Dark Matter under the Microscope: Constraining Compact Dark Matter with Caustic Crossing Events

@article{Diego2018DarkMU,
  title={Dark Matter under the Microscope: Constraining Compact Dark Matter with Caustic Crossing Events},
  author={Jose M. Diego and Nick Kaiser and Tom Broadhurst and Patrick L. Kelly and Steven A. Rodney and Takahiro Morishita and Masamune Oguri and Timothy W. Ross and Adi Zitrin and Mathilde Jauzac and Johan Richard and Liliya L.R. Williams and J. Vega and Brenda Frye and Alexei V. Filippenko},
  journal={The Astrophysical Journal},
  year={2018},
  volume={857},
  pages={25}
}
A galaxy cluster acts as a cosmic telescope over background galaxies but also as a cosmic microscope magnifying the imperfections of the lens. The diverging magnification of lensing caustics enhances the microlensing effect of substructure present within the lensing mass. Fine-scale structure can be accessed as a moving background source brightens and disappears when crossing these caustics. The recent discovery of a distant lensed star near the Einstein radius of the galaxy cluster MACSJ1149.5… 
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The Universe at extreme magnification
  • J. Diego
  • Physics
    Astronomy & Astrophysics
  • 2019
Extreme magnifications of distant objects by factors of several thousand have recently become a reality. Small, very luminous compact objects, such as supernovae (SNe), giant stars at z = 1 − 2, Pop
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Two peculiar fast transients in a strongly lensed host galaxy
A massive galaxy cluster can serve as a magnifying glass for distant stellar populations, as strong gravitational lensing magnifies background galaxies and exposes details that are otherwise
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