My question is relatively straightforward: Do we know if satellite/ dwarf galaxies contain the same proportion of dark matter to ordinary matter as "regular" sized galaxies?
The Milky Way, for instance, is estimated to be surrounded by about 50 such dwarf/satellites, most of them relatively tiny, weighing roughly 10,000 times less than the Milky Way, with some containing only a few thousand stars.
Seen by the Atacama Large Millimetre/sub-millimetre Array (ALMA), the Einstein Ring shows the smeared light of a distant star-forming galaxy that existed at a time when the Universe was just two billion years old. Its light is being magnified and bent into a ring by a huge foreground galaxy four billion light years away from us, whose mass is bending space and hence the path that the light of the lensed star-forming galaxy is taking to reach us.
I appreciate that satellite galaxies are harder to discover in the first place, and that probably the techniques to determine the amount of dark matter, such as gravitional lensing, are much more difficult to carry out.
I don't have any definite reason to think that the dark matter proportions should be different, and I ask this purely out of curiosity and the assumption that satellite galaxies are older and that therefore differences in dark matter proportions may tell us more about the early universe.