Results 71 to 80 of about 56,805 (216)
Impact of Thermal Weathering on Mercury's Reflectance
Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.Abstract MErcury Surface, Space ENviroment, GEochemistry, and Ranging (MESSENGER) observations suggest that sulfur‐bearing minerals are key components of Mercury's surface. These minerals have been proposed to explain the strong concave downward curvature between 300 and 600 nm in MESSENGER reflectance spectra of the hollows.
O. Barraud +3 more
wiley +1 more source
Untrackable distal ejecta on planetary surfaces
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 +1 more source
, 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
Small-Scale X-ray Variability in the Cassiopeia A Supernova Remnant [PDF]
, 2006 A comparison of X-ray observations of the Cassiopeia A supernova remnant taken in 2000, 2002, and 2004 with the Chandra ACIS-S3 reveals the presence of several small scale features (
Daniel J. Patnaude +3 more
core +3 more sources
Dynamical mass ejection from black hole-neutron star binaries [PDF]
Phys. Rev. D 92, 044028 (2015), 2015 We investigate properties of material ejected dynamically in the merger of black hole-neutron star binaries by numerical-relativity simulations. We systematically study the dependence of ejecta properties on the mass ratio of the binary, spin of the black hole, and equation of state of the neutron-star matter.
arxiv +1 more source
Mega-ejecta on asteroid Vesta [PDF]
Geophysical Research Letters, 2011 [1] Asteroid 4 Vesta, sometimes called the “smallest terrestrial planet”, will be orbited next July by NASA's Dawn mission. This will be the first time a small planet is visited by a spacecraft, and novel geological structures are expected. A key issue regarding Vesta (mean diameter 530 km) is to what extent its geology is dominated by the ∼460 km ...
Martin Jutzi, Erik Asphaug
openaire +2 more sources
Rapid Communications in Mass Spectrometry, Volume 39, Issue 9, 15 May 2025.ABSTRACT Rationale Corals are continuous, time‐resolved archives of ambient seawater geochemistry and can extend climate records beyond direct monitoring. The iodine‐to‐calcium (I/Ca) ratio may be a proxy for local oxygen depletion in corals, but the current solution‐based ICP‐MS protocol limits sampling resolution.
Ashley N. Prow‐Fleischer, Zunli Lu
wiley +1 more source
EPJ Web of Conferences, 2012 The effect of the impact angle of projectiles on the crater shape and ejecta in thick aluminum alloy targets was investigated in hypervelocity impacts.
Hayashi K., Nishida M., Ito Y.
doaj +1 more source
The Astrophysical Journal, 2023 We present proper motion measurements of the oxygen-rich ejecta of the LMC supernova remnant N132D using two epochs of Hubble Space Telescope Advanced Camera for Surveys data spanning 16 years.
John Banovetz +10 more
doaj +1 more source
X-Ray Emitting Ejecta of Supernova Remnant N132D
, 2007 The brightest supernova remnant in the Magellanic Clouds, N132D, belongs to the rare class of oxygen-rich remnants, about a dozen objects that show optical emission from pure heavy-element ejecta.
Beasley M. +4 more
core +1 more source