The Innermost Mass Distribution of the Gravitational Lens SDP.81 from ALMA Observations

@article{Wong2015TheIM,
  title={The Innermost Mass Distribution of the Gravitational Lens SDP.81 from ALMA Observations},
  author={K. Wong and S. Suyu and Satoki Matsushita Institute of Astronomy and Astrophysics and A. Sinica},
  journal={arXiv: Astrophysics of Galaxies},
  year={2015}
}
The central image of a strongly lensed background source places constraints on the foreground lens galaxy's inner mass profile slope, core radius and mass of its nuclear supermassive black hole. Using high-resolution long-baseline Atacama Large Millimeter/submillimeter Array (ALMA) observations and archival $Hubble~Space~Telescope$ ($HST$) imaging, we model the gravitational lens H-ATLAS J090311.6+003906 (also known as SDP.81) and search for the demagnified central image. There is central… Expand
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