Results 41 to 50 of about 384,338 (204)
Interaction of young stellar object jets with their accretion disk [PDF]
, 2004 I reexamine recent observations of velocity profiles across jets blown by young stellar objects, and argue that the observations do not support the interpretation of jets rotating around their symmetry axes. Instead, I propose that the interaction of the jets with a twisted-tilted (wrapped) accretion disk can form the observed asymmetry in the jets ...
arxiv +1 more source
The structure of weakly-magnetized $ γ$-ray burst jets [PDF]
, 2020 The interaction of gamma-ray burst (GRB) jets with the dense media into which they are launched promote the growth of local hydrodynamic instabilities along the jet boundary. In a companion paper we study the evolution of hydrodynamic (unmagnetized) jets, finding that mixing of jet-cocoon material gives rise to an interface layer, termed jet-cocoon ...
arxiv +1 more source
High‐resolution X‐ray scanning with a diffuse Huffman‐patterned probe to reduce radiation damage
Journal of Synchrotron Radiation, EarlyView.This paper introduces high‐resolution imaging using diffuse probes, which allow for lower energy deposition per unit area per unit time, by encoding Huffman‐like patterns onto them, enabling a tighter impulse response. The approach, demonstrated in X‐ray imaging, involves using specially fabricated masks to shape the probe and recover sharp object ...
Alaleh Aminzadeh +5 more
wiley +1 more source
Multiscale Modeling of Astrophysical Jets
Acta Polytechnica CTU Proceedings, 2014 We are developing the capability for a multi-scale code to model the energy deposition rate and momentum transfer rate of an astrophysical jet which generates strong plasma turbulence in its interaction with the ambient medium through which it propagates.
James H. Beall +3 more
doaj +1 more source
Distinguishing Propagation vs. Launch Physics of Astrophysical Jets and the Role of Experiments [PDF]
Astrophys.SpaceSci.307:7-10,2007, 2006 The absence of other viable momentum sources for collimated flows leads to the likelihood that magnetic fields play a fundamental role in jet launch and/or collimation in astrophysical jets. To best understand the physics of jets, it is useful to distinguish between the launch region where the jet is accelerated and the larger scales where the jet ...
arxiv +1 more source
Reflections on a Made‐Up Career
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract Launched in 1999, Geosciences Professional Services Inc. (Geo Prose) is a small business that supports the advancement of geoscience through assistance with document editing and design. The story of how Geo Prose came to be is one of opportunities taken rather than one of entrepreneurial spirit. It’s a story of how knowing a little bit about a
Ellen S. Kappel
wiley +1 more source
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley +1 more source
Laboratory experiments on plasma jets in a magnetic field using high-power lasers
EPJ Web of Conferences, 2013 The experiments to simulate astrophysical jet generation are performed using Gekko XII (GXII) HIPER laser system at the Institute of Laser Engineering. In the experiments a fast plasma flow generated by shooting a CH plane (10 μm thickness) is observed ...
Nishio K. +20 more
doaj +1 more source
Science Education, Volume 109, Issue 3, Page 769-795, May 2025.ABSTRACT Research Experiences for Teachers (RET) programs are a burgeoning approach to engage teachers in STEM (science, technology, engineering, mathematics) research that they can translate into their K‐12 classrooms. Despite an increase in studies of RETs, there is a need for comparison of RET and non‐RET teachers' student outcomes.
John Keller +13 more
wiley +1 more source
The Eddy Flux Transport of the Magnetohydrodynamic Quasi‐Geostrophic Disturbances
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract The classic Eliassen‐Palm (E‐P) flux in the geophysical fluid dynamics is a vector to qualify the eddy momentum and heat flux transport by Rossby waves in the latitude‐height plane. In this investigation, we derive two magnetic E‐P fluxes to quantify the eddy energy transport by magnetic Rossby waves by using magnetohydrodynamic quasi ...
Chengkang Li, Yaokun Li
wiley +1 more source