen in this projected mass-weighted temperature map.


GADGET computes gravitational forces with a hierarchical tree algorithm (optionally in combination with a particle-mesh scheme for long-range gravitational forces) and represents fluids by means of smoothed particle hydrodynamics (SPH).

The code can be used for studies of isolated systems, or for simulations that include the cosmological expansion of space, both with or without periodic boundary conditions. In all these types of simulations, GADGET follows the evolution of a self-gravitating collisionless N-body system, and allows gas dynamics to be optionally included. Both the force computation and the time stepping of GADGET are fully adaptive, with a dynamic range which is, in principle, unlimited.

Time evolution of a galaxy merger over a period of 2 billion years. Only the gas distribution is shown, where brightness increases with gas density while the color hue encodes the gas temperature, from blue/cold to yellow/hot.


The initial paper for “The GADGET code” has been published as Springel et al. 2001. For more information and relevant publications please visit MPA’s project description page or contact Volker Springel.