R
R. Benton Metcalf
Researcher at University of Bologna
Publications - 108
Citations - 3466
R. Benton Metcalf is an academic researcher from University of Bologna. The author has contributed to research in topics: Dark matter & Gravitational lens. The author has an hindex of 31, co-authored 86 publications receiving 2968 citations. Previous affiliations of R. Benton Metcalf include University of California, Berkeley & INAF.
Papers
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Journal ArticleDOI
Compound Gravitational Lensing as a Probe of Dark Matter Substructure within Galaxy Halos
R. Benton Metcalf,Piero Madau +1 more
TL;DR: In this paper, the authors use numerical simulations to quantify the effect of dark matter substructure on the distribution of magnifications and find that the magnification ratio of a typical image pair will deviate significantly from the value predicted by a smooth lensing potential if, near the Einstein radius, only a few percent of the lens surface density is contained in subhalos.
Journal ArticleDOI
Flux Ratios as a Probe of Dark Substructures in Quadruple-Image Gravitational Lenses
R. Benton Metcalf,HongSheng Zhao +1 more
TL;DR: In this paper, the flux ratios of quadruple-image lensed quasars provided a powerful means of probing the small-scale structure of dark matter halos, and a family of smooth lens models can precisely predict certain combinations of flux ratios using only the positions of the images and the lens as inputs.
Proceedings ArticleDOI
Cosmology with a SKA HI intensity mapping survey
Mario G. Santos,Philip Bull,David Alonso,Stefano Camera,Pedro G. Ferreira,Gianni Bernardi,Roy Maartens,Matteo Viel,Francisco Villaescusa-Navarro,Filipe B. Abdalla,Filipe B. Abdalla,Matt J. Jarvis,Matt J. Jarvis,R. Benton Metcalf,Alkistis Pourtsidou,Laura Wolz +15 more
TL;DR: Advancing Astrophysics with the Square Kilometre Array (SKEA) as mentioned in this paper June 8-13, 2014======Giorgini Naxos, Italy, USA
Journal ArticleDOI
Detecting dark matter substructure spectroscopically in strong gravitational lenses
TL;DR: In this paper, a method for searching for substructure in the haloes of gravitational lenses that produce multiple images of QSOs, such as 4-image Einstein Cross lenses, is presented.
Journal ArticleDOI
Detecting dark matter substructure spectroscopically in strong gravitational lenses
TL;DR: In this paper, a method for searching for substructure in the haloes of gravitational lenses that produce multiple images of quasi-stellar objects (QSOs), such as four-image Einstein Cross lenses, is presented.