# What is the composition of the Solar Wind?

Is the composition of the Solar Wind known? I'm especially interested in the heavy metals present. Most accounts deny the existence of anything other than electrons, protons, and some alpha particles; but it seems to me that if we can identify most of the known elements in the Sun's photosphere, then they are likely to exist in the Solar Wind at some concentration. If not, what is the detection limit (ppm? ppb? ppt?) we have so far established? Have any limits been established for atom clusters (dust?)? As a secondary question, I guess that (neutral) hydrogen and (negative hydride) H(-) do not exist in the solar wind due to its temperature being too high. Is this correct, and if so, is it true throughout the heliosphere or does the solar wind cool enough for the formation of bound species?

• Just to clarify: wanted to make sure you're aware that stars can't produce elements larger than $Fe$ (only supernovas can) – Carl Witthoft Sep 19 '16 at 19:03

Additionally, there actually is some neutral hydrogen, both in the solar wind and the solar atmosphere (see Olsene et al. (2004) and Collier et al. (2001)). It should be present in the corona, and can be detected and modeled by Lyman $\alpha$ scattering. It was also detected and studied by the Low Energy Neutral Atom (LENA) imager on IMAGE.