Ejecta from the DART-produced active asteroid Dimorphos. [PDF]
Nature, 2023 Some active asteroids have been proposed to be formed as a result of impact events^ 1 . Because active asteroids are generally discovered by chance only after their tails have fully formed, the process of how impact ejecta evolve into a tail has, to our ...
Li JY +63 more
europepmc +3 more sources
Circumstellar ejecta around LBV’s [PDF]
International Astronomical Union Colloquium, 1989 AbstractThe properties of circumstellar shells around LBV’s are reviewed. Some LBV’s are surrounded by very extended nebulosities, similar to classical planetary nebulae, with AG Car as the prototype. The masses of these nebulae are of the order of a solar mass and their kinematic ages are about 104years.
O. Stahl
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Untrackable distal ejecta on planetary surfaces [PDF]
Nature Communications, 2023 Heterogeneous shock impedances of planetary materials cause abrupt changes of ejection angles, forming non-radial ejecta. Interpretations for provenances of surface deposits and ages derived from crater counts are affected by such untrackable ejecta.
Rui Xu +4 more
doaj +2 more sources
On the Jet–Ejecta Interaction in 3D GRMHD Simulations of a Binary Neutron Star Merger Aftermath [PDF]
, 2022 Short γ-ray burst (sGRB) jets form in the aftermath of a neutron star merger, drill through disk winds and dynamical ejecta, and extend over four to five orders of magnitude in distance before breaking out of the ejecta.
O. Gottlieb +5 more
semanticscholar +1 more source
Dynamical ejecta of neutron star mergers with nucleonic weak processes I: Nucleosynthesis [PDF]
, 2021 We present a coherent study of the impact of neutrino interactions on the r-process element nucleosynthesis and the heating rate produced by the radioactive elements synthesised in the dynamical ejecta of neutron star-neutron star (NS-NS) mergers.
I. Kullmann +5 more
semanticscholar +1 more source
Morphology and spectral properties of the DART impact ejecta with VLT/MUSE
Astronomy & Astrophysics, 2023 Context. On September 26, 2022, the NASA DART mission impacted the asteroid Dimorphos, the smaller component of the Didymos binary asteroid system. This provided a unique opportunity to observe, in real time, the evolution of the ejecta cloud produced by
C. Opitom +8 more
semanticscholar +1 more source
Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae [PDF]
Astronomy & Astrophysics, 2020 Present and upcoming time-domain astronomy efforts, in part driven by gravitational-wave follow-up campaigns, will unveil a variety of rare explosive transients in the sky.
M. Renzo +7 more
semanticscholar +1 more source
Molecules in Supernova Ejecta [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractThe first molecules detected at infrared wavelengths in the ejecta of a Type II supernova, namely SN1987A, consisted of CO and SiO. Since then, confirmation of the formation of these two species in several other supernovae a few hundred days after explosion has been obtained.
Cherchneff Isabelle, Sarangi Arkaprabha
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A numerical study of the interaction between two ejecta in the interplanetary medium: one- and two-dimensional hydrodynamic simulations [PDF]
Annales Geophysicae, 2004 We studied the heliospheric evolution in one and two dimensions of the interaction between two ejecta-like disturbances beyond the critical point: a faster ejecta 2 overtaking a previously launched slower ejecta 1. The study is based on a
A. Gonzalez-Esparza +2 more
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Fast neutrino flavor conversion, ejecta properties, and nucleosynthesis in newly-formed hypermassive remnants of neutron-star mergers [PDF]
, 2020 Neutrinos emitted in the coalescence of two neutron stars affect the dynamics of the outflow ejecta and the nucleosynthesis of heavy elements. In this work, we analyze the neutrino emission properties and the conditions leading to the growth of flavor ...
M. George +4 more
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