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Galaxies In More Crowded Environments Rotate Slower: Implications For Gravity

25 Mar 2021, 15:36 UTC
Galaxies In More Crowded Environments Rotate Slower: Implications For Gravity
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This guest post was written by Indranil Banik, a Humboldt postdoctoral research fellow at the University of Bonn. Indranil works on a variety of tests exploring whether gravity in the weak field regime follows the Milgromian rather than the Newtonian law, which seems very likely given current evidence, and also tests the related hypothesis of galaxies having their own dark matter halos. My work is accessible through ORCID (identifier 0000-0002-4123-7325).Title: Testing the Strong Equivalence Principle: Detection of the External Field Effect in Rotationally Supported GalaxiesAuthors: Kyu-Hyun Chae, Federico Lelli, Harry Desmond, Stacy S. McGaugh, Pengfei Li, and James M. SchombertFirst Author’s Institution: Sejong University, Seoul, Republic of KoreaStatus: Accepted to ApJ, open access on arxivWe’ve all heard the story of how an apple supposedly fell on Newton’s head and inspired him to write down ideas about gravity. Newton proposed that gravity is an invisible force that holds objects like the Earth and Moon in place. Little did he know, he was actually missing some pieces. Albert Einstein came along in the early 20th century and revolutionized the world with his idea that the force of gravity is actually the result of the curvature of an invisible fabric called spacetime, an ...

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