On the role of cosmic mass in understanding the relationships among galactic dark matter, visible matter and flat rotation speeds

ABSTRACT With reference to our recently proposed Planck Scale White Hole Cosmology (PS-WHC) (Seshavatharam et al. 2021) or Flat Space Cosmology (PS-FSC) (Tatum et al. 2015), we make an attempt to quantify galactic dark matter and flat rotation speeds in terms of galactic visible matter and cosmic mass. Considering recently observed dwarf galaxies having very little dark matter and assuming a time-dependent reference mass unit of we suggest an empirical relation for galactic dark matter via galactic visible mass as, This relation helps in fitting flat rotation speeds starting from 8 km/sec (for Segue-2) to 500 km/sec (for UGC12591). Following the Modified Newtonian Dynamics and understanding galactic flat rotation speed relation with Hubble mass of the universe, ratio of galactic flat rotation speed to speed of light can be shown to be approximately Considering the sum of galactic dark matter and visible matter, ratio of galactic flat rotation speed to speed of light can be shown to be approximately With further study, dark matter’s nature, effect and distribution can be understood in terms of visible matter’s extended gravity and extended theories of gravity can be understood with “distance cosmic mass” rather than the empirical “minimum acceleration”.