Confirmation of the Finch Flatter-Fainter Relation for the Quadruple Images of Lensed Point Sources
arXiv:2608.17116 · doi:10.3847/2515-5172/ae9938
Abstract
Finch et al (2002) derived relations for the summed absolute magnifications of quadruply lensed images that vary inversely with flattening in two alternative isothermal gravitational potential models. However, they did not elaborate on the selection effects this "flatter-fainter'' relation induces in actual lensed systems. We test the relation against the Luhtaru et al (2021) sample of 39 quadruply lensed quasars (38 of which we model successfully), using predicted rather than observed magnifications to avoid the complication of microlensing. We found that the summed predicted magnification decreases by a factor of ten over the observed range of flattening.
3 pages. Authors' version, including Figure 1 at intended size and full resolution
References in corpus (4)
- High resolution imaging of the anomalous flux-ratio gravitational lens system CLASS B2045+265: Dark or luminous satellites?
- STRIDES: Automated uniform models for 30 quadruply imaged quasars
- What Makes Quadruply Lensed Quasars Quadruple?
- A Forward, Analytic, Differentiable, Geometric (But Inflexible) Lens Model