Results 51 to 60 of about 5,898 (199)

Electron Heating in 2D Particle-in-cell Simulations of Quasi-perpendicular Low-beta Shocks

The Astrophysical Journal
We measure the thermal electron energization in 1D and 2D particle-in-cell simulations of quasi-perpendicular, low-beta ( β _p = 0.25) collisionless ion–electron shocks with mass ratio m _i / m _e = 200, fast Mach number ${{ \mathcal M }}_{\mathrm{ms}}=1$
Aaron Tran, Lorenzo Sironi
doaj   +1 more source

Observations of the spatial and temporal structure of field-aligned beam and gyrating ring distributions at the quasi-perpendicular bow shock with Cluster CIS [PDF]

Annales Geophysicae, 2001
During the early orbit phase, the Cluster spacecraft have repeatedly crossed the perpendicular Earth’s bow shock and provided the first multi-spacecraft measurements. We have analyzed data from the Cluster Ion Spectrometry experiment (CIS), which
E. Möbius, H. Kucharek, C. Mouikis, E. Georgescu, L. M. Kistler, M. A. Popecki, M. Scholer, J. M. Bosqued, H. Rème, C. W. Carlson, B. Klecker, A. Korth, G. K. Parks, J. C. Sauvaud, H. Balsiger, M.-B. Bavassano-Cattaneo, I. Dandouras, A. M. DiLellis, L. Eliasson, V. Formisano, T. Horbury, W. Lennartsson, R. Lundin, M. McCarthy, J. P. McFadden, G. Paschmann   +25 more
doaj   +1 more source

From wild to tamed: Reimagining novel crops through omics and local plant diversity

PLANTS, PEOPLE, PLANET, EarlyView.
The global food system faces growing pressure from climate change, biodiversity loss, and rising nutritional demands. Agriculture has increased yields but reduced crop diversity, flavor, and nutritional quality, leaving societies vulnerable and dependent on a narrow set of staple species.
Alexandra Sanfeliu Meliá, Pablo D. Cárdenas   +1 more
wiley   +1 more source

Shock formation around planets orbiting M-dwarf stars

, 2011
Bow shocks can be formed around planets due to their interaction with the coronal medium of the host stars. The net velocity of the particles impacting on the planet determines the orientation of the shock. At the Earth's orbit, the (mainly radial) solar
Fossati, Fossati, Hebb, Kasting, Lai, Llama, Parker, Schlaufman, Vidotto, Vidotto, Vidotto   +10 more
core   +2 more sources

Assessing National Sustainability Transitions in Europe: A Dynamic MCDA and Clustering‐Based Approach

Sustainable Development, EarlyView.
ABSTRACT The study evaluates the sustainable development of 42 European countries using a multi‐criteria decision analysis (MCDA) approach, based on 29 indicators covering the economic, social, and environmental pillars. All three pillars are assessed both individually and in consolidated form to provide a comprehensive view of countries ...
Una Smailbegovic, Džana Kadric, Edin Kadric, Simon Glöser Chahoud   +3 more
wiley   +1 more source

Mach Number Scaling of Foreshock Magnetic Fluctuations at Quasi-parallel Bow Shocks and Their Role in Magnetospheric Driving Throughout the Solar System

The Astrophysical Journal
Upstream of quasi-parallel bow shocks, reflected ions generate ion–ion instabilities. The resulting magnetic fluctuations can advect through the shock and interact with planetary magnetospheres.
Brandon L. Burkholder, Li-Jen Chen, Katariina Nykyri, Norberto Romanelli, Menelaos Sarantos, Dave Sibeck, Jaye Verniero, Gina A. DiBraccio, Daniel Gershman, Martin Lindberg, Erin Kincade   +10 more
doaj   +1 more source

Spatial distribution of upstream magnetospheric ≥50 keV ions [PDF]

Annales Geophysicae, 2000
We present for the first time a statistical study of \geq50 keV ion events of a magnetospheric origin upstream from Earth's bow shock. The statistical analysis of the 50-220 keV ion events observed by the IMP-8 spacecraft shows: (1) a dawn-dusk ...
G. C. Anagnostopoulos, G. C. Anagnostopoulos, G. Argyropoulos, G. Argyropoulos, G. Kaliabetsos, G. Kaliabetsos   +5 more
doaj   +1 more source

Multiple and Precessing Collimated Outflows in the Planetary Nebula IC 4634

, 2008
With its remarkable double-S shape, IC 4634 is an archetype of point-symmetric planetary nebulae (PN). In this paper, we present a detailed study of this PN using archival HST WFPC2 and ground-based narrow-band images to investigate its morphology, and ...
Alejandro Raga, Angels Riera, de Freitas Pacheco J. A., G. Benítez, Lorenzo Olguín, Luis F. Miranda, Martín A. Guerrero, McKeith C. D., Miranda L. F., Pablo F. Velázquez, Patriarchi P., Raga A. C., Roberto Vázquez, Stanghellini L., You‐Hua Chu   +14 more
core   +1 more source

The multiple dimensions of intraspecific variation in seed dispersal

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Seed dispersal plays a central role in plant ecology and evolution, and understanding its variation is key to predicting species demography and range dynamics. However, dispersal is difficult to measure, and most modelling and field studies assume uniform dispersal ...
Catharina Y. Utami, Cyrille Violle, Denis Vile, François Vasseur   +3 more
wiley   +1 more source

A Simulation Study of an HFA-like Event at Mars

The Astrophysical Journal
Hot flow anomalies (HFAs) are transient structures at planetary bow shocks characterized by hot, tenuous plasma. At Mars, where no global dipole field exists, such events interact with the induced magnetosphere in a unique and poorly understood way. This
Maodong Yan, Jiuhou Lei, Ziyi Yang, Binzheng Zhang, Tong Dang   +4 more
doaj   +1 more source