A5047416485- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Plant Water Relations and Carbon Dynamics
- Advanced Vision and Imaging
- 2D Materials and Applications
- Species Distribution and Climate Change
- MXene and MAX Phase Materials
- Boron and Carbon Nanomaterials Research
University of Zurich
2013-2021
We describe Space Warps, a novel gravitational lens discovery service that yields samples of high purity and completeness through crowd-sourced visual inspection. Carefully produced colour composite images are displayed to volunteers via web- based classification interface, which records their estimates the positions candidate lensed features. Images simulated lenses, as well real lack inserted into image stream at random intervals; this training set is used give instantaneous feedback on...
We report the discovery of 29 promising (and 59 total) new lens candidates from Canada–France–Hawaii Telescope Legacy Survey (CFHTLS) based on about 11 million classifications performed by citizen scientists as part first Space Warps search. The goal blind search was to identify missed robots (the ringfinder galaxy scales and arcfinder group/cluster scales) which had been previously used mine CFHTLS for lenses. compare some properties samples detected these algorithms sample find them be...
We develop a method to enable collaborative modelling of gravitational lenses and lens candidates, that could be used by non-professional enthusiasts. It uses an existing free-form program (glass), but enables the input this code provided in novel way, via user-generated diagram is essentially sketch arrival-time surface. report on implementation method, SpaghettiLens, which has been tested challenge using 29 simulated drawn from larger set created for Space Warps citizen science strong...
We report modelling follow-up of recently discovered gravitational-lens candidates in the Canada France Hawaii Telescope Legacy Survey. Lens was done by a small group specially interested volunteers from Space Warps citizen–science community who originally found candidate lenses. Models are categorized according to seven diagnostics indicating (a) image morphology and how clear or indistinct it is, (b) whether mass map synthetic lensed appear be plausible, (c) lens-model compares with...
Abstract not Available.
Fossil groups are considered the end product of natural galaxy group evolution in which members sink towards centre gravitational potential due to dynamical friction, merging into a single, massive, and X-ray bright elliptical. Since lensing depends on mass foreground object, its concentration, distance observer, we can expect effects such fossil be particularly strong. This paper explores exceptional system $\mathrm{J}143454.4+522850$. We combine with stellar population-synthesis separate...