Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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QUADRUPLY-IMAGED QUASARS: SOME GENERAL FEATURES

  • Tuan-Anh, P. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Thai, T.T. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Tuan, N.A. (University of Science and Technology of Hanoi (USTH), VAST) ;
  • Darriulat, P. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Diep, P.N. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Hoai, D.T. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Ngoc, N.B. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Nhung, P.T. (Department of Astrophysics, Vietnam National Space Center, VAST) ;
  • Phuong, N.T. (Department of Astrophysics, Vietnam National Space Center, VAST)
  • Received : 2020.09.04
  • Accepted : 2020.11.24
  • Published : 2020.12.31
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Abstract

Gravitational lensing of point sources located inside the lens caustic is known to produce four images in a configuration closely related to the source position. We study this relation in the particular case of a sample of quadruply-imaged quasars observed by the Hubble Space Telescope. Strong correlations between the parameters defining the image configuration are revealed. The relation between the image configuration and the source position is studied. Some simple features of the selected data sample are exposed and commented upon. In particular, evidence is found for the selected sample to be biased in favor of large magnification systems. While having no direct impact on practical analyses of specific systems, our results have pedagogical value and deepen our understanding of the mechanism of gravitational lensing.

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