Results 81 to 90 of about 50,958 (220)

Ancient eruptions of Eta Carinae: A tale written in proper motions

, 2016
We analyze eight epochs of Hubble Space Telescope H$\alpha$+[N II] imaging of Eta Carinae's outer ejecta. Proper motions of nearly 800 knots reveal that the detected ejecta are divided into three apparent age groups, dating to around 1250 A.D., to around
Kiminki, Megan M., Reiter, Megan, Smith, Nathan   +2 more
core   +1 more source

Life on Mars? The physiological perspective

Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

Coupled Space Weathering: Nanophase Iron Formation by Micrometeoroid Impact and Solar Wind Sputtering

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Understanding the interplay between micrometeoroid impacts and solar wind irradiation is crucial for interpreting lunar surface evolution. Using reactive molecular dynamics simulations and surface binding energy (SBE) analyses, this study investigates the coupled effects of these two dominant space weathering processes on lunar regolith ...
Ziyu Huang, Masatoshi Hirabayashi
wiley   +1 more source

3D Reconstruction of DART Ejecta at Dimorphos Reveals an Anisotropic, Filamentary Structure

The Planetary Science Journal
We present a 3D reconstruction of the ejecta plume generated by the DART impact on Dimorphos based on LUKE images acquired by LICIACube. Using adaptive histogram equalization and geometric coregistration from multiple vantage points, we identified and ...
J. D. P. Deshapriya, P. H. Hasselmann, I. Gai, E. Dotto, S. Ivanovski, A. Rossi, A. Zinzi, V. Della Corte, I. Bertini, S. Ieva, E. Mazzotta Epifani, M. Dall’Ora, D. Perna, M. Amoroso, J. Beccarelli, J. R. Brucato, L. Calderone, A. Campo Bagatin, A. Capannolo, S. Caporali, M. Ceresoli, A. Cheng, G. Cremonese, R. T. Daly, L. Gomez Casajus, Xiaoyu Fu, David A. Glenar, E. Gramigna, G. Impresario, Seth A. Jacobson, Özgür Karatekin, R. Lasagni Manghi, M. Lavagna, Ramin Lolachi, M. Lombardo, A. Lucchetti, R. Luther, D. Modenini, M. Pajola, E. Palmer, S. Pirrotta, G. Poggiali, S. Raducan, P. Sánchez, Cem Berk Senel, Timothy J. Stubbs, G. Tancredi, P. Tortora, F. Tusberti, M. Zannoni, G. Zanotti   +50 more
doaj   +1 more source

Mercurian impact ejecta: Meterorites and mantle

, 2008
We have examined the fate of impact ejecta liberated from the surface of Mercury due to impacts by comets or asteroids, in order to study (1) meteorite transfer to Earth, and (2) re-accumulation of an expelled mantle in giant-impact scenarios seeking to ...
Artemieva, Benz, Benz, Bottke, Boynton, Burns, Cameron, Dones, Gladman, Gladman, Gladman, Head, Love, Marchi, Markowski, Melosh, Morbidelli, Palme, Robertson, Sprague, Vokrouhlický, Wetherill, Wyatt   +22 more
core   +1 more source

Ejecta Wakes from Companion Interaction in Type Ia Supernova Remnants

The 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, Gabriel Kumar, Lars Bildsten   +2 more
doaj   +1 more source

Circumstellar ejecta around LBV’s [PDF]

International Astronomical Union Colloquium, 1989
Abstract The 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 104 years.
openaire   +1 more source

The Effect of the Velocity Distribution on Kilonova Emission

The 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, Aimee L. Hungerford, Ryan T. Wollaeger, Jonah M. Miller, Soumi De, Christopher J. Fontes, Oleg Korobkin, Atul Kedia, Marko Ristic, Richard O’Shaughnessy   +9 more
doaj   +1 more source

The dynamic ejecta of compact object mergers and eccentric collisions

, 2012
Compact object mergers eject neutron-rich matter in a number of ways: by the dynamical ejection mediated by gravitational torques, as neutrino-driven winds and probably also a good fraction of the resulting accretion disc finally becomes unbound by a ...
Rosswog, S.
core   +1 more source

Spectroscopic r-process Abundance Retrieval for Kilonovae. II. Lanthanides in the Inferred Abundance Patterns of Multicomponent Ejecta from the GW170817 Kilonova

The Astrophysical Journal
In kilonovae, freshly synthesized r -process elements imprint features on optical spectra, as observed in AT2017gfo, the counterpart to the GW170817 binary neutron star merger.
Nicholas Vieira, John J. Ruan, Daryl Haggard, Nicole M. Ford, Maria R. Drout, Rodrigo Fernández   +5 more
doaj   +1 more source