Editorial: Special Issue on the Atomic and Molecular Processes in the Ultracold Regime, the Chemical Regime, and Astrophysics

This editorial introduces the J. Phys. B: Atomic, Molecular and Optical Physics Special Issue Atomic and Molecular Processes in the Ultracold Regime, the Chemical Regime and Astrophysics dedicated to Professor Alexander Dalgarno (1928-2015). After a brief biographical review, short summaries of the contributed papers and their relations to some of Prof. Dalgarnos work are given.