Evidence for more dark-matter-deficient dwarf galaxies found

[Judi Lynn]

Scientists identified 19 dwarf galaxies with less dark matter.

BY
AMIT MALEWAR
DECEMBER 14, 2019



Dark matter drives the structure formation and constructs potential wells within which galaxies could form. The figure illustrates the structure in the simulated universe in a box of 200 million light years each side. It is color coded by the black, green, yellow, pink and white from low to high density regions.(Credit: NAOC)

The standard cosmological theory proposes that dark matter drives the formation of galaxies and the gravity wells in which they structure. Likewise, dwarf galaxies in the Local Group are also dominated by dark matter.

However, recently, it has been argued that not all dwarf galaxies are dominated by dark matter.

In a new study, scientists determined 19 dwarf galaxies with amounts of dark matter that do not conform to theory. The study presents a new evidence for more dark-matter-deficient dwarf galaxies.

For the study, scientists analyzed the data from the Arecibo radio telescope to calculate galactic weights by measuring how fast hydrogen moves around them. The higher the speed, the more mass a galaxy has.

More:
https://www.techexplorist.com/evidence-dark-matter-deficient-dwarf-galaxies-found/28522/?utm_source=BNA&utm_medium=BNA&utm_campaign=BNA


Images of Arecibo radio telescope:
https://tinyurl.com/ro5pvoe