Department of Space

Flying through the plasmasphere to optimize low-energy ion measurements

The Juice flyby of Earth in August 2024 gave us the first chance to evaluate the performance of the Jovian Plasma Dynamics and Composition analyzer (JDC) in environments similar to those expected at Jupiter. JDC is one of the sensors belonging to the Particle Environment Package...

Rapid increase of climate extremes reveals new areas of concern in Amazonia

Abstract Amazonia is highly sensitive to climate extremes, yet we lack an Amazon-wide assessment that examines the spatial-temporal changes in these extreme conditions. We address this within seasons and across the hydrological year, using a quantiles approach that integrates the...

UAV-Satellite Integration Reveals Continuous Methane Emission Variability from Chinese Coal Mine Ventilation Shafts

Abstract Satellite quantification of coal mine methane lacks validation for continuously operating ventilation systems with high temporal variability. We integrate 75 unmanned aerial vehicle (UAV) flights (30 successful, 13 days) with 6.5 years of satellite observations at a Chin...

Non-isothermal vertical distribution functions for the Milky Way

Abstract The vertical structure of our Galaxy has commonly been assumed to follow a pseudo-isothermal distribution. However, there is no a priori reason to expect this form to arise from scattering by giant molecular clouds (GMCs), since GMCs are confined to a narrow layer around...

Spin-disc misalignment drives periodic accretion and pulse profile asymmetry in X-ray pulsars

Abstract We investigate magnetospheric accretion in disc-fed X-ray pulsars assuming that the neutron star spin axis is not perpendicular to the disc plane. We focus on X-ray pulsars, where a geometrically thin disc is truncated far from the stellar surface the channelled part of...

High-EfficiencyFiber Laser Generating up to 528th-OrderOrbital Angular Momentum Light

Abstract Structured light lasers carrying orbital angular momentum (OAM) have demonstrated considerable potential across diverse research fields and practical applications. Despite great progress in exploring this new degree of freedom of light, it remains challenging to achieve...

Assessment of environmentally suitable sites for solid waste sanitary landfill using analytical hierarchy process (AHP) and GIS in Uyo and environs, South-South Nigeria

Abstract Rapid urban growth in the Global South makes it harder to choose infrastructure corridors, especially in sensitive coastal basins. This study introduces a spatial decision-support framework tailored to local conditions. It combines the Delphi technique, Analytical Hierar...

Defect Landscapeand Stability of High-Entropy Carbides

Abstract High-entropy carbides (HECs) can be stabilized as single-phase solid-solution microstructures by kinetically trapping a “high-entropy state” under ambient conditions; however, such microstructures may represent metastable states rather than true thermodynamic equilibrium...