What is the metallicity of the solar wind?

Answer 1

Here are some data sets from IMP-8, which had heavy ion detectors. You can do some searching for yourself to get a more accurate answer .

http://sd-www.jhuapl.edu/IMP/imp_index.html

From what I saw with a quick look through some of that data is, that heavy ions come at rates in the 10^-4 to 10^-5 (per cm^3 -- detector size ~25 cm^2) particles per day, compared with protons which come at a rate of 0.1 to 10 protons every 10 minutes (per cm^3). (Currently Spaceweather.com reports 2.7 protons/cm^3)

That would make the metallicity on the order of 0.000005%
This seems low to me, but you can have fun doing some real research with the IMP data.

According to several sources ions with Z>28 (Nickel) are extremely rare (as our sun is not an iron producer).

.

Answer 2

Hi. It is mainly hydrogen gas or ions, so not a metal in the astronomy sense.