Scientists Find the ‘Missing’ Dark Matter from the Early Universe
Dark matter, it seems, has been clinging to galaxies for a very long time. Most galaxies that existed 10 billion years ago had about as much dark matter as galaxies do today, contradicting earlier studies that suggested less dark matter lurked around galaxies in the early universe.more…
Tau.Neutrino said:
Scientists Find the ‘Missing’ Dark Matter from the Early Universe Dark matter, it seems, has been clinging to galaxies for a very long time. Most galaxies that existed 10 billion years ago had about as much dark matter as galaxies do today, contradicting earlier studies that suggested less dark matter lurked around galaxies in the early universe.more…
I wonder how it coalesces around a galaxy, does it form the structure of a galaxy in combination with the central blackhole, do galaxies form around dark matter concentrations
Cymek said:
Tau.Neutrino said:
Scientists Find the ‘Missing’ Dark Matter from the Early Universe Dark matter, it seems, has been clinging to galaxies for a very long time. Most galaxies that existed 10 billion years ago had about as much dark matter as galaxies do today, contradicting earlier studies that suggested less dark matter lurked around galaxies in the early universe.more…
I wonder how it coalesces around a galaxy, does it form the structure of a galaxy in combination with the central blackhole, do galaxies form around dark matter concentrations
From link “The Shapes of the Rotation Curves of Star-forming Galaxies Over the Last ≈10 Gyr”.
https://arxiv.org/format/1811.05982
“paper we exploit integral field spectroscopy ob-
servations of nebular emission from a sample of ≈1500 star-
forming galaxies spanning 0.6 < z < 2.2, along with ob-
servations of extended Hi emission from local galaxies,”
That’s the way to do it. Not so easy because of the small angular diameters out that far away. But hydrogen alpha observing telescopes have an angular resolution as good as Hubble, if not better.