Concept

Gravité de surface

Publications associées (28)

Tracing the formation of the Milky Way through ultra metal-poor stars

Pascale Jablonka, Nicolas Lawrence Etienne Longeard

We use Gaia DR2 astrometric and photometric data, published radial velocities and MESA models to infer distances, orbits, surface gravities, and effective temperatures for all ultra metal-poor stars ([Fe/H] < -4.0 dex) available in the literature. Assuming ...

OXFORD UNIV PRESS2019

The Pristine survey - V. A bright star sample observed with SOPHIE

Pascale Jablonka, Carmela Lardo

With the aim of probing the properties of the bright end of the Pristine survey and its effectiveness in selecting metal-poor stars, we selected a sample of bright candidate metal-poor stars combining Pristine CaHK photometry with APASS gi photometry, befo ...

OXFORD UNIV PRESS2019

Mass loss of density currents travelling over pourous bed

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Sara Venuleo

Polluted liquids leaking from their storages over the surrounding gravel beds or oil spilling into aquifers, are examples of gravity currents moving over a porous terrain. Density-driven flows provoked by saline or temperature differences or turbidity curr ...

2019

Local radiation maxima in snow-covered mountains and its influence on PV winter production

Michael Lehning, Jérôme François Sylvain Dujardin, Annelen Kahl, Felix Andreas Von Rütte

Mountains receive increased solar radiation because of a thinner atmosphere, the presence of snow on the ground and – in many regions such as the Alps – decreased winter cloudiness. In complex terrain, multiple terrain scattering further leads to radiation ...

2019

Local surface mass balance processes in East Antarctica

Varun Sharma, Michael Lehning, Wolf Hendrik Huwald, Nander Wever, Francesco Comola, Eric Sauvageat

In Antarctica, direct observations of key processes shaping the surface mass balance such as precipitation and snow deposition, wind transport of snow, and sublimation, are sparse due to the extreme environment and related difficulties in measuring the var ...

2018

Local snow transport and surface evolution processes in East Antarctica

Varun Sharma, Michael Lehning, Wolf Hendrik Huwald, Nander Wever, Francesco Comola, Eric Sauvageat, Philip Crivelli

In Antarctica, direct measurements of processes shaping the surface mass balance such as precipitation, accumulation and erosion, drifting and blowing snow, and sublimation, are sparse and challenging due to the extreme environment and related difficulties ...

2018

Virtual Zero Gravity Impact on Internal Gravity Model

Ronan Boulic, Bruno Herbelin, Elisa Canzoneri

This project investigates the impact of a virtual zero gravity experience on the human gravity model. In the planned experiment, subjects are immersed with HMD and full body motion capture in a virtual world exhibiting either normal gravity or the apparent ...

Ieee Computer Soc2017

The formation of the Milky Way halo and its dwarf satellites; a NLTE-1D abundance analysis

Pascale Jablonka, Pierre North

We present a homogeneous set of accurate atmospheric parameters for a complete sample of very and extremely metal-poor stars in the dwarf spheroidal galaxies (dSphs) Sculptor, Ursa Minor, Sextans, Fornax, Botes I, Ursa Major II, and Leo IV. We also deliver ...

Edp Sciences S A2017

Water Oxidation Kinetics of Accumulated Holes on the Surface of a TiO2 Photoanode: A Rate Law Analysis

Florian Le Formal, Yimeng Ma, Min Ling

It has been more than 40 years since Fujishima and Honda demonstrated water splitting using TiO2, yet there is still no clear mechanism by which surface holes on TiO2 oxidize water. In this paper, we use a range of complementary techniques to study this re ...

Amer Chemical Soc2017

Bed shear stress estimation for gravity currents performed in laboratory

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Jessica Zordan

Gravity currents are caused by density differences between two fluids which may be due to temperature, dissolved substances or the presence of particles in suspension. In this study saline currents, in which the higher density is produced by dissolved salt ...

2016

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