The SWELLS survey – II. Breaking the disc–halo degeneracy in the spiral galaxy gravitational lens SDSS J2141−0001

  title={The SWELLS survey – II. Breaking the disc–halo degeneracy in the spiral galaxy gravitational lens SDSS J2141−0001},
  author={Aaron A Dutton and Brendon J. Brewer and P J Marshall and Matthew W. Auger and Tommaso Treu and David C. Koo and Adam S. Bolton and Bradford Holden and L{\'e}on V. E. Koopmans},
  journal={Monthly Notices of the Royal Astronomical Society},
The degeneracy among the disc, bulge and halo contributions to galaxy rotation curves prevents an understanding of the distribution of baryons and dark matter in disc galaxies. In an attempt to break this degeneracy, we present an analysis of the strong gravitational lens SDSS J2141-0001, discovered as part of the Sloan Lens ACS survey. The lens galaxy is a high-inclination, disc-dominated system. We present new Hubble Space Telescope multicolour imaging, gas and stellar kinematics data derived… 
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