Dark Matter Q

I dont know much about the research done on this dark matter... all I know
its elusive, there is indirect evidence of it, and its what holds galaxies
together... is it possible that this dark matter could be like a white dwarf
except completely cooled down so its one big chunk of 'metals'? This could
be why we cant see them as they are not glowing at all, they would be the
same temperature (or near enough) to space itself and thats why our infrared
telescopes haven't seen them... (or have we seen things that aren't hot or
bright?) however they would have to be substantially small, relatively, that
they wouldn't be detected when they pass our line of sight... I'm thinking
it would be fairly small stars with a short life span... just a thought...

Niko