Galaxy structure with strong gravitational lensing: decomposing the internal mass distribution of massive elliptical galaxies

  title={Galaxy structure with strong gravitational lensing: decomposing the internal mass distribution of massive elliptical galaxies},
  author={James W. Nightingale and Richard J. Massey and David R. Harvey and Andrew P Cooper and Amy Etherington and Sut-Ieng Tam and Richard G. Hayes},
  journal={Monthly Notices of the Royal Astronomical Society},
We investigate how strong gravitational lensing can test contemporary models of massive elliptical (ME) galaxy formation, by combining a traditional decomposition of their visible stellar distribution with a lensing analysis of their mass distribution. As a proof of concept, we study a sample of three ME lenses, observing that all are composed of two distinct baryonic structures, a ‘red’ central bulge surrounded by an extended envelope of stellar material. Whilst these two components look… 
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