Computer simulations and theoretical models have shown that clusters of miniature galaxies, some 10- to 1,000 times smaller than the Milky Way, should exist, but proof has been elusive. Detections of dwarf galaxy clusters would provide key evidence that the current theory for how the universe evolved structures is correct.
The so-called Lambda Cold Dark Matter paradigm is the prediction that smaller things merge to form bigger things, University of Virginia astronomer Sabrina Stierwalt told Seeker. But there has been scant observational evidence of this process for low-mass galaxies despite the fact that small galaxies greatly outnumber bigger ones like the Milky Way, she added.
In paper published in this week’s Nature Astronomy, Stierwalt and colleagues describe a new hunt for dwarf galaxy clusters using data from the Sloan Digital Sky Survey. … (Seeker/Discovery)