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Full-Text Articles in Physical Sciences and Mathematics
3d Mhd Models Of The Centrifugal Magnetosphere From A Massive Star With An Oblique Dipole Field, Asif Ud-Doula, Stanley P. Owocki, Marc Gagné, Simon Daley-Yates
3d Mhd Models Of The Centrifugal Magnetosphere From A Massive Star With An Oblique Dipole Field, Asif Ud-Doula, Stanley P. Owocki, Marc Gagné, Simon Daley-Yates
Earth & Space Sciences Faculty Publications
We present results from new self-consistent 3D magnetohydrodynamics(MHD)simulations of the magnetospheres from massive stars with a dipole magnetic axis that has a non-zero obliquity angle (β) to the star’s rotation axis. As an initial direct application, we compare the global structure of co-rotating discs for nearly aligned (β = 5◦) versus half-oblique (β = 45◦) models, both with moderately rapid rotation (∼0.5 critical). We find that accumulation surfaces broadly resemble the forms predicted by the analytical rigidly rotating magnetosphere model, but the mass buildup to near the critical level for centrifugal breakout against magnetic confinement distorts the field from the …
Delineating A Stream Network At Gale Crater, Mars, On Arcgis Pro: A Geographic Information Systems Approach, Elpidio Guzman De La Cruz
Delineating A Stream Network At Gale Crater, Mars, On Arcgis Pro: A Geographic Information Systems Approach, Elpidio Guzman De La Cruz
West Chester University Master’s Theses
The northwestern region of the Gale crater experienced flooding in the past. Delineation of stream networks for the northwestern region of Gale Crater, Mars employing geographic information systems (GIS) techniques is applied. The stream network produced by the algorithm in the study traverses the clay unit in Gediz Vallis, and visual HiRISE imagery analysis correlates with a topologic cross section of an inverted river channel of 750 meters wide and 90 meters deep. HiRISE imagery analysis further confirms a sulfate and clay stratigraphic unit in a stream 125 meters wide and 25 meters deep. Lastly, data smoothing procedures in the …