Bulletin of the American Physical Society
APS April Meeting 2024
Wednesday–Saturday, April 3–6, 2024; Sacramento & Virtual
Session R03: New Directions and Alternative Theories
10:45 AM–12:33 PM,
Saturday, April 6, 2024
SAFE Credit Union Convention Center
Room: Ballroom A4, Floor 2
Sponsoring
Unit:
DAP
Chair: Hitesh Rahangdale, University of Tennesse, Knoxville
Abstract: R03.00006 : Spiral galaxies do not need dark matter to describe their rotational velocities
11:45 AM–11:57 AM
Presenter:
William K George
(Chalmers Technical University (Emeritus))
Authors:
William K George
(Chalmers Technical University (Emeritus))
Gunnar Johansson
(Chalmers Technical University (retired))
We also carry out an equilibrium similarity analysis and find two similarity regimes: one in which both zm and the velocities are asymptotically constant; and the other in which zm increases linearly while the velocities are power laws in r. The Triangulum Galaxy (M33) and the Milky Way show both similarity regimes. The integral equation results describe well both the shape and magnitude of the velocity measurements, even at large radius. `Velocity Mean Streamlines' computed for the Milky Way are log spirals, consistent with the equilibrium similarity analysis.
[1] George, W.K. and T.G. Johansson (2023) ``Fluid Mechanics of Isolated Spiral Galaxies'', http://www.turbulence-online.com/Publications/A_Fluid_Mechanics_Solution_Galaxy_Rotation_Problem_Oct_2023_final_Version_3LP.pdf
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700