Magnetar as the Central Engine of AT2018cow: Optical, Soft X-Ray, and Hard X-Ray Emission by Long Li, Shu-Qing Zhong, Di Xiao, Zi-Gao Dai, Shi-Feng Huang, Zhen-Feng Sheng

“…The Markov Chain Monte Carlo fitting results suggest that in order to explain the very short rise time to peak of the thermal optical emission, a low ejecta mass M _ej ≈ 0.1 M _⊙ and high ejecta velocity ${v}_{\mathrm{SN}}\approx 0.17c$ are required. …”
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Systematic Investigation of Very-early-phase Spectra of Type Ia Supernovae by Mao Ogawa, Keiichi Maeda, Miho Kawabata

“…The outer velocity, to which the carbon burning extends, spans the range between ∼20,000 and 25,000 km s ^−1 . The ejecta density of NV SNe also shows a large diversity. …”
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A 3D Numerical Study of Anisotropies in Supernova Remnants by Soham Mandal, Paul C. Duffell, Abigail Polin, Dan Milisavljevic

“…We also study the impact of anisotropies in the ejecta and in the CSM on the power spectra of velocity and density. …”
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Pressure-dependent, infrared-emitting phenomenon in hypervelocity impact by Mihaly, Jonathan M., Tandy, Jonathan D., Rosakis, A. J., Adams, M. A., Pullin, D.

“…For the considered experiments, ejecta and debris speeds are measured between 0.6 and 5.1 km/s. …”
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Impact flash evolution of CO2 ice, water ice and frozen Martian and lunar regolith-simulant targets by Tandy, Jonathan D., Price, Mark, Wozniakiewicz, Penny, Cole, Mike, Alesbrook, Luke, Avdellidou, Chrysa

“…An array of ten band-pass filtered photodiodes and a digital camera monitored changes in the impact flash intensity during the different phases of the emitting ejecta. Early-time emission spectra were also recorded to examine short-lived chemical species within the ejecta. …”
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Modelling the kinematics of the decelerating jets from the black hole X-ray binary MAXI J1348-630 by Carotenuto, F, Tetarenko, AJ, Corbel, S

“…Black hole low mass X-ray binaries (BH LMXBs) can launch powerful outflows in the form of discrete ejecta. Observing the entire trajectory of these ejecta allows us to model their motion with great accuracy and this is essential for measuring their physical properties. …”

The black hole transient MAXI J1348-630: evolution of the compact and transient jets during its 2019/2020 outburst by Carotenuto, F, Corbel, S, Tremou, E, Russell, TD, Tzioumis, A, Fender, RP, Woudt, PA, Motta, SE, Miller-Jones, JCA, Chauhan, J, Tetarenko, AJ, Sivakoff, GR, Heywood, I, Horesh, A, van der Horst, AJ, Koerding, E, Mooley, KP

“…These ejecta displayed the highest proper motion (≳100 mas d-1) ever measured for an accreting BH binary. …”

SN2017ein: bolometric light curve and physical parameters by P.S. Tadjimuratov, D. Mirzakulov

“…Such estimation yields 0.037 M⊙ for nickel-56 mass, 1.246M⊙ for ejected mass and 1.641 · 1051 erg for final kinetic energy of ejecta. Ejecta mass looks very small for proposed progenitor candidate, but some explanations for such discrepancy are already proposed.   …”
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Geochemistry of the Cretaceous-Tertiary transition boundary at Blake Nose (N.W. Atlantic): Cosmogenic Ni by KATJA I. PANOV, MIRJANA S. PAVLOVIC, NIKOLA D. NIKOLIC, PAVLE I. PREMOVIC

“…The Cretaceous-Tertiary (KT) boundary transition at the Blake Nose Plateau recovered by ODP Leg 171B (site 1049, hole A, core 17X, section 2) contains an ejecta bed (thickness ca. 17 cm) marking a late Cretaceous asteroid impact. …”
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Effects of underground explosions on soil and structures by Daniel Ambrosini, Bibiana Luccioni

“…The properties of soil have a significant effect on structures, the ejecta, and the propagation of shock waves in soil. …”
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Impact modification of Mercury's mantle composition by Wahl, Sean M

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The influence of anthropogenic regulation and evaporite dissolution on earthquake-triggered ground failure by Paula Bürgi, Eric M. Thompson, Kate E. Allstadt, Kyle D. Murray, H. Benjamin Mason, Sean K. Ahdi, Devin Katzenstein

“…Abstract Remote sensing observations of Searles Lake following the 2019 moment magnitude 7.1 Ridgecrest, California, earthquake reveal an area where surface ejecta is arranged in a repeating hexagonal pattern that is collocated with a solution-mining operation. …”
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Volcanic Successions of the Jebal Remah Volcano, Northeast Jordan by AHMAD AL-MALABEH

“…Each horizon consists of friable, loose and well bedded ejecta. Agglutination and lithification are limited to the upper horizon. …”
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Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a by Basu, J, Pavana, M, Anupama, GC, Barway, S, Singh, KP, Swain, V, Srivastav, S, Kumar, H, Bhalerao, V, Sonith, LS, Selvakumar, G

“…Spectral modeling indicates an ejecta mass of 10−7–10−8 M ⊙ during each eruption and an enhanced helium abundance. …”

SS433's jet trace from ALMA imaging and global jet watch spectroscopy: evidence for post-launch particle acceleration by Blundell, K, Laing, R, Lee, S, Richards, A

“…We present a comparison of Doppler-shifted Hα line emission observed by the Global Jet Watch from freshly launched jet ejecta at the nucleus of the Galactic microquasar SS433 with subsequent Atacama Large Millimeter/submillimeter Array (ALMA) imaging at mm-wavelengths of the same jet ejecta. …”

KilonovAE: Exploring Kilonova Spectral Features with Autoencoders by N. M. Ford, Nicholas Vieira, John J. Ruan, Daryl Haggard

“…Kilonovae are likely a key site of heavy r -process element production in the Universe, and their optical/infrared spectra contain insights into both the properties of the ejecta and the conditions of the r -process. However, the event GW170817/AT2017gfo is the only kilonova so far with well-observed spectra. …”
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Inhomogeneous Jets from Neutron Star Mergers: One Jet to Rule Them All by Gavin P. Lamb, Lorenzo Nativi, Stephan Rosswog, D. Alexander Kann, Andrew Levan, Christoffer Lundman, Nial Tanvir

“…Using the resultant profiles from 3D hydrodynamic simulations of relativistic jets interacting with neutron star merger wind ejecta, we show how the inhomogeneity of energy and velocity across the jet surface profile can alter the observed afterglow lightcurve. …”
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Outer Van Allen belt trapped and precipitating electron flux responses to two interplanetary magnetic clouds of opposite polarity by H. George, E. Kilpua, A. Osmane, T. Asikainen, M. M. H. Kalliokoski, C. J. Rodger, S. Dubyagin, M. Palmroth

“…The ejecta in the selected ICMEs have magnetic cloud characteristics that exhibit the opposite sense of the rotation of the north–south magnetic field component (<span class="inline-formula"><i>B</i>_<i>Z</i></span>). …”
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PLASMA AND MAGNETIC FIELD CHARACTERISTICS OF SOLAR CORONAL MASS EJECTIONS IN RELATION TO GEOMAGNETIC STORM INTENSITY AND VARIABILITY by Liu, Ying D., Hu, Huidong, Wang, Rui, Yang, Zhongwei, Zhu, Bei, Liu, Yi A., Luhmann, Janet G., Richardson, John D.

“…Key results are obtained concerning how the plasma and magnetic field characteristics of CMEs control the geomagnetic storm intensity and variability: (1) a sheath-ejecta-ejecta mechanism and a sheath-sheath-ejecta scenario are proposed for the multi-step development of the 2015 March 17 and June 22 geomagnetic storms, respectively; (2) two contrasting cases of how the CME flux-rope characteristics generate intense geomagnetic storms are found, which indicates that a southward flux-rope orientation is not a necessity for a strong geomagnetic storm; and (3) the unexpected 2015 March 17 intense geomagnetic storm resulted from the interaction between two successive CMEs plus the compression by a high-speed stream from behind, which is essentially the "perfect storm" scenario proposed by Liu et al. …”
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Self-consistent 3D Radiative Transfer for Kilonovae: Directional Spectra from Merger Simulations by Luke J. Shingles, Christine E. Collins, Vimal Vijayan, Andreas Flörs, Oliver Just, Gerrit Leck, Zewei Xiong, Andreas Bauswein, Gabriel Martínez-Pinedo, Stuart A. Sim

“…However, they evolve on a more rapid timescale, likely due to the low ejecta mass (0.005 M _☉ ) as we take into account only the early ejecta. …”
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