Results 1 to 10 of about 89 (66)

Observations of a new foreshock region upstream of a foreshock bubble's shock [PDF]

Geophysical Research Letters, 2016
Earth's foreshock is a region within the solar wind upstream of Earth's bow shock filled with backstreaming solar wind particles reflected at the shock.
Terry Z Liu, H Hietala, V Angelopoulos
exaly   +3 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.
, Terry Z Liu, L B Wilson
exaly   +2 more sources

Statistical Study of Favorable Foreshock Ion Properties for the Formation of Hot Flow Anomalies and Foreshock Bubbles

Journal of Geophysical Research: Space Physics, 2022
Abstract 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.
Terry Z Liu, Hui Zhang
exaly   +2 more sources

THEMIS observations of tangential discontinuity‐driven foreshock bubbles [PDF]

Geophysical Research Letters, 2015
AbstractForeshock bubbles (FBs), transient ion foreshock phenomena formed from highly concentrated suprathermal foreshock ions upstream of solar wind discontinuities, produce intense disturbances in the magnetosphere‐ionosphere system and can accelerate particles to even higher energies. Rotational discontinuities are known to drive FBs.
Terry Z Liu, , V Angelopoulos
exaly   +2 more sources

Cluster observations of foreshock bubbles and their boundary shocks

Earth, Planets and Space
Foreshock Bubbles (FBs) are transient structures in the Earth’s foreshock region, which are diamagnetic cavities formed by hot ion concentration around interplanetary magnetic field discontinuities and have significant compressional boundary shocks ...
X. H. Wei, C. L. Cai, J. Y. Yang, Y. D. Ma, Tieyan Wang, Y. Y. Liu, Lei. Dai   +6 more
doaj   +2 more sources

Multipoint observations of the structure and evolution of foreshock bubbles and their relation to hot flow anomalies [PDF]

Journal of Geophysical Research: Space Physics, 2016
AbstractWhen backstreaming foreshock ions pass through approaching solar wind discontinuities, they may get concentrated upstream of the discontinuities and form foreshock bubbles (FBs). Because FBs result in very intense global pressure variations upstream of and inside Earth's magnetosphere, they are important for solar wind‐magnetosphere coupling ...
Terry Z Liu, , V Angelopoulos
exaly   +2 more sources

Ion Energization and Acceleration Associated with Foreshock Bubbles: Results from a Hybrid-Vlasov Simulation and MMS Observations

Journal of Geophysical Research: Space Physics
Foreshock Bubbles (FBs) are large-scale transient structures found in Earth's foreshock region and are associated with foreshock-discontinuity interaction. FBs play a significant role in accelerating and energizing plasma through various mechanisms. In this study, we investigate the contribution of FBs to ion acceleration and energization by analyzing ...
Souhail Dahani, Lucile Turc, Veera Lipsanen, Shi Tao, Jonas Suni, Yann Pfau-Kempf, Milla Kalliokoski, Minna Palmroth, Daniel Gershman, Roy Torbert, James Burch   +10 more
wiley   +4 more sources

Simultaneous observations of MHD hot flow anomaly and kinetic foreshock bubble and their impacts

Frontiers in Physics
Hot flow anomalies (HFAs) and foreshock bubbles (FBs) are two types of transient phenomena characterized by flow deflected and hot cores bounded by one or two compressional boundaries in the foreshock.
Xi Lu, Xi Lu, Terry Liu, Xingran Chen, Antonius Otto, Hui Zhang   +5 more
doaj   +2 more sources

First observations of foreshock bubbles upstream of Earth's bow shock: Characteristics and comparisons to HFAs [PDF]

Journal of Geophysical Research: Space Physics, 2013
Using multipoint in situ observations upstream of Earth's bow shock from the THEMIS mission, we present the first observations of foreshock bubbles (FBs) and compare them to observations of hot flow anomalies (HFAs). FBs are recently conceptualized kinetic phenomena that can form under the commonplace condition of a rotational discontinuity in the ...
, N Omidi, D G Sibeck
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 ...
Chih-Ping Wang, Xueyi Wang, Terry Z Liu   +2 more
exaly   +2 more sources