As Einstein wrote: "It seems as though we must use sometimes the one theory and sometimes the other, while at times we may use either. We are faced with a new kind of difficulty. We have two contradictory pictures of reality; separately neither of them fully explains the phenomena of light, but together they do"
Einstein, as it turns out, was quite the philosopher. The conclusion that he came up with, is today known as Wave-Particle Duality. In simple terms, he said light (which is a form of energy) exists as a wave, but also as particles. And as we know from his mass- energy equation, it is safe to say that matter exists in two forms - as wave and as particle.
What i'm trying to say is - Every atom in your body, oscillates among a mean point, and therefore has a certain vibration and frequency. Of course this frequency is negligible when considering a mass as large as a person's (some being larger than others). That is to say, that it is negligible considering our sensory limitations as human beings; but it is there nonetheless. If you add to this - the fact that every memory, thought, idea and experience that we have, is stored in our mind in the form of memory proteins; proteins which are made up of amino acids, held together by individual bonds; each bond being associated with a certain amount of energy - we might have a new possibility surfacing.
Conventionally, an aura is defined as "the distinctive atmosphere or quality that seems to surround and be generated by a person, thing, or place."
Instead, Consider this alternative - What if an aura, is the cumulative sum of all the physical energy that is associated with the atoms in our body; along with the energy associated with every thought and memory in our mind - a gross, perceptible representation of our entire being and existence?
As human beings, we're limited by our range of senses, but that doesn't dismiss the possibility that each of us has a certain energy associated with us, and it's not just something hippies talk about. Rather it could be a very real, scientific
phenomenon.
Think about it.