characteristic size and mass of galaxies in the bose–einstein condensate dark matter model

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ID: 193745
2016
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Abstract
We study the characteristic length scale of galactic halos in the Bose–Einstein condensate (or scalar field) dark matter model. Considering the evolution of the density perturbation we show that the average background matter density determines the quantum Jeans mass and hence the spatial size of galaxies at a given epoch. In this model the minimum size of galaxies increases while the minimum mass of the galaxies decreases as the universe expands. The observed values of the mass and the size of the dwarf galaxies are successfully reproduced with the dark matter particle mass m≃5×10−22 eV. The minimum size is about 6×10−3m/Hλc and the typical rotation velocity of the dwarf galaxies is O(H/m) c, where H is the Hubble parameter and λc is the Compton wave length of the particle. We also suggest that ultra compact dwarf galaxies are the remnants of the dwarf galaxies formed in the early universe.
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lee2016physicscharacteristic Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Jae-Weon Lee
Journal ACS chemical biology
Year 2016
DOI
10.1016/j.physletb.2016.03.016
URL
http://www.sciencedirect.com/science/article/pii/S0370269316001878
Keywords
dark matter galactic halosphysics

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