Strong gravitational lensing's 'external shear' is not shear

The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power law plus 'external shear', which notionally accounts for neighbouring galaxies and cosmic shear. We show that it does not. Except in a handful of rare systems, the best-fit values...

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Veröffentlicht in:	arXiv.org 2023-11
Hauptverfasser:	Etherington, Amy, Nightingale, James W, Massey, Richard, Tam, Sut-Ieng, Cao, XiaoYue, Niemiec, Anna, He, Qiuhan, Robertson, Andrew, Li, Ran, Amvrosiadis, Aristeidis, Cole, Shaun, Diego, Jose M, Frenk, Carlos S, Frye, Brenda L, Harvey, David, Jauzac, Mathilde, Koekemoer, Anton M, Lagattuta, David J, Marceau Limousin, Mahler, Guillaume, Sirks, Ellen, Steinhardt, Charles L
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical models Complexity Dark matter Galactic evolution Galaxy distribution Gravitational lenses Hubble Space Telescope Parameters Power law Shear Space telescopes Stars & galaxies
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