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Ultra-diffuse galaxies without dark matter

Authors
  • Silk, Joseph
Publication Date
Jun 19, 2019
Source
HAL-INRIA
Keywords
Language
English
License
Unknown
External links

Abstract

I develop a high velocity galaxy collision model to explain a rare but puzzling phenomenon, namely the apparent existence of ultra-diffuse galaxies with little dark matter. Predictions include simultaneous triggering of overpressured dense clouds to form luminous old globular clusters, a protogroup environment to generate high relative velocities of the initially gas-rich galaxies in the early universe, and spatially separated dark halos, possibly detectable via gravitational lensing and containing relic low metallicity stars with enhanced [alpha/Fe] at ultralow surface brightness.

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