The possible differences of matter formation in the galactic galo and the galactic disk are very interesting. Is star formation in the galo still in progress? What kinds of stars are predominant? Do massive core collapsed SnIIs exist or appear in the galactic galo? All the questions are very important to me in connection with my earlier question on Li-7 origin.
Dear Martin,
I like very much your gedanken speculations, which demonstrate high level of your knowledge and creative power. Thank you.
Unfortunately, in this specific case the question is in, perhaps, different conditions in disc and halo for Li7 origin, due to different type of stars (and, therefore, different abundances of elements), different fluxes of ancient and contemporary cosmic rays, etc.
In old white dwarfs of halo Li7 is considered to be cosmological one. In which processes has its abundance grown in order of magnitude, observed in contemporary stars of disc, if Li7 is disturbed in thermonuclear reactions?
In the middle of the last century W. Fowler suggest a hypothesis on LiBeB origin in spallation reactions. I succeeded in arguing it, considering spallation reactions with shock wave accelerated particles (there are many references of my works in RG). I would like concretize this process in various galactic circumstances. I need to know, at least, the difference in types of stars in disc and halo.