Comprehensive Study of Mass Ejection and Nucleosynthesis in Binary Neutron Star Mergers Leaving Short-lived Massive Neutron Stars by Sho Fujibayashi, Kenta Kiuchi, Shinya Wanajo, Koutarou Kyutoku, Yuichiro Sekiguchi, Masaru Shibata

“…Because of the larger disk mass, the post-merger ejecta mass is larger for more asymmetric binary mergers. …”
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Hubble Space Telescope Proper Motion Measurements of Supernova Remnant N132D: Center of Expansion and Age by John Banovetz, Dan Milisavljevic, Niharika Sravan, Kathryn E. Weil, Bhagya Subrayan, Robert A. Fesen, Daniel J. Patnaude, Paul P. Plucinsky, Charles J. Law, William P. Blair, Jon A. Morse

“…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. …”
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Near-IR Spectral Observations of the Didymos System: Daily Evolution Before and After the DART Impact Indicates that Dimorphos Originated from Didymos by David Polishook, Francesca E. DeMeo, Brian J. Burt, Cristina A. Thomas, Andrew S. Rivkin, Juan A. Sanchez, Vishnu Reddy

“…Ejecta from Dimorphos following the DART mission impact significantly increased the brightness of the Didymos–Dimorphos system, allowing us to examine subsurface material. …”
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New discovery of two seismite horizons challenges the Ries–Steinheim double-impact theory by Elmar Buchner, Volker J. Sach, Martin Schmieder

“…The older seismite horizon, demonstrated to be associated with the Ries impact, is overlain by distal impact ejecta in situ, forming a unique continental seismite-ejecta couplet within a distance of up to 180 km from the crater. …”
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Binary hypotheses for bipolar mass loss in transients by Fitzpatrick, BJR

“…The density profiles of the envelopes produce differing structure within the ejecta.</p> <p>We also investigate 3 specific bipolar mass loss events. …”

Kilonovae by Brian D. Metzger

“…Abstract The mergers of double neutron star (NS–NS) and black hole (BH)–NS binaries are promising gravitational wave (GW) sources for Advanced LIGO and future GW detectors. The neutron-rich ejecta from such merger events undergoes rapid neutron capture (r-process) nucleosynthesis, enriching our Galaxy with rare heavy elements like gold and platinum. …”
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Massive first star binaries as new tools for Galactic archaeology by Suda Takuma, Saitoh Takayuki R., Moritani Yuki, Matsuno Tadafumi, Shigeyama Toshikazu

“…We have studied the evolution of a metal-free massive binary after the collision of the supernova ejecta with a low-mass companion. Theoretical models are developed using simulations of binaries after core-collapse supernovae using stellar evolution models, supernova ejecta models, and hydrodynamic simulations of the system consisting of supernova ejecta and companion stars. …”
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Double Neutron Star Mergers: Are Late-time Radio Signals Overestimated? by Shao-Ze Li, Yun-Wei Yu, He Gao, Lin Lan

“…In contrast to supernova ejecta, the kilonova ejecta exhibits a relatively lesser mass and higher velocity, and its expansion may ultimately result in the ejecta density becoming so low that the medium particles can freely pass through the ejecta. …”
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Positron Annihilation Spectroscopy of Young Supernova Remnants by D. N. Doikov

“…We estimated the energy input into thermodynamic temperatures of the ejecta components. Additional heating and γ-ray luminosity of all the components of the examined ejecta were factored in. …”
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On the determination of shocked surface velocities by William Tillman Buttler, Christopher Ticknor

“…However, in the presence of ejecta, the resulting frequency noise often obscures the surface and subsequent impulses at later times. …”
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Regolith behavior under asteroid-level gravity conditions: low-velocity impact experiments by Julie Brisset, Joshua Colwell, Adrienne Dove, Sumayya Abukhalil, Christopher Cox, Nadia Mohammed

“…In these microgravity conditions, ejecta started to be produced for impacts at > 10 cm/s. …”
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THE FIRST MAXIMUM-LIGHT ULTRAVIOLET THROUGH NEAR-INFRARED SPECTRUM OF A TYPE Ia SUPERNOVA by Foley, Ryan J., Kromer, Markus, Marion, G. Howie, Pignata, Giuliano, Stritzinger, Maximilian D., Taubenberger, Stefan, Challis, Peter, Filippenko, Alexei V., Hillebrandt, Wolfgang, Hsiao, Eric Y., Kirshner, Robert P., Li, Weidong, Morrell, Nidia I., Röpke, Friedrich K., Ciaraldi-Schoolmann, Franco, Seitenzahl, Ivo R., Silverman, Jeffrey M., Simcoe, Robert A., Berta-Thompson, Zach, Ivarsen, Kevin M., Newton, Elisabeth R., Nysewander, Melissa C., Reichart, Daniel E., Folatelli, Gaston

“…We compare SN 2011iv to other SNe Ia with UV spectra near maximum light and examine trends between UV spectral properties, light-curve shape, and ejecta velocity. We tentatively find that SNe with similar light-curve shapes but different ejecta velocities have similar UV spectra, while those with similar ejecta velocities but different light-curve shapes have very different UV spectra. …”
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Phreatic eruption dynamics derived from deposit analysis: a case study from a small, phreatic eruption from Whakāri/White Island, New Zealand by Geoff Kilgour, Stephanie Gates, Ben Kennedy, Aaron Farquhar, Ame McSporran, Cameron Asher

“…Deposit mapping of the pyroclastic surge and directed ballistic ejecta, combined with numerical modelling, is used to constrain the volume of the ejecta and the energetics of the eruption. …”
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Nucleosynthetic Analysis of Three-dimensional Core-collapse Supernova Simulations by Tianshu Wang, Adam Burrows

“…We study in detail the ejecta conditions and theoretical nucleosynthetic results for 18 three-dimensional core-collapse supernova (CCSN) simulations done by F ornax . …”
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Specific interplanetary conditions for CIR-, Sheath-, and ICME-induced geomagnetic storms obtained by double superposed epoch analysis by Yu. I. Yermolaev, N. S. Nikolaeva, I. G. Lodkina, M. Yu. Yermolaev

“…We categorized various large-scale types of solar wind as interplanetary drivers of storms: corotating interaction region (CIR), Sheath, interplanetary CME (ICME) including both magnetic cloud (MC) and Ejecta, separately MC and Ejecta, and "Indeterminate" type. …”
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Origin of calderas: discriminating between collapses and explosions by Izumi Yokoyama

“…It is also emphasized that dynamic pressure ofexplosions is an important factor in the caldera formation, not only volume of the ejecta. To confirm the possibility that volcanic ejecta and edifices collapse into magma reservoirs, we discuss stress propagation from a depleted reservoir upward towards the Earth surface. …”
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Influence of coronal mass ejections on parameters of high-speed solar wind: a case study by Shugay Yulia, Slemzin Vladimir, Rodkin Denis, Yermolaev Yuri, Veselovsky Igor

“…Due to its higher density and magnetic field strength, the complex ejecta became an obstacle for the equatorial flank of the HSS and slowed it down. …”
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Hydrodynamical simulations and similarity relations for eruptive mass-loss from massive stars by Owocki, S, Hirai, R, Podsiadlowski, P, Schneider, F

“…Models with energy added in the core develop a surface shock breakout that propels an initial, higher-speed ejecta ($&gt;$5000km s$^{-1}$), but the bulk of the ejected material still follows the same exponential similarity scalings with ${\bar v} \approx v_{\rm esc}$. …”

Particle-in-cell Simulations of Mildly Relativistic Outflows in Kilonova Emissions by Mohira Rassel, Patrick Kilian, Vito Aberham, Felix Spanier, Nicole Lloyd-Ronning, Chris L. Fryer

“…The low masses and high velocities of the merger ejecta quickly develop conditions where emission from collisionless shocks becomes critical and synchrotron emission from the merger ejecta constitutes a third component to the observed signal. …”
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Constraining Inputs to Realistic Kilonova Simulations through Comparison to Observed r-process Abundances by Marko Ristić, Erika M. Holmbeck, Ryan T. Wollaeger, Oleg Korobkin, Elizabeth Champion, Richard O’Shaughnessy, Chris L. Fryer, Christopher J. Fontes, Matthew R. Mumpower, Trevor M. Sprouse

“…We find that a dynamical ejecta composition calculated using the FRDM2012 nuclear mass and FRLDM fission models with extremely neutron-rich ejecta ( Y _e = 0.035) along with moderately neutron-rich ( Y _e = 0.27) wind ejecta composition yields a wind-to-dynamical mass ratio of M _w / M _d = 0.47, which best matches the observed AT2017gfo kilonova light curves while also producing the best-matching abundance of neutron capture elements in the solar system, though, allowing for systematics, the ratio may be as high as of order unity.…”
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