2009

Improved Constraints on the Gravitational Lens Q0957+561. II. Strong Lensing

Fadely, Ross, Keeton, Charles R., Nakajima, Reiko et al.

Understand

We present a detailed strong lensing analysis of an HST/ACS legacy dataset for the first gravitational lens, Q0957+561.

  • With deep imaging we identify 24 new strongly lensed features, which we use to constrain mass models.
  • We model the stellar component of the lens galaxy using the observed luminosity distribution, and the dark matter halo using several different density profiles.
  • We draw on the weak lensing analysis by Nakajima et al.

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