actually hull found hot matter, oxygen and hydrogen atoms which ionized due to gravitation when the very first galaxies were formed in lyman-beta forests. Not much, of course, but these atoms were then plugged into models he developed, and from these models he can guess how much matter is near the hot atoms. This is all ordinary matter, atoms protons, stuff we know. It's an interesting way to look for ordinary matter, instead of looking down in the low wavelengths like in the lyman spectral lines like we usually do, he's looking in higher frequencies for hot atoms in deep space near places where galaxies first formed.
(no subject)
Date: 2008-05-20 11:59 pm (UTC)(no subject)
Date: 2008-05-21 05:56 am (UTC)(no subject)
Date: 2008-05-21 11:56 am (UTC)