Astronomers have detected darkish matter clumps round large- and medium-sized galaxies. Now, utilizing Hubble and a brand new observing approach, astronomers have discovered that darkish matter kinds a lot smaller clumps than beforehand recognized. Phys.Org stories: The researchers looked for small concentrations of darkish matter within the Hubble information by measuring how the sunshine from faraway quasars is affected because it travels by house. Quasars are the intense black-hole-powered cores of very distant galaxies. The Hubble photos present that the sunshine from these quasars photos is warped and magnified by the gravity of huge foreground galaxies in an impact referred to as gravitational lensing. Astronomers used this lensing impact to detect the small darkish matter clumps. The clumps are positioned alongside the telescope’s line of sight to the quasars, in addition to in and across the foreground lensing galaxies.
Utilizing NASA’s Hubble House Telescope and a brand new observing approach, astronomers have discovered that darkish matter kinds a lot smaller clumps than beforehand recognized. This end result confirms one of many elementary predictions of the broadly accepted “chilly darkish matter” principle. All galaxies, in response to this principle, type and are embedded inside clouds of darkish matter. Darkish matter itself consists of slow-moving, or “chilly,” particles that come collectively to type buildings starting from a whole lot of hundreds of occasions the mass of the Milky Approach galaxy to clumps no extra huge than the heft of a industrial airplane. (On this context, “chilly” refers back to the particles’ velocity.) The Hubble statement yields new insights into the character of darkish matter and the way it behaves.
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