Results 21 to 30 of about 17,020 (222)

Initial 40Ar‐39Ar Ages of the Paleocene‐Eocene Boundary Impact Spherules

Geophysical Research Letters, 2019
We report 40Ar‐39Ar step‐heating ages of Paleocene‐Eocene (P‐E) boundary impact spherules from Atlantic Margin coastal plain and open ocean sites. We test the hypothesis that the P‐E spherules are reworked from an earlier event (e.g., K‐Pg impact at ~66 ...
Morgan F. Schaller, Brent D. Turrin, Megan K. Fung, Miriam E. Katz, Carl C. Swisher   +4 more
doaj   +1 more source

The role of neutrinos in explosive nucleosynthesis in core collapse supernova models with neutrino transport [PDF]

, 2007
The problem of core collapse supernova explosions is long standing and attempts to understand the mechanism have been ongoing. On one hand, a full understanding of the underlying mechanism is still pending.
Fröhlich, Carla
core   +1 more source

Hypervelocity impacts on thin brittle targets: experimental data and SPH simulations [PDF]

, 2005
The meteoroids and debris environment play an important role in the reduction of spacecraft life time. Ejecta or secondary debris, are produced when a debris or a meteoroid impact a spacecraft surface.
Chevalier, Jean-Marc, Durin, Christian, Malaise, Frédéric, Espinosa, Christine, Michel, Yann   +4 more
core   +1 more source

Experimental craters formed by single and multiple buried explosions and implications for volcanic craters with emphasis on maars

Geophysical Research Letters, 2012
Craters at many volcanoes, including most maars, are formed by multiple subsurface explosions. Experiments compared the crater formed by a single large, buried explosion, with craters formed by multiple explosions with the same cumulative energy ...
Greg A. Valentine, James D. L. White, Pierre‐Simon Ross, Jamal Amin, Jacopo Taddeucci, Ingo Sonder, Peter J. Johnson   +6 more
doaj   +1 more source

Infrared Ejecta and Cold Dust in the Young Supernova Remnant N132D

The Astrophysical Journal, 2023
We present Spitzer, Wide-field Infrared Survey Explorer (WISE), and Herschel observations of the young supernova remnant (SNR) N132D in the Large Magellanic Cloud, including 3–40 μ m Spitzer Infrared Spectrograph (IRS) mapping, 12 μ m WISE and 70, 100 ...
Jeonghee Rho, Aravind P. Ravi, Jonathan D. Slavin, Heechan Cha   +3 more
doaj   +1 more source

Liquefaction Ejecta-Induced Damage [PDF]

, 2022
The 2010-2011 Canterbury earthquake sequence (CES) devasted Christchurch, New Zealand. Liquefied soil were ejected onto the ground surface, damaging more than 15,000 houses beyond economic repair.
Mijic, Zorana
core   +1 more source

Geochemical and petrographic evidence for the Vredefort proximal impact ejecta in the Northern Cape, South Africa

, 2022
>Magister Scientiae - MScThe advancement of the understanding of hypervelocity impacts lies in discovering impact structures and both proximal and distal impact ejecta.
Mautle, Floyd Danger
core  

Atmospheric Interactions of Ejecta on Earth and Mars Including the Effect of Vaporization

The Planetary Science Journal, 2023
Atmospheres play an important role in ejecta deposition after an impact event. Many impact experiments and simulations neglect the effect of atmospheres.
M. A. Carlson, H. J. Melosh, B. C. Johnson   +2 more
doaj   +1 more source

Lobate Ejecta Deposits at Mercury's South Pole (H15)

, 2022
International audienceDuring geological mapping of H15, we have discovered unrecorded lobate ejecta deposits. One example, at Nairne crater (c4; 70.36°S, 1.65°E), exhibits two distinct lobes that propagate into the floor of a pre-existing, more degraded (
Rothery, David, A, Lennox, Annie, Conway, Susan J., Balme, Matthew, R, Wright, Jack   +4 more
core   +5 more sources

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

Aerospace
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, Qingming Zhang, Renrong Long, Jiankang Ren, Juncheng Li, Zizheng Gong, Qiang Wu, Siyuan Ren   +7 more
doaj   +1 more source