It has been shown by Simmons, Newsam & Willis (1995) (hereafter SNW95) that microlensing of stars can produce a distinctive and significant polarisation signature, even for lensed stars with no net unamplified polarisation. In this contribution, we use the model developed in SNW95 to simulate a series of realistic observations of microlensing events. We use these simulations to examine how much...

Abstract. From the analysis of measurements of the linear polarisation of visible light coming from quasars, the existence of large-scale coherent orientations of quasar polarisation vectors in some regions of the sky has been reported. Here, we show that this can be explained by the mixing of the incoming photons with nearly massless pseudoscalar (axion-like) particles in extragalactic magneti...

The photoreceptor design of crustaceans, often containing regular arrays of intrinsically polarisation-sensitive microvilli, has had a profound influence on the visual biology of this subphylum. The land-based arthropods (insects and arachnids) also construct photoreceptors from ordered microvilli; however while in many species polarisation sensitivity results, a general overview of these group...

• Polarisation hinders both growth and human development • Measuring income polarisation provides a distinct insight into the link between growth and human development • Policy recommendations based on polarisation measures will differ from those based on conventional inequality measures, and are likely to be more nuanced S everal countries, particularly in Asia, have seen soaring economic grow...

The Hα-line intensity, linear and circular impact polarisation were calculated during the impulsive phase of flares using the density matrix approach. Depolarising effects of diffusive radiation and collisions with thermal electrons are considered for a 3 levels Hydrogen model atom with Zeeman splitting in weak and intermediate magnetic fields. Electron beam energy and angular distributions in ...

We compare two rotationally invariant decomposition techniques on linear polarisation data: the spin-2 spherical harmonic decomposition in two opposite parities, the Eand B-mode, and the multiscale analysis of the gradient of linear polarisation, |∇P |. We demonstrate that both decompositions have similar properties in the image domain and the spatial frequency domain. They can be used as compl...