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2. The distribution of impactor core material during large impacts on Earth-like planets

Author

Itcovitz, Jonathan P., Rae, Auriol S. P., Davison, Thomas M., Collins, Gareth S., and Shorttle, Oliver

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Large impacts onto young rocky planets may transform their compositions, creating highly reducing conditions at their surfaces and reintroducing highly siderophile metals to their mantles. Key to these processes is the availability of an impactor's chemically reduced core material (metallic iron). It is, therefore, important to constrain how much of an impactor's core remains accessible to a planet's mantle/surface, how much is sequestered to its core, and how much escapes. Here, we present 3D simulations of such impact scenarios using the shock physics code iSALE to determine the fate of impactor iron. iSALE's inclusion of material strength is vital in capturing the behavior of both solid and fluid components of the planet and thus characterizing iron sequestration to the core. We find that the mass fractions of impactor core material that accretes to the planet core ($f_{core}$) or escapes ($f_{esc}$) can be readily parameterized as a function of a modified specific impact energy, with $f_{core} > f_{esc}$ for a wide set of impacts. These results differ from previous works that do not incorporate material strength. Our work shows that large impacts can place substantial reducing impactor core material in the mantles of young rocky planets. Impact-generated reducing atmospheres may thus be common for such worlds. However, through escape and sequestration to a planet's core, large fractions of an impactor's core can be geochemically hidden from a planet's mantle. Consequently, geochemical estimates of late bombardments of planets based on mantle siderophile element abundances may be underestimates., Comment: Submitted July 25, 2023; Revised October 26, 2023; PSJ

Published
2023
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3. The Winchcombe Fireball -- that Lucky Survivor

Author

McMullan, Sarah, Vida, Denis, Devillepoix, Hadrien A. R., Rowe, Jim, Daly, Luke, King, Ashley J., Cupák, Martin, Howie, Robert M., Sansom, Eleanor K., Shober, Patrick, Towner, Martin C., Anderson, Seamus, McFadden, Luke, Horák, Jana, Smedley, Andrew R. D., Joy, Katherine H., Shuttleworth, Alan, Colas, Francois, Zanda, Brigitte, O'Brien, Áine C., McMullan, Ian, Shaw, Clive, Suttle, Adam, Suttle, Martin D., Young, John S., Campbell-Burns, Peter, Kacerek, Richard, Bassom, Richard, Bosley, Steve, Fleet, Richard, Jones, Dave, McIntyre, Mark, James, Nick, Robson, Derek, Dickinson, Paul, Bland, Philip A., and Collins, Gareth S.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

On February 28, 2021, a fireball dropped $\sim0.6$ kg of recovered CM2 carbonaceous chondrite meteorites in South-West England near the town of Winchcombe. We reconstruct the fireball's atmospheric trajectory, light curve, fragmentation behaviour, and pre-atmospheric orbit from optical records contributed by five networks. The progenitor meteoroid was three orders of magnitude less massive ($\sim13$ kg) than any previously observed carbonaceous fall. The Winchcombe meteorite survived entry because it was exposed to a very low peak atmospheric dynamic pressure ($\sim0.6$ MPa) due to a fortuitous combination of entry parameters, notably low velocity (13.9 km/s). A near-catastrophic fragmentation at $\sim0.07$ MPa points to the body's fragility. Low entry speeds which cause low peak dynamic pressures are likely necessary conditions for a small carbonaceous meteoroid to survive atmospheric entry, strongly constraining the radiant direction to the general antapex direction. Orbital integrations show that the meteoroid was injected into the near-Earth region $\sim0.08$ Myr ago and it never had a perihelion distance smaller than $\sim0.7$ AU, while other CM2 meteorites with known orbits approached the Sun closer ($\sim0.5$ AU) and were heated to at least 100 K higher temperatures., Comment: Accepted for publication in MAPS

Published
2023

4. Momentum Transfer from the DART Mission Kinetic Impact on Asteroid Dimorphos

Author

Cheng, Andrew F., Agrusa, Harrison F., Barbee, Brent W., Meyer, Alex J., Farnham, Tony L., Raducan, Sabina D., Richardson, Derek C., Dotto, Elisabetta, Zinzi, Angelo, Della Corte, Vincenzo, Statler, Thomas S., Chesley, Steven, Naidu, Shantanu P., Hirabayashi, Masatoshi, Li, Jian-Yang, Eggl, Siegfried, Barnouin, Olivier S., Chabot, Nancy L., Chocron, Sidney, Collins, Gareth S., Daly, R. Terik, Davison, Thomas M., DeCoster, Mallory E., Ernst, Carolyn M., Ferrari, Fabio, Graninger, Dawn M., Jacobson, Seth A., Jutzi, Martin, Kumamoto, Kathryn M., Luther, Robert, Lyzhoft, Joshua R., Michel, Patrick, Murdoch, Naomi, Nakano, Ryota, Palmer, Eric, Rivkin, Andrew S., Scheeres, Daniel J., Stickle, Angela M., Sunshine, Jessica M., Trigo-Rodriguez, Josep M., Vincent, Jean-Baptiste, Walker, James D., Wünnemann, Kai, Zhang, Yun, Amoroso, Marilena, Bertini, Ivano, Brucato, John R., Capannolo, Andrea, Cremonese, Gabriele, Dall'Ora, Massimo, Deshapriya, Prasanna J. D., Gai, Igor, Hasselmann, Pedro H., Ieva, Simone, Impresario, Gabriele, Ivanovski, Stavro L., Lavagna, Michèle, Lucchetti, Alice, Epifani, Elena M., Modenini, Dario, Pajola, Maurizio, Palumbo, Pasquale, Perna, Davide, Pirrotta, Simone, Poggiali, Giovanni, Rossi, Alessandro, Tortora, Paolo, Zannoni, Marco, and Zanotti, Giovanni

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The NASA Double Asteroid Redirection Test (DART) mission performed a kinetic impact on asteroid Dimorphos, the satellite of the binary asteroid (65803) Didymos, at 23:14 UTC on September 26, 2022 as a planetary defense test. DART was the first hypervelocity impact experiment on an asteroid at size and velocity scales relevant to planetary defense, intended to validate kinetic impact as a means of asteroid deflection. Here we report the first determination of the momentum transferred to an asteroid by kinetic impact. Based on the change in the binary orbit period, we find an instantaneous reduction in Dimorphos's along-track orbital velocity component of 2.70 +/- 0.10 mm/s, indicating enhanced momentum transfer due to recoil from ejecta streams produced by the impact. For a Dimorphos bulk density range of 1,500 to 3,300 kg/m$^3$, we find that the expected value of the momentum enhancement factor, $\beta$, ranges between 2.2 and 4.9, depending on the mass of Dimorphos. If Dimorphos and Didymos are assumed to have equal densities of 2,400 kg/m$^3$, $\beta$= 3.61 +0.19/-0.25 (1 $\sigma$). These $\beta$ values indicate that significantly more momentum was transferred to Dimorphos from the escaping impact ejecta than was incident with DART. Therefore, the DART kinetic impact was highly effective in deflecting the asteroid Dimorphos., Comment: accepted by Nature

Published
2023
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5. Successful Kinetic Impact into an Asteroid for Planetary Defense

Author

Daly, R. Terik, Ernst, Carolyn M., Barnouin, Olivier S., Chabot, Nancy L., Rivkin, Andrew S., Cheng, Andrew F., Adams, Elena Y., Agrusa, Harrison F., Abel, Elisabeth D., Alford, Amy L., Asphaug, Erik I., Atchison, Justin A., Badger, Andrew R., Baki, Paul, Ballouz, Ronald-L., Bekker, Dmitriy L., Bellerose, Julie, Bhaskaran, Shyam, Buratti, Bonnie J., Cambioni, Saverio, Chen, Michelle H., Chesley, Steven R., Chiu, George, Collins, Gareth S., Cox, Matthew W., DeCoster, Mallory E., Ericksen, Peter S., Espiritu, Raymond C., Faber, Alan S., Farnham, Tony L., Ferrari, Fabio, Fletcher, Zachary J., Gaskell, Robert W., Graninger, Dawn M., Haque, Musad A., Harrington-Duff, Patricia A., Hefter, Sarah, Herreros, Isabel, Hirabayashi, Masatoshi, Huang, Philip M., Hsieh, Syau-Yun W., Jacobson, Seth A., Jenkins, Stephen N., Jensenius, Mark A., John, Jeremy W., Jutzi, Martin, Kohout, Tomas, Krueger, Timothy O., Laipert, Frank E., Lopez, Norberto R., Luther, Robert, Lucchetti, Alice, Mages, Declan M., Marchi, Simone, Martin, Anna C., McQuaide, Maria E., Michel, Patrick, Moskovitz, Nicholas A., Murphy, Ian W., Murdoch, Naomi, Naidu, Shantanu P., Nair, Hari, Nolan, Michael C., Ormö, Jens, Pajola, Maurizio, Palmer, Eric E., Peachey, James M., Pravec, Petr, Raducan, Sabina D., Ramesh, K. T., Ramirez, Joshua R., Reynolds, Edward L., Richman, Joshua E., Robin, Colas Q., Rodriguez, Luis M., Roufberg, Lew M., Rush, Brian P., Sawyer, Carolyn A., Scheeres, Daniel J., Scheirich, Petr, Schwartz, Stephen R., Shannon, Matthew P., Shapiro, Brett N., Shearer, Caitlin E., Smith, Evan J., Steele, R. Joshua, Steckloff, Jordan K, Stickle, Angela M., Sunshine, Jessica M., Superfin, Emil A., Tarzi, Zahi B., Thomas, Cristina A., Thomas, Justin R., Trigo-Rodríguez, Josep M., Tropf, B. Teresa, Vaughan, Andrew T., Velez, Dianna, Waller, C. Dany, Wilson, Daniel S., Wortman, Kristin A., and Zhang, Yun

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

While no known asteroid poses a threat to Earth for at least the next century, the catalog of near-Earth asteroids is incomplete for objects whose impacts would produce regional devastation. Several approaches have been proposed to potentially prevent an asteroid impact with Earth by deflecting or disrupting an asteroid. A test of kinetic impact technology was identified as the highest priority space mission related to asteroid mitigation. NASA's Double Asteroid Redirection Test (DART) mission is the first full-scale test of kinetic impact technology. The mission's target asteroid was Dimorphos, the secondary member of the S-type binary near-Earth asteroid (65803) Didymos. This binary asteroid system was chosen to enable ground-based telescopes to quantify the asteroid deflection caused by DART's impact. While past missions have utilized impactors to investigate the properties of small bodies those earlier missions were not intended to deflect their targets and did not achieve measurable deflections. Here we report the DART spacecraft's autonomous kinetic impact into Dimorphos and reconstruct the impact event, including the timeline leading to impact, the location and nature of the DART impact site, and the size and shape of Dimorphos. The successful impact of the DART spacecraft with Dimorphos and the resulting change in Dimorphos's orbit demonstrates that kinetic impactor technology is a viable technique to potentially defend Earth if necessary., Comment: Accepted by Nature

Published
2023
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6. Effects of impact and target parameters on the results of a kinetic impactor: predictions for the Double Asteroid Redirection Test (DART) mission

Author

Stickle, Angela M., DeCoster, Mallory E., Burger, Christoph, Caldwell, Wendy K., Graninger, Dawn, Kumamoto, Kathryn M., Luther, Robert, Ormö, Jens, Raducan, Sabina, Rainey, Emma, Schäfer, Christoph M., Walker, James D., Zhang, Yun, Michel, Patrick, Owen, J. Michael, Barnouin, Olivier, Cheng, Andy F., Cochron, Sidney, Collins, Gareth S., Davison, Thomas M., Dotto, Elisabetta, Ferrari, Fabio, Herreros, M. Isabel, Ivanovski, Stavro L., Jutzi, Martin, Lucchetti, Alice, Martellato, Elena, Pajola, Maurizio, Plesko, Cathy S., Syal, Megan Bruck, Schwartz, Stephen R., Sunshine, Jessica M., and Wünnemann, Kai

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The Double Asteroid Redirection Test (DART) spacecraft will impact into the asteroid Dimorphos on September 26, 2022 as a test of the kinetic impactor technique for planetary defense. The efficiency of the deflection following a kinetic impactor can be represented using the momentum enhancement factor, Beta, which is dependent on factors such as impact geometry and the specific target material properties. Currently, very little is known about Dimorphos and its material properties that introduces uncertainty in the results of the deflection efficiency observables, including crater formation, ejecta distribution, and Beta. The DART Impact Modeling Working Group (IWG) is responsible for using impact simulations to better understand the results of the DART impact. Pre-impact simulation studies also provide considerable insight into how different properties and impact scenarios affect momentum enhancement following a kinetic impact. This insight provides a basis for predicting the effects of the DART impact and the first understanding of how to interpret results following the encounter. Following the DART impact, the knowledge gained from these studies will inform the initial simulations that will recreate the impact conditions, including providing estimates for potential material properties of Dimorphos and Beta resulting from DARTs impact. This paper summarizes, at a high level, what has been learned from the IWG simulations and experiments in preparation for the DART impact. While unknown, estimates for reasonable potential material properties of Dimorphos provide predictions for Beta of 1-5, depending on end-member cases in the strength regime., Comment: Accepted to PSJ Didymos-DART Focus Issue

Published
2022

8. Newly formed craters on Mars located using seismic and acoustic wave data from InSight

Author

Garcia, Raphael F., Daubar, Ingrid J., Beucler, Éric, Posiolova, Liliya V., Collins, Gareth S., Lognonné, Philippe, Rolland, Lucie, Xu, Zongbo, Wójcicka, Natalia, Spiga, Aymeric, Fernando, Benjamin, Speth, Gunnar, Martire, Léo, Rajšić, Andrea, Miljković, Katarina, Sansom, Eleanor K., Charalambous, Constantinos, Ceylan, Savas, Menina, Sabrina, Margerin, Ludovic, Lapeyre, Rémi, Neidhart, Tanja, Teanby, Nicholas A., Schmerr, Nicholas C., Bonnin, Mickaël, Froment, Marouchka, Clinton, John F., Karatekin, Ozgur, Stähler, Simon C., Dahmen, Nikolaj L., Durán, Cecilia, Horleston, Anna, Kawamura, Taichi, Plasman, Matthieu, Zenhäusern, Géraldine, Giardini, Domenico, Panning, Mark, Malin, Mike, and Banerdt, William Bruce

Published
2022
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11. Seismic constraints from a Mars impact experiment using InSight and Perseverance

Author

Fernando, Benjamin, Wójcicka, Natalia, Maguire, Ross, Stähler, Simon C., Stott, Alexander E., Ceylan, Savas, Charalambous, Constantinos, Clinton, John, Collins, Gareth S., Dahmen, Nikolaj, Froment, Marouchka, Golombek, Matthew, Horleston, Anna, Karatekin, Ozgur, Kawamura, Taichi, Larmat, Carene, Nissen-Meyer, Tarje, Patel, Manish R., Plasman, Matthieu, Posiolova, Lilya, Rolland, Lucie, Spiga, Aymeric, Teanby, Nicholas A., Zenhäusern, Géraldine, Giardini, Domenico, Lognonné, Philippe, Banerdt, Bruce, and Daubar, Ingrid J.

Published
2022
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13. Achievement of the Planetary Defense Investigations of the Double Asteroid Redirection Test (DART) Mission

Author

Chabot, Nancy L., primary, Rivkin, Andrew S., additional, Cheng, Andrew F., additional, Barnouin, Olivier S., additional, Fahnestock, Eugene G., additional, Richardson, Derek C., additional, Stickle, Angela M., additional, Thomas, Cristina A., additional, Ernst, Carolyn M., additional, Terik Daly, R., additional, Dotto, Elisabetta, additional, Zinzi, Angelo, additional, Chesley, Steven R., additional, Moskovitz, Nicholas A., additional, Barbee, Brent W., additional, Abell, Paul, additional, Agrusa, Harrison F., additional, Bannister, Michele T., additional, Beccarelli, Joel, additional, Bekker, Dmitriy L., additional, Bruck Syal, Megan, additional, Buratti, Bonnie J., additional, Busch, Michael W., additional, Campo Bagatin, Adriano, additional, Chatelain, Joseph P., additional, Chocron, Sidney, additional, Collins, Gareth S., additional, Conversi, Luca, additional, Davison, Thomas M., additional, DeCoster, Mallory E., additional, Prasanna Deshapriya, J. D., additional, Eggl, Siegfried, additional, Espiritu, Raymond C., additional, Farnham, Tony L., additional, Ferrais, Marin, additional, Ferrari, Fabio, additional, Föhring, Dora, additional, Fuentes-Muñoz, Oscar, additional, Gai, Igor, additional, Giordano, Carmine, additional, Glenar, David A., additional, Gomez, Edward, additional, Graninger, Dawn M., additional, Green, Simon F., additional, Greenstreet, Sarah, additional, Hasselmann, Pedro H., additional, Herreros, Isabel, additional, Hirabayashi, Masatoshi, additional, Husárik, Marek, additional, Ieva, Simone, additional, Ivanovski, Stavro L., additional, Jackson, Samuel L., additional, Jehin, Emmanuel, additional, Jutzi, Martin, additional, Karatekin, Ozgur, additional, Knight, Matthew M., additional, Kolokolova, Ludmilla, additional, Kumamoto, Kathryn M., additional, Küppers, Michael, additional, La Forgia, Fiorangela, additional, Lazzarin, Monica, additional, Li, Jian-Yang, additional, Lister, Tim A., additional, Lolachi, Ramin, additional, Lucas, Michael P., additional, Lucchetti, Alice, additional, Luther, Robert, additional, Makadia, Rahil, additional, Mazzotta Epifani, Elena, additional, McMahon, Jay, additional, Merisio, Gianmario, additional, Merrill, Colby C., additional, Meyer, Alex J., additional, Michel, Patrick, additional, Micheli, Marco, additional, Migliorini, Alessandra, additional, Minker, Kate, additional, Modenini, Dario, additional, Moreno, Fernando, additional, Murdoch, Naomi, additional, Murphy, Brian, additional, Naidu, Shantanu P., additional, Nair, Hari, additional, Nakano, Ryota, additional, Opitom, Cyrielle, additional, Ormö, Jens, additional, Michael Owen, J., additional, Pajola, Maurizio, additional, Palmer, Eric E., additional, Palumbo, Pasquale, additional, Panicucci, Paolo, additional, Parro, Laura M., additional, Pearl, Jason M., additional, Penttilä, Antti, additional, Perna, Davide, additional, Petrescu, Elisabeta, additional, Pravec, Petr, additional, Raducan, Sabina D., additional, Ramesh, K. T., additional, Ridden-Harper, Ryan, additional, Rizos, Juan L., additional, Rossi, Alessandro, additional, Roth, Nathan X., additional, Rożek, Agata, additional, Rozitis, Benjamin, additional, Ryan, Eileen V., additional, Ryan, William H., additional, Sánchez, Paul, additional, Santana-Ros, Toni, additional, Scheeres, Daniel J., additional, Scheirich, Peter, additional, Berk Senel, Cem, additional, Snodgrass, Colin, additional, Soldini, Stefania, additional, Souami, Damya, additional, Statler, Thomas S., additional, Street, Rachel, additional, Stubbs, Timothy J., additional, Sunshine, Jessica M., additional, Tan, Nicole J., additional, Tancredi, Gonzalo, additional, Tinsman, Calley L., additional, Tortora, Paolo, additional, Tusberti, Filippo, additional, Walker, James D., additional, Waller, C. Dany, additional, Wünnemann, Kai, additional, Zannoni, Marco, additional, and Zhang, Yun, additional

Published
2024
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14. Mesoscale Modeling of Impact Compaction of Primitive Solar System Solids

Author

Davison, Thomas M, Collins, Gareth S, and Bland, Philip A

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

We have developed a method for simulating the mesoscale compaction of early solar system solids in low velocity impact events, using the iSALE shock physics code. Chondrules are represented by nonporous disks, placed within a porous matrix. By simulating impacts into bimodal mixtures over a wide range of parameter space (including the chondrule-to-matrix ratio, the matrix porosity and composition and the impact velocity), we have shown how each of these parameters influences the shock processing of heterogeneous materials. The temperature after shock processing shows a strong dichotomy: matrix temperatures are elevated much higher than the chondrules, which remain largely cold. Chondrules can protect some matrix from shock compaction, with shadow regions in the lee side of chondrules exhibiting higher porosity that elsewhere in the matrix. Using the results from this mesoscale modelling, we show how the $\varepsilon-\alpha$ porous compaction model parameters depend on initial bulk porosity. We also show that the timescale for the temperature dichotomy to equilibrate is highly dependent on the porosity of the matrix after the shock, and will be on the order of seconds for matrix porosities of less than 0.1, and on the order of 10's to 100's seconds for matrix porosities of $\sim$ 0.3--0.5. Finally, we have shown that the composition of the post-shock material is able to match the bulk porosity and chondrule-to-matrix ratios of meteorite groups such as carbonaceous chondrites and unequilibrated ordinary chondrites., Comment: 18 pages, 16 figures, 4 tables. Accepted for publication in ApJ

Published
2016
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16. The fusion crust of the Winchcombe meteorite: A preserved record of atmospheric entry processes.

Author

Genge, Matthew J., Alesbrook, Luke, Almeida, Natasha V., Bates, Helena C., Bland, Phil A., Boyd, Mark R., Burchell, Mark J., Collins, Gareth S., Cornwell, Luke T., Daly, Luke, Devillepoix, Hadrien A. R., van Ginneken, Matthias, Greshake, Ansgar, Hallatt, Daniel, Hamann, Christopher, Hecht, Lutz, Jenkins, Laura E., Johnson, Diane, Jones, Rosie, and King, Ashley J.

Subjects
METEORITES, CHONDRITES, PHENOCRYSTS, MARTIAN meteorites, OLIVINE, STELLAR oscillations
Abstract

Fusion crusts form during the atmospheric entry heating of meteorites and preserve a record of the conditions that occurred during deceleration in the atmosphere. The fusion crust of the Winchcombe meteorite closely resembles that of other stony meteorites, and in particular CM2 chondrites, since it is dominated by olivine phenocrysts set in a glassy mesostasis with magnetite, and is highly vesicular. Dehydration cracks are unusually abundant in Winchcombe. Failure of this weak layer is an additional ablation mechanism to produce large numbers of particles during deceleration, consistent with the observation of pulses of plasma in videos of the Winchcombe fireball. Calving events might provide an observable phenomenon related to meteorites that are particularly susceptible to dehydration. Oscillatory zoning is observed within olivine phenocrysts in the fusion crust, in contrast to other meteorites, perhaps owing to temperature fluctuations resulting from calving events. Magnetite monolayers are found in the crust, and have also not been previously reported, and form discontinuous strata. These features grade into magnetite rims formed on the external surface of the crust and suggest the trapping of surface magnetite by collapse of melt. Magnetite monolayers may be a feature of meteorites that undergo significant degassing. Silicate warts with dendritic textures were observed and are suggested to be droplets ablated from another stone in the shower. They, therefore, represent the first evidence for intershower transfer of ablation materials and are consistent with the other evidence in the Winchcombe meteorite for unusually intense gas loss and ablation, despite its low entry velocity. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Planetary Impact Processes in Porous Materials

Author

Collins, Gareth S., Housen, Kevin R., Jutzi, Martin, Nakamura, Akiko M., Graham, Robert A., Founding Editor, Davison, Lee, Honorary Editor, Horie, Yasuyuki, Honorary Editor, Ben-Dor, Gabi, Series Editor, Lu, Frank K., Series Editor, Thadhani, Naresh, Series Editor, Vogler, Tracy J., editor, and Fredenburg, D. Anthony, editor

Published
2019
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21. The first day of the Cenozoic

Author

Expedition 364 Scientists, Gulick, Sean P. S., Bralower, Timothy J., Ormö, Jens, Hall, Brendon, Grice, Kliti, Schaefer, Bettina, Lyons, Shelby, Freeman, Katherine H., Morgan, Joanna V., Artemieva, Natalia, Kaskes, Pim, de Graaff, Sietze J., Whalen, Michael T., Collins, Gareth S., Tikoo, Sonia M., Verhagen, Christina, Christeson, Gail L., Claeys, Philippe, Coolen, Marco J. L., Goderis, Steven, Goto, Kazuhisa, Grieve, Richard A. F., McCall, Naoma, Osinski, Gordon R., Rae, Auriol S. P., Riller, Ulrich, Smit, Jan, Vajda, Vivi, and Wittmann, Axel

Published
2019

22. Initial results from the InSight mission on Mars

Author

Banerdt, W. Bruce, Smrekar, Suzanne E., Banfield, Don, Giardini, Domenico, Golombek, Matthew, Johnson, Catherine L., Lognonné, Philippe, Spiga, Aymeric, Spohn, Tilman, Perrin, Clément, Stähler, Simon C., Antonangeli, Daniele, Asmar, Sami, Beghein, Caroline, Bowles, Neil, Bozdag, Ebru, Chi, Peter, Christensen, Ulrich, Clinton, John, Collins, Gareth S., Daubar, Ingrid, Dehant, Véronique, Drilleau, Mélanie, Fillingim, Matthew, Folkner, William, Garcia, Raphaël F., Garvin, Jim, Grant, John, Grott, Matthias, Grygorczuk, Jerzy, Hudson, Troy, Irving, Jessica C. E., Kargl, Günter, Kawamura, Taichi, Kedar, Sharon, King, Scott, Knapmeyer-Endrun, Brigitte, Knapmeyer, Martin, Lemmon, Mark, Lorenz, Ralph, Maki, Justin N., Margerin, Ludovic, McLennan, Scott M., Michaut, Chloe, Mimoun, David, Mittelholz, Anna, Mocquet, Antoine, Morgan, Paul, Mueller, Nils T., Murdoch, Naomi, Nagihara, Seiichi, Newman, Claire, Nimmo, Francis, Panning, Mark, Pike, W. Thomas, Plesa, Ana-Catalina, Rodriguez, Sébastien, Rodriguez-Manfredi, Jose Antonio, Russell, Christopher T., Schmerr, Nicholas, Siegler, Matt, Stanley, Sabine, Stutzmann, Eléanore, Teanby, Nicholas, Tromp, Jeroen, van Driel, Martin, Warner, Nicholas, Weber, Renee, and Wieczorek, Mark

Published
2020
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24. Two Seismic Events from InSight Confirmed as New Impacts on Mars

Author

Daubar, Ingrid J., primary, Fernando, Benjamin A., additional, Garcia, Raphaël F., additional, Grindrod, Peter M., additional, Zenhäusern, Géraldine, additional, Wójcicka, Natalia, additional, Teanby, Nicholas A., additional, Stähler, Simon C., additional, Posiolova, Liliya, additional, Horleston, Anna C., additional, Collins, Gareth S., additional, Charalambous, Constantinos, additional, Clinton, John, additional, Banks, Maria E., additional, Froment, Marouchka, additional, Lognonné, Philippe, additional, Panning, Mark, additional, and Banerdt, W. Bruce, additional

Published
2023
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26. The Winchcombe fireball—That lucky survivor

Author

McMullan, Sarah, primary, Vida, Denis, additional, Devillepoix, Hadrien A. R., additional, Rowe, Jim, additional, Daly, Luke, additional, King, Ashley J., additional, Cupák, Martin, additional, Howie, Robert M., additional, Sansom, Eleanor K., additional, Shober, Patrick, additional, Towner, Martin C., additional, Anderson, Seamus, additional, McFadden, Luke, additional, Horák, Jana, additional, Smedley, Andrew R. D., additional, Joy, Katherine H., additional, Shuttleworth, Alan, additional, Colas, Francois, additional, Zanda, Brigitte, additional, O'Brien, Áine C., additional, McMullan, Ian, additional, Shaw, Clive, additional, Suttle, Adam, additional, Suttle, Martin D., additional, Young, John S., additional, Campbell‐Burns, Peter, additional, Kacerek, Richard, additional, Bassom, Richard, additional, Bosley, Steve, additional, Fleet, Richard, additional, Jones, Dave, additional, McIntyre, Mark, additional, James, Nick, additional, Robson, Derek, additional, Dickinson, Paul, additional, Bland, Philip A., additional, and Collins, Gareth S., additional

Published
2023
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27. The formation of peak rings in large impact craters

Author

Morgan, Joanna V., Gulick, Sean P. S., Bralower, Timothy, Chenot, Elise, Christeson, Gail, Claeys, Philippe, Cockell, Charles, Collins, Gareth S., Coolen, Marco J. L., Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Jones, Heather, Kring, David A., Le Ber, Erwan, Lofi, Johanna, Long, Xiao, Lowery, Christopher, Mellett, Claire, Ocampo-Torres, Rubén, Osinski, Gordon R., Perez-Cruz, Ligia, Pickersgill, Annemarie, Poelchau, Michael, Rae, Auriol, Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, Honami, Schmitt, Douglas R., Smit, Jan, Tikoo, Sonia, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael, Wittmann, Axel, Yamaguchi, Kosei E., and Zylberman, William

Published
2016

28. The Winchcombe meteorite, a unique and pristine witness from the outer solar system

Author

King, Ashley J, Daly, Luke, Rowe, James, Joy, Katherine H, Greenwood, Richard C, Devillepoix, Hadrien AR, Suttle, Martin D, Chan, Queenie HS, Russell, Sara S, Bates, Helena C, Bryson, James FJ, Clay, Patricia L, Vida, Denis, Lee, Martin R, O'Brien, Áine, Hallis, Lydia J, Stephen, Natasha R, Tartèse, Romain, Sansom, Eleanor K, Towner, Martin C, Cupak, Martin, Shober, Patrick M, Bland, Phil A, Findlay, Ross, Franchi, Ian A, Verchovsky, Alexander B, Abernethy, Feargus AJ, Grady, Monica M, Floyd, Cameron J, Van Ginneken, Matthias, Bridges, John, Hicks, Leon J, Jones, Rhian H, Mitchell, Jennifer T, Genge, Matthew J, Jenkins, Laura, Martin, Pierre-Etienne, Sephton, Mark A, Watson, Jonathan S, Salge, Tobias, Shirley, Katherine A, Curtis, Rowan J, Warren, Tristram J, Bowles, Neil E, Stuart, Finlay M, Di Nicola, Luigia, Györe, Domokos, Boyce, Adrian J, Shaw, Kathryn MM, Elliott, Tim, Steele, Robert CJ, Povinec, Pavel, Laubenstein, Matthias, Sanderson, David, Cresswell, Alan, Jull, Anthony JT, Sýkora, Ivan, Sridhar, Sanjana, Harrison, Richard J, Willcocks, Francesca M, Harrison, Catherine S, Hallatt, Daniel, Wozniakiewicz, Penny J, Burchell, Mark J, Alesbrook, Luke S, Dignam, Aishling, Almeida, Natasha V, Smith, Caroline L, Clark, Brett, Humphreys-Williams, Emma R, Schofield, Paul F, Cornwell, Luke T, Spathis, Vassilia, Morgan, Geraint H, Perkins, Mark J, Kacerek, Richard, Campbell-Burns, Peter, Colas, Francois, Zanda, Brigitte, Vernazza, Pierre, Bouley, Sylvain, Jeanne, Simon, Hankey, Mike, Collins, Gareth S, Young, John S, Shaw, Clive, Horak, Jana, Jones, Dave, James, Nick, Bosley, Steve, Shuttleworth, Alan, Dickinson, Paul, McMullan, Ian, Robson, Derek, Smedley, Andrew RD, Stanley, Ben, Bassom, Richard, McIntyre, Mark, Suttle, Adam A, Fleet, Richard, Bastiaens, Luc, Ihász, Míra B, McMullan, Sarah, Boazman, Sarah J, Dickeson, Zach I, Grindrod, Peter M, Pickersgill, Annemarie E, Weir, Colin J, Suttle, Fiona M, Farrelly, Sarah, Spencer, Ieun, Naqvi, Sheeraz, Mayne, Ben, Skilton, Dan, Kirk, Dan, Mounsey, Ann, Mounsey, Sally E, Mounsey, Sarah, Godfrey, Pamela, Bond, Lachlan, Bond, Victoria, Wilcock, Cathryn, Wilcock, Hannah, Wilcock, Rob, King, Ashley J [0000-0001-6113-5417], Daly, Luke [0000-0002-7150-4092], Joy, Katherine H [0000-0003-4992-8750], Greenwood, Richard C [0000-0002-5544-8027], Devillepoix, Hadrien AR [0000-0001-9226-1870], Suttle, Martin D [0000-0001-7165-2215], Chan, Queenie HS [0000-0001-7205-8699], Russell, Sara S [0000-0001-5531-7847], Bates, Helena C [0000-0002-0469-9483], Bryson, James FJ [0000-0002-5675-8545], Vida, Denis [0000-0003-4166-8704], Lee, Martin R [0000-0002-6004-3622], O'Brien, Áine [0000-0002-2591-7902], Hallis, Lydia J [0000-0001-6455-8415], Stephen, Natasha R [0000-0003-3952-922X], Tartèse, Romain [0000-0002-3490-9875], Sansom, Eleanor K [0000-0003-2702-673X], Towner, Martin C [0000-0002-8240-4150], Cupak, Martin [0000-0003-2193-0867], Shober, Patrick M [0000-0003-4766-2098], Bland, Phil A [0000-0002-4681-7898], Findlay, Ross [0000-0001-7794-1819], Franchi, Ian A [0000-0003-4151-0480], Verchovsky, Alexander B [0000-0002-3532-5003], Abernethy, Feargus AJ [0000-0001-7210-3058], Grady, Monica M [0000-0002-4055-533X], Floyd, Cameron J [0000-0001-5986-491X], Van Ginneken, Matthias [0000-0002-2508-7021], Bridges, John [0000-0002-9579-5779], Hicks, Leon J [0000-0002-2464-0948], Jones, Rhian H [0000-0001-8238-9379], Mitchell, Jennifer T [0000-0002-5922-2463], Genge, Matthew J [0000-0002-9528-5971], Jenkins, Laura [0000-0003-0886-8667], Martin, Pierre-Etienne [0000-0003-1848-9695], Sephton, Mark A [0000-0002-2190-5402], Watson, Jonathan S [0000-0003-0354-1729], Salge, Tobias [0000-0002-4414-4917], Shirley, Katherine A [0000-0003-0669-7497], Curtis, Rowan J [0000-0002-9554-3053], Warren, Tristram J [0000-0003-3877-0046], Bowles, Neil E [0000-0001-5400-1461], Stuart, Finlay M [0000-0002-6395-7868], Di Nicola, Luigia [0000-0002-7596-474X], Györe, Domokos [0000-0003-4438-8361], Boyce, Adrian J [0000-0002-9680-0787], Shaw, Kathryn MM [0000-0002-3847-9382], Elliott, Tim [0000-0002-0984-0191], Steele, Robert CJ [0000-0003-1406-6855], Povinec, Pavel [0000-0003-0275-794X], Laubenstein, Matthias [0000-0001-5390-4343], Sanderson, David [0000-0002-9615-4412], Cresswell, Alan [0000-0002-5100-8075], Jull, Anthony JT [0000-0002-4079-4947], Sýkora, Ivan [0000-0003-3447-5621], Sridhar, Sanjana [0000-0003-1179-2093], Harrison, Richard J [0000-0003-3469-762X], Willcocks, Francesca M [0000-0002-3726-0258], Hallatt, Daniel [0000-0002-4426-9891], Wozniakiewicz, Penny J [0000-0002-1441-4883], Burchell, Mark J [0000-0002-2680-8943], Alesbrook, Luke S [0000-0001-9892-281X], Dignam, Aishling [0000-0001-5408-9061], Almeida, Natasha V [0000-0003-4871-8225], Smith, Caroline L [0000-0001-7005-6470], Humphreys-Williams, Emma R [0000-0002-1397-5785], Schofield, Paul F [0000-0003-0902-0588], Cornwell, Luke T [0000-0003-1428-2160], Spathis, Vassilia [0000-0002-5745-4383], Morgan, Geraint H [0000-0002-7580-6880], Campbell-Burns, Peter [0000-0001-8544-728X], Zanda, Brigitte [0000-0002-4210-7151], Vernazza, Pierre [0000-0002-2564-6743], Bouley, Sylvain [0000-0003-0377-5517], Collins, Gareth S [0000-0002-6087-6149], Young, John S [0000-0001-6583-7643], Horak, Jana [0000-0002-0492-2235], Jones, Dave [0000-0002-7215-0521], Bosley, Steve [0000-0002-9478-8518], Dickinson, Paul [0000-0003-0078-0919], McMullan, Ian [0000-0002-5579-8115], Robson, Derek [0000-0001-7807-9853], Smedley, Andrew RD [0000-0001-7137-6628], McIntyre, Mark [0000-0002-5769-4280], Suttle, Adam A [0000-0002-6075-976X], Fleet, Richard [0000-0002-8366-7673], McMullan, Sarah [0000-0002-7194-6317], Boazman, Sarah J [0000-0003-4694-0818], Dickeson, Zach I [0000-0001-9116-2571], Grindrod, Peter M [0000-0002-0934-5131], Pickersgill, Annemarie E [0000-0001-5452-2849], Suttle, Fiona M [0000-0003-1970-0034], Wilcock, Cathryn [0000-0001-7731-2860], Wilcock, Hannah [0000-0002-1043-2267], Wilcock, Rob [0000-0001-8977-7956], Apollo - University of Cambridge Repository, Science and Technology Facilities Council (STFC), and University of St Andrews. School of Earth & Environmental Sciences

Subjects
MCC, QC Physics, Multidisciplinary, 5101 Astronomical Sciences, NDAS, QB Astronomy, 37 Earth Sciences, 3705 Geology, 5109 Space Sciences, 51 Physical Sciences, QC, QB
Abstract

Funding: This study was supported by urgency funding from the U.K.’s Science and Technology Facilities Council (STFC) as part of the project “Curation and Preliminary Examination of the Winchcombe Carbonaceous Chondrite Fall.” Additional work was funded by STFC through grants ST/N000846/1, ST/T002328/1, ST/T506096/1, and ST/W001128/1 (to L.D., M.R.L., and L.J.Ha.); ST/V000675/1 (to K.H.J. and R.H.J.); ST/P005225/1 (to R.T.); ST/S000348/1 (to M.V.G., P.J.W., and M.J.B.); ST/R00143X/1 (to J.B. and L.J.Hi.); ST/S000615/1 (to G.S.C.); ST/V000799/1 (to P.G.); and ST/V000888/1 (to T.E.). A.J.K. and H.C.B. acknowledge funding support from UK Research and Innovation (UKRI) grant MR/T020261/1. P.L.C. acknowledges funding support from UKRI grant MR/S03465X/1. K.H.J. acknowledges funding support from the Royal Society, grant URF\R\201009. L.J.Ha. and M.R.L. acknowledge funding from Natural Environment Research Council (NERC) National Environmental Isotope Facility (NEIF) grant no. 2406.0321. L.D., M.R.L., and L.J.Ha. acknowledge COVID-19 funding support from the University of Glasgow, UK. D.V. was supported in part by NASA cooperative agreement 80NSSC21M0073. P.P. and I.Sy. acknowledge funding from the VEGA agency, project no.1/0421/20. A.J.T.J. acknowledges support from the European Union and the State of Hungary, cofinanced by the European Regional Development Fund in the project of GINOP-2.3.2-15-2016-00009 “ICER.” P.M.S. acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 945298. FRIPON was initiated by funding from ANR (grant N.13-BS05-0009-03), carried out by the Paris Observatory, Muséum National d’Histoire Naturelle, Paris-Saclay University, and Institut Pythéas (LAM-CEREGE). FRIPON data are hosted and processed at Institut Pythéas SIP (Service Informatique Pythéas). The Desert Fireball Network team and Global Fireball Observatory are funded by the Australian Research Council (DP200102073). Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is the most accurately recorded carbonaceous chondrite fall. Its pre-atmospheric orbit and cosmic-ray exposure age confirm that it arrived on Earth shortly after ejection from a primitive asteroid. Recovered only hours after falling, the composition of the Winchcombe meteorite is largely unmodified by the terrestrial environment. It contains abundant hydrated silicates formed during fluid-rock reactions, and carbon- and nitrogen-bearing organic matter including soluble protein amino acids. The near-pristine hydrogen isotopic composition of the Winchcombe meteorite is comparable to the terrestrial hydrosphere, providing further evidence that volatile-rich carbonaceous asteroids played an important role in the origin of Earth's water. Publisher PDF

Published
2022

31. Successful kinetic impact into an asteroid for planetary defence

Author

Daly, R. Terik, primary, Ernst, Carolyn M., additional, Barnouin, Olivier S., additional, Chabot, Nancy L., additional, Rivkin, Andrew S., additional, Cheng, Andrew F., additional, Adams, Elena Y., additional, Agrusa, Harrison F., additional, Abel, Elisabeth D., additional, Alford, Amy L., additional, Asphaug, Erik I., additional, Atchison, Justin A., additional, Badger, Andrew R., additional, Baki, Paul, additional, Ballouz, Ronald-L., additional, Bekker, Dmitriy L., additional, Bellerose, Julie, additional, Bhaskaran, Shyam, additional, Buratti, Bonnie J., additional, Cambioni, Saverio, additional, Chen, Michelle H., additional, Chesley, Steven R., additional, Chiu, George, additional, Collins, Gareth S., additional, Cox, Matthew W., additional, DeCoster, Mallory E., additional, Ericksen, Peter S., additional, Espiritu, Raymond C., additional, Faber, Alan S., additional, Farnham, Tony L., additional, Ferrari, Fabio, additional, Fletcher, Zachary J., additional, Gaskell, Robert W., additional, Graninger, Dawn M., additional, Haque, Musad A., additional, Harrington-Duff, Patricia A., additional, Hefter, Sarah, additional, Herreros, Isabel, additional, Hirabayashi, Masatoshi, additional, Huang, Philip M., additional, Hsieh, Syau-Yun W., additional, Jacobson, Seth A., additional, Jenkins, Stephen N., additional, Jensenius, Mark A., additional, John, Jeremy W., additional, Jutzi, Martin, additional, Kohout, Tomas, additional, Krueger, Timothy O., additional, Laipert, Frank E., additional, Lopez, Norberto R., additional, Luther, Robert, additional, Lucchetti, Alice, additional, Mages, Declan M., additional, Marchi, Simone, additional, Martin, Anna C., additional, McQuaide, Maria E., additional, Michel, Patrick, additional, Moskovitz, Nicholas A., additional, Murphy, Ian W., additional, Murdoch, Naomi, additional, Naidu, Shantanu P., additional, Nair, Hari, additional, Nolan, Michael C., additional, Ormö, Jens, additional, Pajola, Maurizio, additional, Palmer, Eric E., additional, Peachey, James M., additional, Pravec, Petr, additional, Raducan, Sabina D., additional, Ramesh, K. T., additional, Ramirez, Joshua R., additional, Reynolds, Edward L., additional, Richman, Joshua E., additional, Robin, Colas Q., additional, Rodriguez, Luis M., additional, Roufberg, Lew M., additional, Rush, Brian P., additional, Sawyer, Carolyn A., additional, Scheeres, Daniel J., additional, Scheirich, Petr, additional, Schwartz, Stephen R., additional, Shannon, Matthew P., additional, Shapiro, Brett N., additional, Shearer, Caitlin E., additional, Smith, Evan J., additional, Steele, R. Joshua, additional, Steckloff, Jordan K., additional, Stickle, Angela M., additional, Sunshine, Jessica M., additional, Superfin, Emil A., additional, Tarzi, Zahi B., additional, Thomas, Cristina A., additional, Thomas, Justin R., additional, Trigo-Rodríguez, Josep M., additional, Tropf, B. Teresa, additional, Vaughan, Andrew T., additional, Velez, Dianna, additional, Waller, C. Dany, additional, Wilson, Daniel S., additional, Wortman, Kristin A., additional, and Zhang, Yun, additional

Published
2023
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32. Momentum transfer from the DART mission kinetic impact on asteroid Dimorphos

Author

Cheng, Andrew F., primary, Agrusa, Harrison F., additional, Barbee, Brent W., additional, Meyer, Alex J., additional, Farnham, Tony L., additional, Raducan, Sabina D., additional, Richardson, Derek C., additional, Dotto, Elisabetta, additional, Zinzi, Angelo, additional, Della Corte, Vincenzo, additional, Statler, Thomas S., additional, Chesley, Steven, additional, Naidu, Shantanu P., additional, Hirabayashi, Masatoshi, additional, Li, Jian-Yang, additional, Eggl, Siegfried, additional, Barnouin, Olivier S., additional, Chabot, Nancy L., additional, Chocron, Sidney, additional, Collins, Gareth S., additional, Daly, R. Terik, additional, Davison, Thomas M., additional, DeCoster, Mallory E., additional, Ernst, Carolyn M., additional, Ferrari, Fabio, additional, Graninger, Dawn M., additional, Jacobson, Seth A., additional, Jutzi, Martin, additional, Kumamoto, Kathryn M., additional, Luther, Robert, additional, Lyzhoft, Joshua R., additional, Michel, Patrick, additional, Murdoch, Naomi, additional, Nakano, Ryota, additional, Palmer, Eric, additional, Rivkin, Andrew S., additional, Scheeres, Daniel J., additional, Stickle, Angela M., additional, Sunshine, Jessica M., additional, Trigo-Rodriguez, Josep M., additional, Vincent, Jean-Baptiste, additional, Walker, James D., additional, Wünnemann, Kai, additional, Zhang, Yun, additional, Amoroso, Marilena, additional, Bertini, Ivano, additional, Brucato, John R., additional, Capannolo, Andrea, additional, Cremonese, Gabriele, additional, Dall’Ora, Massimo, additional, Deshapriya, Prasanna J. D., additional, Gai, Igor, additional, Hasselmann, Pedro H., additional, Ieva, Simone, additional, Impresario, Gabriele, additional, Ivanovski, Stavro L., additional, Lavagna, Michèle, additional, Lucchetti, Alice, additional, Epifani, Elena M., additional, Modenini, Dario, additional, Pajola, Maurizio, additional, Palumbo, Pasquale, additional, Perna, Davide, additional, Pirrotta, Simone, additional, Poggiali, Giovanni, additional, Rossi, Alessandro, additional, Tortora, Paolo, additional, Zannoni, Marco, additional, and Zanotti, Giovanni, additional

Published
2023
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33. The fusion crust of the Winchcombe meteorite: A preserved record of atmospheric entry processes

Author

Genge, Matthew J., Alesbrook, Luke, Almeida, Natasha V., Bates, Helena C., Bland, Phil A., Boyd, Mark R., Burchell, Mark J., Collins, Gareth S., Cornwell, Luke.T., Daly, Luke, Devillepoix, Hadrien A. R., van Ginneken, Matthias, Greshake, Ansgar, Hallatt, Daniel, Hamann, Christopher, Hecht, Lutz, Jenkins, Laura E., Johnson, Diane, Jones, Rosie, King, Ashley J., Mansour, Haithem, McMullan, Sarah, Mitchell, Jennifer T., Rollinson, Gavyn, Russell, Sara S., Schröder, Christian, Stephen, Natasha R., Suttle, Martin D., Tandy, Jon D., Trimby, Patrick, Sansom, Eleanor K., Spathis, Vassilia, Willcocks, Francesca M., Wozniakiewicz, Penelope J., Genge, Matthew J., Alesbrook, Luke, Almeida, Natasha V., Bates, Helena C., Bland, Phil A., Boyd, Mark R., Burchell, Mark J., Collins, Gareth S., Cornwell, Luke.T., Daly, Luke, Devillepoix, Hadrien A. R., van Ginneken, Matthias, Greshake, Ansgar, Hallatt, Daniel, Hamann, Christopher, Hecht, Lutz, Jenkins, Laura E., Johnson, Diane, Jones, Rosie, King, Ashley J., Mansour, Haithem, McMullan, Sarah, Mitchell, Jennifer T., Rollinson, Gavyn, Russell, Sara S., Schröder, Christian, Stephen, Natasha R., Suttle, Martin D., Tandy, Jon D., Trimby, Patrick, Sansom, Eleanor K., Spathis, Vassilia, Willcocks, Francesca M., and Wozniakiewicz, Penelope J.

Abstract

Fusion crusts form during the atmospheric entry heating of meteorites and preserve a record of the conditions that occurred during deceleration in the atmosphere. The fusion crust of the Winchcombe meteorite closely resembles that of other stony meteorites, and in particular CM2 chondrites, since it is dominated by olivine phenocrysts set in a glassy mesostasis with magnetite, and is highly vesicular. Dehydration cracks are unusually abundant in Winchcombe. Failure of this weak layer is an additional ablation mechanism to produce large numbers of particles during deceleration, consistent with the observation of pulses of plasma in videos of the Winchcombe fireball. Calving events might provide an observable phenomenon related to meteorites that are particularly susceptible to dehydration. Oscillatory zoning is observed within olivine phenocrysts in the fusion crust, in contrast to other meteorites, perhaps owing to temperature fluctuations resulting from calving events. Magnetite monolayers are found in the crust, and have also not been previously reported, and form discontinuous strata. These features grade into magnetite rims formed on the external surface of the crust and suggest the trapping of surface magnetite by collapse of melt. Magnetite monolayers may be a feature of meteorites that undergo significant degassing. Silicate warts with dendritic textures were observed and are suggested to be droplets ablated from another stone in the shower. They, therefore, represent the first evidence for intershower transfer of ablation materials and are consistent with the other evidence in the Winchcombe meteorite for unusually intense gas loss and ablation, despite its low entry velocity.

Published
2023

37. Formation of the Orientale lunar multiring basin

Author

Johnson, Brandon C., Blair, David M., Collins, Gareth S., Melosh, H. Jay, Freed, Andrew M., Taylor, G. Jeffrey, Head, James W., Wieczorek, Mark A., Andrews-Hanna, Jeffrey C., Nimmo, Francis, Keane, James T., Miljković, Katarina, Soderblom, Jason M., and Zuber, Maria T.

Published
2016

39. A Large New Crater Exposes the Limits of Water Ice on Mars

Author

Dundas, Colin M., primary, Mellon, Michael T., additional, Posiolova, Liliya V., additional, Miljković, Katarina, additional, Collins, Gareth S., additional, Tornabene, Livio L., additional, Rangarajan, Vidhya Ganesh, additional, Golombek, Matthew P., additional, Warner, Nicholas H., additional, Daubar, Ingrid J., additional, Byrne, Shane, additional, McEwen, Alfred S., additional, Seelos, Kimberly D., additional, Viola, Donna, additional, Bramson, Ali M., additional, and Speth, Gunnar, additional

Published
2023
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40. The fusion crust of the Winchcombe meteorite: A preserved record of atmospheric entry processes

Author

Genge, Matthew J., primary, Alesbrook, Luke, additional, Almeida, Natasha V., additional, Bates, Helena C., additional, Bland, Phil A., additional, Boyd, Mark R., additional, Burchell, Mark J., additional, Collins, Gareth S., additional, Cornwell, Luke T., additional, Daly, Luke, additional, Devillepoix, Hadrien A. R., additional, van Ginneken, Matthias, additional, Greshake, Ansgar, additional, Hallatt, Daniel, additional, Hamann, Christopher, additional, Hecht, Lutz, additional, Jenkins, Laura E., additional, Johnson, Diane, additional, Jones, Rosie, additional, King, Ashley J., additional, Mansour, Haithem, additional, McMullan, Sarah, additional, Mitchell, Jennifer T., additional, Rollinson, Gavyn, additional, Russell, Sara S., additional, Schröder, Christian, additional, Stephen, Natasha R., additional, Suttle, Martin D., additional, Tandy, Jon D., additional, Trimby, Patrick, additional, Sansom, Eleanor K., additional, Spathis, Vassilia, additional, Willcocks, Francesca M., additional, and Wozniakiewicz, Penelope J., additional

Published
2023
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41. Impact-Seismic Investigations of the InSight Mission

Author

Daubar, Ingrid, Lognonné, Philippe, Teanby, Nicholas A., Miljkovic, Katarina, Stevanović, Jennifer, Vaubaillon, Jeremie, Kenda, Balthasar, Kawamura, Taichi, Clinton, John, Lucas, Antoine, Drilleau, Melanie, Yana, Charles, Collins, Gareth S., Banfield, Don, Golombek, Matthew, Kedar, Sharon, Schmerr, Nicholas, Garcia, Raphael, Rodriguez, Sebastien, Gudkova, Tamara, May, Stephane, Banks, Maria, Maki, Justin, Sansom, Eleanor, Karakostas, Foivos, Panning, Mark, Fuji, Nobuaki, Wookey, James, van Driel, Martin, Lemmon, Mark, Ansan, Veronique, Böse, Maren, Stähler, Simon, Kanamori, Hiroo, Richardson, James, Smrekar, Suzanne, and Banerdt, W. Bruce

Published
2018
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43. Effects of Impact and Target Parameters on the Results of a Kinetic Impactor: Predictions for the Double Asteroid Redirection Test (DART) Mission

Author

Stickle, Angela M., primary, DeCoster, Mallory E., additional, Burger, Christoph, additional, Caldwell, Wendy K., additional, Graninger, Dawn, additional, Kumamoto, Kathryn M., additional, Luther, Robert, additional, Ormö, Jens, additional, Raducan, Sabina, additional, Rainey, Emma, additional, Schäfer, Christoph M., additional, Walker, James D., additional, Zhang, Yun, additional, Michel, Patrick, additional, Michael Owen, J., additional, Barnouin, Olivier, additional, Cheng, Andy F., additional, Chocron, Sidney, additional, Collins, Gareth S., additional, Davison, Thomas M., additional, Dotto, Elisabetta, additional, Ferrari, Fabio, additional, Isabel Herreros, M., additional, Ivanovski, Stavro L., additional, Jutzi, Martin, additional, Lucchetti, Alice, additional, Martellato, Elena, additional, Pajola, Maurizio, additional, Plesko, Cathy S., additional, Bruck Syal, Megan, additional, Schwartz, Stephen R., additional, Sunshine, Jessica M., additional, and Wünnemann, Kai, additional

Published
2022
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45. Sphene Emotional: How Titanite Was Shocked When the Dinosaurs Died

Author

Timms, Nicholas E, Pearce, Mark A, Erickson, Timmons M, Cavosie, Aaron J, Rae, Auriol, Wheeler, John, Wittmann, Axel, Ferrière, Ludovic, Poelchau, Michael H, Tomioka, Naotaka, Collins, Gareth S, Gulick, Sean P. S, Rasmussen, Cornelia, and Morgan, Joanna V

Subjects
Space Sciences (General)
Abstract

Accessory mineral geochronometers such as zircon, monazite, baddeleyite, and xenotime are increasingly being recognized for their ability to preserve diagnostic microstructural evidence of hypervelocity processes. However, little is known about the response of titanite to shock metamorphism, even though it is a widespread accessory phase and U-Pb geochronometer. Here we report two new mechanical twin modes in titanite within shocked granitoids from the Chicxulub impact structure, Mexico. Titanite grains in the newly acquired International Ocean Discovery Program Site expedition 364 M0077A core preserve multiple sets of polysynthetic twins, most commonly with composition planes (K1), = ~{1̅11}, and shear direction (η1) = <110>, and less commonly with the mode K1 = {130}, η1 = ~<522>. In some grains, {130} deformation bands have formed concurrently with shock twins, indicating dislocation glide with Burgers vector b = [341] can be active at shock conditions. Twinning of titanite in these modes, the presence of planar deformation features in shocked quartz, and lack of diagnostic shock microstructures in zircon in the same samples highlights the utility of titanite as a shock indicator for a shock pressure range between ~12 and ~17 GPa. Given the challenges of identifying ancient impact evidence on Earth and other bodies, microstructural analysis of titanite is here demonstrated to be a new avenue for recognizing impact deformation in materials where other impact evidence may be erased, altered, or did not manifest due to low shock pressure.

Published
2018

47. Momentum enhancement during kinetic impacts in the low-intermediate-strength regime: benchmarking & validation of impact shock physics codes

Author

Luther, Robert, Raducan, Sabina D., Burger, Christoph, Wünnemann, Kai, Jutzi, Martin, Schäfer, Christoph M., Koschny, Detlef, Davison, Thomas M., Collins, Gareth S., Zhang, Yun, Michel, Patrick, and Science and Technology Facilities Council (STFC)

Subjects
Benchmarking, Geophysics, Impact Shock Physics Codes, Space and Planetary Science, 520 Astronomy, Validation, 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften, Earth and Planetary Sciences (miscellaneous), Astronomy and Astrophysics, 500, Planetary Science, The DART and Hera Missions and the Didymos System, Pre-arrival, 620 Engineering, ddc
Abstract

In 2022 September, the DART spacecraft (NASA’s contribution to the Asteroid Impact & Deflection Assessment (AIDA) collaboration) will impact the asteroid Dimorphos, the secondary in the Didymos system. The crater formation and material ejection will affect the orbital period. In 2027, Hera (ESA’s contribution to AIDA) will investigate the system, observe the crater caused by DART, and characterize Dimorphos. Before Hera’s arrival, the target properties will not be well-constrained. The relationships between observed orbital change and specific target properties are not unique, but Hera’s observations will add additional constraints for the analysis of the impact event, which will narrow the range of feasible target properties. In this study, we use three different shock physics codes to simulate momentum transfer from impactor to target and investigate the agreement between the results from the codes for well-defined target materials. In contrast to previous studies, care is taken to use consistent crushing behavior (e.g., distension as a function of pressure) for a given porosity for all codes. First, we validate the codes against impact experiments into a regolith simulant. Second, we benchmark the codes at the DART impact scale for a range of target material parameters (10%–50% porosity, 1.4–100 kPa cohesion). Aligning the crushing behavior improves the consistency of the derived momentum enhancement between the three codes to within +/−5% for most materials used. Based on the derived mass–velocity distributions from all three codes, we derive scaling parameters that can be used for studies of the ejecta curtain.

Published
2022

48. Momentum Enhancement during Kinetic Impacts in the Low-intermediate-strength Regime: Benchmarking and Validation of Impact Shock Physics Codes

Author

Luther, Robert, primary, Raducan, Sabina D., additional, Burger, Christoph, additional, Wünnemann, Kai, additional, Jutzi, Martin, additional, Schäfer, Christoph M., additional, Koschny, Detlef, additional, Davison, Thomas M., additional, Collins, Gareth S., additional, Zhang, Yun, additional, and Michel, Patrick, additional

Published
2022
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