Concept
Celestial sphere
Related publications (23)
Where is M-theory in the space of scattering amplitudes?
We use the S-matrix bootstrap to carve out the space of unitary, analytic, crossing symmetric and supersymmetric graviton scattering amplitudes in nine, ten and eleven dimensions. We extend and improve the numerical methods of our previous work in ten dime ...
SPRINGER2023Gaia Focused Product Release: Asteroid orbital solution: Properties and assessment
Stephan Morgenthaler, Shuangqing Liao
Context. We report the exploitation of a sample of Solar System observations based on data from the third Gaia Data Release (Gaia DR3) of nearly 157 000 asteroids. It extends the epoch astrometric solution over the time coverage planned for the Gaia DR4, w ...
Les Ulis Cedex A2023Operando identification of a side-on nickel superoxide intermediate and the mechanism of oxygen evolution on nickel oxyhydroxide
Xile Hu, Lichen Bai, Seunghwa Lee
The oxygen evolution reaction (OER) is a key electrochemical reac-tion relevant to energy storage. Ni-containing bimetallic oxyhydrox-ides are among the most active OER catalysts in alkaline medium, but the mechanism of OER on pure Ni oxyhydroxide remains ...
ELSEVIER2023Use of space analog missions as an educational tool in primary schools
Space exploration is a field that inspires a wide range of people, from children to university students, including the general public. With a return to the Moon planned for 2024 and the rapid expansion of the private industry, educating the next generation ...
PERGAMON-ELSEVIER SCIENCE LTD2022Precision Positioning of Microrobots for Multi-Object Spectrographs
How does one study the evolution of the Milky Way, or the expansion of the Universe, or explore the mysteries of Dark energy? To investigate these complex topics, astronomers require data, and a great deal of it, in the form of the spectra of stars, galaxi ...
EPFL2020Secular effects of ultralight dark matter on binary pulsars
Sergey Sibiryakov, Diego Blas Temino
Dark matter (DM) can consist of very light bosons behaving as a classical scalar field that experiences coherent oscillations. The presence of this DM field would perturb the dynamics of celestial bodies, either because the (oscillating) DM stress tensor m ...
AMER PHYSICAL SOC2020Graph Spectral Clustering of Convolution Artefacts in Radio Interferometric Images
Paul Hurley, Matthieu Martin Jean-André Simeoni
The starting point for deconvolution methods in radioastronomy is an estimate of the sky intensity called a dirty image. These methods rely on the telescope point-spread function so as to remove artefacts which pollute it. In this work, we show that the in ...
IEEE2019A Light Pollution Simulator
Denis Gillet, Juan Carlos Farah
In the framework of the Dark Skies Rangers project, we have developed a light pollution simulator aimed at demonstrating the impact of artificial light on the observation of the night sky. The simulator illustrates a nocturnal countryside scenery, with a h ...
2019Enantioselective C-H Bond Functionalizations by 3d Transition-Metal Catalysts
Direct catalytic modifications of carbon-hydrogen (C-H) bonds, ubiquitous in organic molecules, represent a powerful strategy in organic synthesis. In the past decade, chemists have focused on the development of sustainable methods for functionalization of ...
ELSEVIER2019Discontinuous Galerkin scheme for the spherical shallow water equations with applications to tsunami modeling and prediction
Jan Sickmann Hesthaven, Boris Bonev
We present a novel high-order discontinuous Galerkin discretization for the spherical shallow water equations, able to handle wetting/drying and non-conforming, curved meshes in a well-balanced manner. This requires a well-balanced discretization, that can ...
2018