Results 141 to 150 of about 70,331 (294)

Effect of Target Properties on Regolith Production

open access: yesRemote Sensing
Based on the measurements of regolith thicknesses on the lunar maria (basalts), the lunar regolith was determined to have accumulated at a rate of about 1 m/Gyr since the era of the late heavy bombardment.
Minggang Xie, Yan Li
doaj   +1 more source

Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817

open access: yesThe Astrophysical Journal Letters, 2017
The source of the gravitational-wave (GW) signal GW170817, very likely a binary neutron star merger, was also observed electromagnetically, providing the first multi-messenger observations of this type.
B. P. Abbott   +1101 more
doaj   +1 more source

Ejecta Wakes from Companion Interaction in Type Ia Supernova Remnants

open access: yesThe Astrophysical Journal
Type Ia supernovae are triggered by accretion onto a white dwarf from a companion that is most likely Roche lobe–filling at the time of the explosion.
Logan J. Prust   +2 more
doaj   +1 more source

Analysis of Late--time Light Curves of Type IIb, Ib and Ic Supernovae

open access: yes, 2015
The shape of the light curve peak of radioactive--powered core--collapse "stripped--envelope" supernovae constrains the ejecta mass, nickel mass, and kinetic energy by the brightness and diffusion time for a given opacity and observed expansion velocity.
Clocchiatti, A.   +2 more
core   +1 more source

Effect of target properties and impact velocity on ejection dynamics and ejecta deposition

open access: yesMeteoritics and Planetary Science, 2018
Impact craters are formed by the displacement and ejection of target material. Ejection angles and speeds during the excavation process depend on specific target properties.
R. Luther   +3 more
semanticscholar   +1 more source

Ejecta types on Ganymede and Callisto [PDF]

open access: yes
Ejecta types on Ganymede and Callisto have been identified from Voyager 1 and 2 images. Image resolution used range from approx. 0.6 to approx. 4 km/pxl, which allowed the surveying of almost all of the mappable surface of the two satellites.
Greeley, Ronald, Horner, V. M.
core   +1 more source

The Effect of the Velocity Distribution on Kilonova Emission

open access: yesThe Astrophysical Journal
The electromagnetic emission from the nonrelativistic ejecta launched in neutron star mergers (either dynamically or through a disk wind) has the potential to probe both the total mass and composition of this ejecta.
Chris L. Fryer   +9 more
doaj   +1 more source

Delivery of DART Impact Ejecta to Mars and Earth: Opportunity for Meteor Observations

open access: yesThe Planetary Science Journal
NASA’s Double Asteroid Redirection Test (DART) and ESA’s Hera missions offer a unique opportunity to investigate the delivery of impact ejecta to other celestial bodies. We performed ejecta dynamical simulations using 3 million particles categorized into
Eloy Peña-Asensio   +3 more
doaj   +1 more source

A secondary ejecta explanation of a lunar seismogram [PDF]

open access: green, 1970
Gee Kung Chang   +2 more
openalex   +1 more source

Spatial distribution and morphometric measurements of circum-Caloris knobs on Mercury: Application of novel shadow measurements [PDF]

open access: yes, 2018
The Caloris basin (1550 km diameter) is the largest, well-preserved impact feature on Mercury. Its impact ejecta, excavated from the lower crust and uppermost mantle, provides an opportunity to investigate the interior materials of the planet.
Balme, M. R.   +3 more
core  

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