an object that has an excess of electrons has space charge.
what kind of charge does an object that has an excess of electrons have?
space charge
if a body has more or fewer electrons than are required to balance the positive charge of the nuclei, then that object has a net electric charge. when there is an excess of electrons, the object is said to be negatively charged. when there are fewer electrons than the number of protons in nuclei, the object is said to be positively charged. when the number of electrons and the number of protons are equal, their charges cancel each other and the object is said to be electrically neutral. a macroscopic body can develop an electric charge through rubbing, by the triboelectric effect.
electron
in november 2008, researchers published in "nature" the finding of a surplus of high energy electrons. during a 5-week observatory period in 2000 and 2003, atic counted 70 electrons with energies in the range 300-800 gev; these electrons were in excess of those expected from the galactic background. the source of these electrons is unknown, but it is assumed to be relatively close, no more than about 3000 lightyears away, since high energy electrons rapidly lose energy as they travel through the galactic magnetic field and collide with photons. the electrons could originate from a nearby pulsar or other astrophysical object, but the researchers were not able to identify a fitting object. according to another conjecture, the electrons result from collisions of dark matter particles, for example wimp kaluza-klein particles of mass near 620 gev.
advanced thin ionization calorimeter