Results 51 to 60 of about 72,692 (306)

Impact Experiment on Asteroid (162173) Ryugu: Structure beneath the Impact Point Revealed by In Situ Observations of the Ejecta Curtain

open access: yesAstrophysical Journal, 2020
An impact experiment was performed on the surface of the C-type asteroid (162173) Ryugu using an instrument called the Small Carry-on Impactor (SCI) carried by the Japan Aerospace Exploration Agency spacecraft Hayabusa2.
T. Kadono   +10 more
semanticscholar   +1 more source

Cosmic noise absorption signature of particle precipitation during interplanetary coronal mass ejection sheaths and ejecta [PDF]

open access: yesAnnales Geophysicae, 2020
We study here energetic-electron (E>30 keV) precipitation using cosmic noise absorption (CNA) during the sheath and ejecta structures of 61 interplanetary coronal mass ejections (ICMEs) observed in the near-Earth solar wind between 1997 and ...
E. Kilpua   +13 more
doaj   +1 more source

Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission

open access: yes, 2010
We show that the expansion of ejecta in Tycho's supernova remnant (SNR) is consistent with a spherically symmetric shell, based on Suzaku measurements of the Doppler broadened X-ray emission lines. All the strong K_alpha line emission show broader widths
Akihiro Furuzawa   +37 more
core   +1 more source

Nucleosynthesis in the Innermost Ejecta of Neutrino-driven Supernova Explosions in Two Dimensions [PDF]

open access: yes, 2017
We examine nucleosynthesis in the innermost neutrino-processed ejecta (a few ) of self-consistent two-dimensional explosion models of core-collapse supernovae (CCSNe) for six progenitor stars with different initial masses.
S. Wanajo   +3 more
semanticscholar   +1 more source

Propagation of a Short GRB Jet in the Ejecta: Jet Launching Delay Time, Jet Structure, and GW170817/GRB 170817A [PDF]

open access: yesAstrophysical Journal, 2019
We perform a series of relativistic magnetohydrodynamic simulations to investigate how a hot magnetic jet propagates within the dynamical ejecta of a binary neutron star merger, focusing on how the jet structure depends on the delay time of jet launching
J. Geng   +4 more
semanticscholar   +1 more source

Experimental and Numerical Simulation of Ejecta Size and Velocity of Hypervelocity Impact Rubble-Pile Asteroid

open access: yesAerospace
Rubble-pile asteroids may be the type of near-Earth object most likely to threaten Earth in a future collision event. Small-scale impact experiments and numerical simulations for large-scale impacts were conducted to clarify the size ratio of the boulder/
Wenjin Liu   +7 more
doaj   +1 more source

Effects of target temperature on size distribution of ejecta in hypervelocity impact : Toward revision of ISO11227

open access: yesMechanical Engineering Journal, 2016
As a preliminary study, the effects of target temperature on ejecta size were examined at an impact velocity of 3.5 km/s with the goal of improving the ISO11227.
Masahiro NISHIDA   +7 more
doaj   +1 more source

Mass Ejection from the Remnant of a Binary Neutron Star Merger: Viscous-Radiation Hydrodynamics Study

open access: yes, 2018
We perform long-term general relativistic neutrino radiation hydrodynamics simulations (in axisymmetry) for a massive neutron star (MNS) surrounded by a torus, which is a canonical remnant formed after the binary neutron star merger. We take into account
Fujibayashi, Sho   +4 more
core   +1 more source

Transport of impact ejecta from Mars to its moons as a means to reveal Martian history [PDF]

open access: yesScientific Reports, 2019
Throughout the history of the solar system, Mars has experienced continuous asteroidal impacts. These impacts have produced impact-generated Mars ejecta, and a fraction of this debris is delivered to Earth as Martian meteorites.
R. Hyodo   +4 more
semanticscholar   +1 more source

Nucleosynthesis in dynamical and torus ejecta of compact binary mergers

open access: yes, 2015
We present a comprehensive study of r-process element nucleosynthesis in the ejecta of compact binary mergers (CBMs) and their relic black-hole (BH)-torus systems.
Bauswein, Andreas   +4 more
core   +1 more source

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