Results 81 to 90 of about 94,773 (106)
Looking for Rational Bubbles in Agricultural Commodity Markets [PDF]
In this paper, we use a bootstrap methodology to helps us to compute the finite sample probability distribution of the asymptotic tests recently proposed in Phillips et al. (2009b) and Phillips and Yu (2009c).
Gutierrez, Luciano
core
Geophysical Research LettersAbstract Solar wind directional discontinuities can generate transient mesoscale structures such as foreshock bubbles and hot flow anomalies (HFAs) upstream of Earth's bow shock. These structures can have a global impact on near‐Earth space, so understanding their formation conditions is essential.
Yann Pfau-Kempf +2 more
exaly +4 more sources
Geophysical Research Letters, 2020 AbstractForeshock transients have been observed in the midtail foreshock. How a foreshock transient evolves in nightside foreshock and how it may impact the midtail bow shock, magnetosheath, and magnetopause has not been simulated. In this study, we present three‐dimensional global hybrid simulation results of a foreshock bubble (FB) driven by an ...
Xueyi Wang, Yu Lin, Terry Z Liu
exaly +3 more sources
Some of the next articles are maybe not open access.
Ion Acceleration by Foreshock Bubbles
Journal of Geophysical Research: Space Physics, 2021AbstractForeshock bubbles (FBs) form as a result of the interaction between solar wind discontinuities and backstreaming ion beams in the foreshock. They are carried by the solar wind in the anti‐sunward direction and are associated with high energy ions.
Sun Lee, Nojan Omidi, David G. Sibeck
exaly +2 more sources
Journal of Geophysical Research: Space Physics, 2022 Hot flow anomalies (HFAs) and foreshock bubbles (FBs) are frequently observed in Earth’s foreshock, which can significantly disturb the bow shock and therefore the magnetosphere-ionosphere system and can accelerate particles. Previous statistical studies have identified the solar wind conditions (high solar wind speed and high Mach number, etc.) that ...
Hui Zhang, Vassilis Angelopoulos
exaly +2 more sources
Formation and Topology of Foreshock Bubbles
Journal of Geophysical Research: Space Physics, 2020AbstractWe use global and local hybrid (kinetic ions and fluid electrons) simulations to investigate the conditions under which foreshock bubbles (FBs) form and how their topology changes with solar wind conditions. FBs form as a result of the interaction between solar wind discontinuities and backstreaming ion beams in the foreshock.
Vassilis Angelopoulos, Sun Lee
exaly +2 more sources
A Foreshock Bubble Driven by an IMF Tangential Discontinuity: 3D Global Hybrid Simulation
Geophysical Research Letters, 2021 AbstractForeshock bubbles (FBs) have been observed upstream of solar wind tangential discontinuities (TDs). A hypothesized mechanism is that foreshock ions with gyroradii larger than the TD thickness may move to upstream side of TDs and generate FBs. In this study, we present the very first three‐dimensional global hybrid simulation of an FB driven by ...
Xueyi Wang, Yu Lin, Terry Z Liu
exaly +2 more sources
Microscopic, Multipoint Characterization of Foreshock Bubbles With Magnetospheric Multiscale (MMS) [PDF]
Journal of Geophysical Research: Space Physics, 2020 AbstractThis work presents the first detailed analysis of foreshock bubbles (FBs) using high‐resolution Magnetospheric Multiscale (MMS) data. Between October 2017 and January 2019, MMS captured 10 foreshock transient events with burst resolution data that we show are consistent with FBs.
Joseph F Fennell, Barry H. Mauk
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Foreshock Bubbles at Venus: Hybrid Simulations and VEX Observations
Journal of Geophysical Research: Space Physics, 2020AbstractIn the absence of a global magnetic field at Venus, its ionosphere is the obstacle to the flow of the solar wind resulting in the formation of a smaller bow shock and foreshock. Spacecraft observations and global hybrid (kinetic ions, fluid electrons) simulations have demonstrated that despite its smaller size, the foreshock at Venus has ...
Nojan Omidi +2 more
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Modeling the Expansion Speed of Foreshock Bubbles
Journal of Geophysical Research: Space Physics, 2023AbstractForeshock transients, including hot flow anomalies (HFAs) and foreshock bubbles (FBs), are frequently observed in the ion foreshock. Their significant dynamic pressure perturbations can disturb the bow shock, resulting in disturbances in the magnetosphere and ionosphere.
Hui Zhang +2 more
exaly +2 more sources