2023/03/06 by Jau Tang, Qiang Tang, Tang, Jau +1
Physics and Astronomy · Computer Science · #Experimental and Theoretical Physics Studies #Scientific Research and Discoveries #Computational Physics and Python Applications
paper · pdf · doi:10.48550/arxiv.2303.02811
Dark matter has been a long-standing and important issue in physics, but direct evidence of its existence is lacking. This work aims to elucidate the mystery and show that the dark matter hypothesis is unnecessary. We can nicely reproduce the observed rotation curves using only conventional Newtonian dynamics based on experimental surface brightness profiles of several galaxies. Our success is based on realizing that the mass radial distribution follows a stretched exponential decay with a small exponent over a few hundred kiloparsecs. Our quantitative analysis indicates that for these four example galaxies, there is no need to invoke the hypothetical dark matter presently unknown to humans or the modified Newtonian dynamics (MOND) paradigm.