Results 61 to 70 of about 50,958 (220)

MAGNETOHYDRODYNAMIC EFFECTS IN RELATIVISTIC EJECTA [PDF]

International Journal of Modern Physics D, 2010
We study the problem of deceleration of an arbitrarily magnetized relativistic ejecta in a static unmagnetized medium and its connection to the physics of gamma-ray bursts (GRBs). By computing exact solutions of the Riemann problem describing this scenario, we find that with the same initial Lorentz factor, the reverse shock becomes progressively ...
YOSUKE MIZUNO, BING ZHANG, Giacomazzo, Bruno, KEN ICHI NISHIKAWA, PHILIP E. HARDEE, SHIGEHIRO NAGATAKI, DIETER H. HARTMANN   +6 more
openaire   +3 more sources

Disentangling palaeoecological and outcrop controls on MISS occurrence in c. 1 Ga fluvio‐lacustrine facies of the Diabaig Formation, Scotland

Sedimentology, EarlyView.
ABSTRACT The c. 1 Ga Diabaig Formation of north‐west Scotland preserves diverse lacustrine and fluvial facies and abundant microbial and non‐microbial surficial sedimentary features. 172.6 m of section was logged across seven localities to assess the distribution of microbially induced sedimentary structures (MISS) relative to lithofacies, substrate ...
Seán T. Herron, Neil S. Davies, William J. McMahon   +2 more
wiley   +1 more source

Chronology, Local Stratigraphy, and Foreign Ejecta Materials at the Chang'e‐6 Landing Site: Constraints on the Provenance of Samples Returned From the Moon's Farside

Geophysical Research Letters
China's Chang'e‐6 (CE‐6) mission has returned the first‐ever lunar farside samples from a mare plain on the southern Apollo basin floor. The crater statistics of the CE‐6 mare unit and the provenance of the samples are crucial in interpreting the CE‐6 ...
Luyuan Xu, Le Qiao, Minggang Xie, Yiran Wang, Meng‐Hua Zhu, Jianguo Yan   +5 more
doaj   +1 more source

Late Spectral Evolution of the Ejecta and Reverse Shock in SN1987A

, 2012
We present observations with VLT and HST of the broad emission lines from the inner ejecta and reverse shock of SN 1987A from 1999 until 2012 (days 4381 -- 9100 after explosion). We detect broad lines from H-alpha, H-beta, Mg I], Na I, [O I], [Ca II] and
Challis, Peter, Chevalier, Roger, Fransson, Claes, Groningsson, Per, Jerkstrand, Anders, Kirshner, Robert P., Kjaer, Karina, Larsson, Josefin, Leibundgut, Bruno, Lundqvist, Peter, McCray, Richard, Sollerman, Jesper, Spyromilio, Jason   +12 more
core   +1 more source

Ejecta Blankets at Small Craters on the Moon

The Planetary Science Journal
Impact-derived ejecta covers most of the lunar surface, originating from recent impacts through to the beginning of the geologic record. Despite how common ejecta is, accurate measurements of ejecta thickness are difficult to obtain, and existing ...
Trevor Austin, Mark Robinson, Prasun Mahanti   +2 more
doaj   +1 more source

Dancing ejecta

Journal of Fluid Mechanics
Splashing of impacting drops produces a myriad of secondary spray droplets, which generate aerosols during rain on the ocean and can cause health hazards during the spraying of pesticides or enhance the droplet transmission of disease. Determining the size and number of the finest splashed droplets is therefore of practical interest.
Yuan Si Tian, Abdulrahman B. Aljedaani, Tariq Alghamdi, Sigurður T. Thoroddsen   +3 more
openaire   +2 more sources

Vertical and Spatial Geochemical Variations of Nishinoshima Volcaniclastic Deposits, Japan, During Episode 4

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Nishinoshima is a volcanic island in the Ogasawara Arc that has exhibited intermittent activity since 2013, including four major eruptive episodes: 2013–2015 (Episode 1), 2017 (Episode 2), 2018 (Episode 3), and 2019–2020 (Episode 4). Previous studies reported a change in eruption style—from a Strombolian eruption with lava flows (Episode 1 to the early
Erika Tanaka, Kenta Yoshida, Tomoki Sato, Yoshiro Nishio, Yoshihiko Tamura   +4 more
wiley   +1 more source

Self-similar solutions for the interaction of relativistic ejecta with an ambient medium

, 2006
We find self-similar solutions to describe the interaction of spherically symmetric ejecta expanding at relativistic speeds with an ambient medium having a power law density distribution.
Gandel’man G. M., Guderly G., Ko Nakamura, Taylor G. I., Toshikazu Shigeyama   +4 more
core   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon, Samuel Birch, Audrey Chatain, Charles Cockell, Kendra K. Farnsworth, Peter M. Higgins, Stéphane Le Mouélic, Rosaly M. C. Lopes, Michael J. Malaska, Mohit Melwani Daswani, Kelly E. Miller, Catherine D. Neish, Olaf G. Podlaha, Jani Radebaugh, Lauren R. Schurmeier, Ashley Schoenfeld, Krista M. Soderlund, Anezina Solomonidou, Christophe Sotin, Nicholas A. Teanby, Tetsuya Tokano, Steven D. Vance   +21 more
wiley   +1 more source

Effect of impact angles on ejecta and crater shape of aluminum alloy 6061-T6 targets in hypervelocity impacts

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