They envisage it as a state of minimum energy where quantum fluctuations, consistent with the uncertainty principle of the German physicist Werner Heisenberg, can lead to the temporary formation of particle-antiparticle pairs.
The entire star is not taken in by the black hole, since much of the falling envelope of the star either rebounds from the temporary formation of a spinning neutron core or misses passing through the very centre of the core and is spun off instead.
We cannot exclude that these arcs are PBIs, and detailed examination of optical data shows temporary formation of streamers.
In Fe 18mass%Cr alloy, Cr exhibits almost the same concentration profile as Fe except for the temporary formation of a Cr5Al8 network in the early stage of heat treatment.
As a matter of fact, Sabatier not only used catalysts but also proposed the first chemical theory of catalysis based "on the temporary formation of unstable chemical compounds which, serving as intermediate steps in the reaction, determine its direction or increase its velocity".
Upon formation, it was decided that the company would be considered an ad hoc, or provisional unit, which meant it did not have a permanent lineage and was only a temporary formation, akin to a task force.
