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2. Microporosity and parent body of the rubble-pile NEA (162173) Ryugu

Author

Neumann, Wladimir, Grott, Matthias, Trieloff, Mario, Jaumann, Ralf, Biele, Jens, Hamm, Maximilian, and Kührt, Ekkehard

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Observations of C-type NEAs and lab investigations of carbonaceous chondritic (CC) meteorites provide strong evidence for a high porosity of C-type asteroids. Boulder microporosity values derived from in-situ measurements at the surface of the rubble-pile NEA Ryugu of up to 55% are substantially higher than for water-rich CC samples and could indicate distinct evolution paths for the parent body of Ryugu and parent bodies of carbonaceous chondrites, despite spectral similarities. In the present study, we calculate the evolution of the temperature and porosity for early solar system's planetesimals in order to constrain the range of parameters that result in microporosities compatible with Ryugu's high-porosity material and likely burial depths for the boulders observed at the surface. By varying key properties of the parent body, such as accretion time t0 and radius R that have strong influence on temperature and porosity and by comparing the interior porosity distribution with the measured boulder microporosity, hydration, and partial dehydration of the material, we constrain a field within the (R,t0)-space appropriate for bodies that are likely to have produced such material. Our calculations indicate a parent body size of only a few km and its early accretion within <~2-3 Myr after the formation of Ca-Al-rich inclusions. A gradual final porosity profile of best-fit bodies indicates production of both low- and high-density boulders from the parent body material. By contrast, parent body properties for CI and CM chondrites obtained by fitting carbonate formation data indicate a radius of ~20-25 km and an accretion time of ~3.75 Myr after CAIs. These results imply a population of km-sized early accreting porous planetesimals as parent bodies of Ryugu (and, potentially, other NEAs) and a population of larger late accreting less porous parent bodies of water-rich carbonaceous chondrites.

Published
2023
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3. Characterization of the MASCOT landing area by Hayabusa2

Author

Schröder, Stefan, Sakatani, Naoya, Honda, Rie, Tatsumi, Eri, Yokota, Yasuhiro, Domingue, Deborah, Cho, Yuichiro, Kameda, Shingo, Kitazato, Kohei, Kouyama, Toru, Matsuoka, Moe, Miura, Akira, Morota, Tomokatsu, Okada, Tatsuaki, Sawada, Hirotaka, Senshu, Hiroki, Shimaki, Yuri, Sugita, Seiji, Tanaka, Satoshi, Yabuta, Hikaru, Yamada, Manabu, Grott, Matthias, Hamm, Maximilian, Ho, Tra-Mi, Jaumann, Ralf, Mottola, Stefano, Otto, Katharina, Schmitz, Nicole, and Scholten, Frank

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Context. After landing on C-type asteroid Ryugu, MASCOT imaged brightly colored, submillimeter-sized inclusions in a small rock. Hayabusa2 successfully returned a sample of small particles from the surface of Ryugu, but none of these appear to harbor such inclusions. The samples are considered representative of Ryugu. Aims. To understand the apparent discrepancy between MASCOT observations and Ryugu samples, we assess whether the MASCOT landing site, and the rock by implication, is perhaps atypical for Ryugu. Methods. We analyzed observations of the MASCOT landing area acquired by three instruments on board Hayabusa2: a camera (ONC), a near-infrared spectrometer (NIRS3), and a thermal infrared imager (TIR). We compared the landing area properties thus retrieved with those of the average Ryugu surface. Results. We selected several areas and landforms in the landing area for analysis: a small crater, a collection of smooth rocks, and the landing site itself. The crater is relatively blue and the rocks are relatively red. The spectral and thermophysical properties of the landing site are very close to those of the average Ryugu surface. The spectral properties of the MASCOT rock are probably close to average, but its thermal inertia may be somewhat higher. Conclusions. The MASCOT rock can also be considered representative of Ryugu. Some of the submillimeter-sized particles in the returned samples stand out because of their atypical spectral properties. Such particles may be present as inclusions in the MASCOT rock.

Published
2022
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4. The specific heat of astro-materials: Review of theoretical concepts, materials and techniques

Author

Biele, Jens, Grott, Matthias, Zolensky, Michael E., Benisek, Artur, and Dachs, Edgar

Subjects
Astrophysics - Earth and Planetary Astrophysics, Condensed Matter - Materials Science, Physics - Classical Physics, Physics - Geophysics
Abstract

We provide detailed background, theoretical and practical, on the specific heat cp of minerals and mixtures thereof, 'astro-materials', as well as background information on common minerals and other relevant solid substances found on the surfaces of solar system bodies. Furthermore, we demonstrate how to use specific heat and composition data for lunar samples and meteorites as well as a new database of endmember mineral heat capacities (the result of an extensive literature review) to construct reference models for the isobaric specific heat cP as a function of temperature for common solar system materials. Using a (generally linear) mixing model for the specific heat of minerals allows extrapolation of the available data to very low and very high temperatures, such that models cover the temperature range between 10 and 1000 K at least (and pressures from zero up to several kbars). We describe a procedure to estimate cp(T) for virtually any solid solar system material with a known mineral composition, e.g., model specific heat as a function of temperature for a number of typical meteorite classes with known mineralogical compositions. We present, as examples, the cp(T) curves of a number of well-described laboratory regolith analogues, as well as for planetary ices and 'tholins' in the outer solar system. Part II will review and present the heat capacity database for minerals and compounds and part III is going to cover applications, standard reference compositions, cp(T) curves and a comparison with new and literature experimental data., Comment: submitted to Special Issue for International Journal of Thermophysics 'Thermophysics of Advanced Spacecraft Materials and Extraterrestrial Samples' Part II to be submitted still in 2022

Published
2022
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5. MASCOT’s in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2

Author

Otto, Katharina, Ho, Tra-Mi, Ulamec, Stephan, Bibring, Jean-Pierre, Biele, Jens, Grott, Matthias, Hamm, Maximilian, Hercik, David, Jaumann, Ralf, Sato, Masahiko, Schröder, Stefan E., Tanaka, Satoshi, Auster, Ulrich, Kitazato, Kohei, Knollenberg, Jörg, Moussi, Aurelie, Nakamura, Tomoki, Okada, Tatsuaki, Pilorget, Cedric, Schmitz, Nicole, Sugita, Seiji, Wada, Koji, and Yabuta, Hikaru

Published
2023
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6. Science objectives of the MMX rover

Author

Ulamec, Stephan, Michel, Patrick, Grott, Matthias, Böttger, Ute, Schröder, Susanne, Hübers, Heinz-Wilhelm, Cho, Yuichiro, Rull, Fernando, Murdoch, Naomi, Vernazza, Pierre, Prieto-Ballesteros, Olga, Biele, Jens, Tardivel, Simon, Arrat, Denis, Hagelschuer, Till, Knollenberg, Jörg, Vivet, Damien, Sunday, Cecily, Jorda, Laurent, Groussin, Olivier, Robin, Colas, and Miyamoto, Hirdy

Published
2023
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7. An autonomous lunar geophysical experiment package (ALGEP) for future space missions: In response to Call for White Papers for the Voyage 2050 long-term plan in the ESA Science Program

Author

Kawamura, Taichi, Grott, Matthias, Garcia, Raphael, Wieczorek, Mark, de Raucourt, Sébastien, Lognonné, Philippe, Bernauer, Felix, Breuer, Doris, Clinton, John, Delage, Pierre, Drilleau, Mélanie, Ferraioli, Luigi, Fuji, Nobuaki, Horleston, Anna, Kletetschka, Günther, Knapmeyer, Martin, Knapmeyer-Endrun, Brigitte, Padovan, Sebastiano, Plesa, Ana-Catalina, Rivoldini, Attilio, Robertsson, Johan, Rodriguez, Sebastien, Stähler, Simon C., Stutzmann, Eleonore, Teanby, Nicholas A., Tosi, Nicola, Vrettos, Christos, Banerdt, Bruce, Fa, Wenzhe, Huang, Qian, Irving, Jessica, Ishihara, Yoshiaki, Miljković, Katarina, Mittelholz, Anna, Nagihara, Seiichi, Neal, Clive, Qu, Shaobo, Schmerr, Nicholas, and Tsuji, Takeshi

Published
2022
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9. Potential Effects of Atmospheric Collapse on Martian Heat Flow and Application to the InSight Measurements

Author

Attree, Nicholas, Patel, Narissa, Hagermann, Axel, Grott, Matthias, Spohn, Tilman, and Siegler, Matthew

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Heat flow is an important constraint on planetary formation and evolution. It has been suggested that Martian obliquity cycles might cause periodic collapses in atmospheric pressure, leading to corresponding decreases in regolith thermal conductivity (which is controlled by gas in the pore spaces). Geothermal heat would then build up in the subsurface, potentially affecting present-day heat flow - and thus the measurements made by a heat-flow probe such as the InSight HP$^{3}$ instrument. To gauge the order of magnitude of this effect, we model the diffusion of a putative heat pulse caused by thermal conductivity changes with a simple numerical scheme and compare it to the heat-flow perturbations caused by other effects. We find that an atmospheric collapse to 300 Pa in the last 40 kyr would lead to a present-day heat flow that is up to $2-8\%$ larger than the average geothermal background. Considering the InSight mission with expected $5-15\%$ error bars on the HP$^{3}$ measurement, this perturbation would only be significant in the best-case scenario of full instrument deployment, completed measurement campaign, and a well-modelled surface configuration. The prospects for detecting long-term climate perturbations via spacecraft heat-flow experiments remain challenging., Comment: 13 pages, 5 figures, accepted in PSS

Published
2019
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10. Asteroid Ryugu Before the Hayabusa2 Encounter

Author

Wada, Koji, Grott, Matthias, Michel, Patrick, Walsh, Kevin J., Barucci, Antonella M., Biele, Jens, Blum, Jürgen, Ernst, Carolyn M., Grundmann, Jan T., Gundlach, Bastian, Hagermann, Axel, Hamm, Maximilian, Jutzi, Martin, Kim, Myung-Jin, Kührt, Ekkehard, Corre, Lucille Le, Libourel, Guy, Lichtenheldt, Roy, Maturilli, Alessandro, Messenger, Scott R., Michikami, Tatsuhiro, Miyamoto, Hideaki, Mottola, Stefano, Nakamura, Akiko M., Müller, Thomas, Nittler, Larry R., Ogawa, Kazunori, Okada, Tatsuaki, Palomba, Ernesto, Sakatani, Naoya, Schröder, Stefan, Senshu, Hiroki, Takir, Driss, and Zolensky, Michael E.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA). Ground-based observations indicate that Ryugu is a C-type near-Earth asteroid with a diameter of less than 1 km, but the knowledge of its detailed properties is still very limited. This paper summarizes our best understanding of the physical and dynamical properties of Ryugu based on remote sensing and theoretical modeling. This information is used to construct a design reference model of the asteroid that is used for formulation of mission operations plans in advance of asteroid arrival. Particular attention is given to the surface properties of Ryugu that are relevant to sample acquisition. This reference model helps readers to appropriately interpret the data that will be directly obtained by Hayabusa2 and promotes scientific studies not only for Ryugu itself and other small bodies but also for the Solar System evolution that small bodies shed light on., Comment: 62 pages, 10 figures, 8 tables. Submitted to Space Science Reviews, on 6 April 2018

Published
2018

12. The MMX rover: performing in situ surface investigations on Phobos

Author

Michel, Patrick, Ulamec, Stephan, Böttger, Ute, Grott, Matthias, Murdoch, Naomi, Vernazza, Pierre, Sunday, Cecily, Zhang, Yun, Valette, Rudy, Castellani, Romain, Biele, Jens, Tardivel, Simon, Groussin, Olivier, Jorda, Laurent, Knollenberg, Jörg, Grundmann, Jan Thimo, Arrat, Denis, Pont, Gabriel, Mary, Stephane, Grebenstein, Markus, Miyamoto, Hirdy, Nakamura, Tomoki, Wada, Koji, Yoshikawa, Kent, and Kuramoto, Kiyoshi

Published
2022
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15. Cine-MRI and T1TSE Sequence for Mediastinal Mass.

Author

Grott, Matthias, Khan, Nabil, Eichhorn, Martin E., Heussel, Claus Peter, Winter, Hauke, and Eichinger, Monika

Subjects
*DIAGNOSTIC imaging, *CANCER invasiveness, *PERICARDIUM, *HEART atrium, *COMPUTED tomography, *PULMONARY artery, *MAGNETIC resonance imaging, *RETROSPECTIVE studies, *AORTA, *MEDICAL records, *ACQUISITION of data, *MYOCARDIUM, *TUMOR classification, MEDIASTINAL tumors
Abstract

Simple Summary: Contrast-enhanced computed tomography (CT) is the standard radiologic examination for evaluating mediastinal tumors. In equivocal cases, cine magnetic resonance imaging (cine-MRI) and magnetic resonance imaging (MRI)/T1-weighted spin echo sequences (T1TSE) may be additionally performed. We retrospectively analyzed patients undergoing surgical resection of mediastinal tumors (benign and malignant) with prior CT, cine-MRI, and T1TSE for (re-)evaluation and comparison to the intraoperative findings and postoperative histology reports, which were defined as a gold standard. Unclear CT cases were further investigated. A total of 47 patients were included in the study. Cine-MRI is of crucial benefit in unclear CT findings compared with T1TSE, especially when infiltration into the large central vessels and atria is suspected. Background/Objectives: Contrast-enhanced computed tomography (CT) is the standard radiologic examination for evaluating the extent of mediastinal tumors. If tumor infiltration into the large central thoracic vessels, the pericardium, or the myocardium is suspected, cine magnetic resonance imaging (cine-MRI) can provide additional valuable information. Methods: We conducted a retrospective study of patients with mediastinal tumors who were staged with CT, cine-MRI, and a T1-weighted turbo spin echo (T1TSE) prior to surgical resection. Imaging was re-evaluated regarding tumor infiltration into the pericardium, myocardium, superior vena cava, aorta, pulmonary arteries, and atria and compared with intraoperative findings and postoperative histopathological reports (gold standard). Unclear CT findings were further investigated. Results: Forty-seven patients (29 female and 18 male patients; median age: 58 years) met the inclusion criteria. Cine-MRI was able to predict infiltration of the aorta in 86%, pulmonary arteries in 85%, and atria in 80% of unclear CT cases. Aortic tumor infiltration in unclear CT cases was significantly more often correctly diagnosed with cine-MRI than with T1TSE sequence. Conclusions: Additional cine-MRI is of crucial benefit in unclear CT cases. We recommend performing cine-MRI if infiltration into the large central vessels and atria is suspected. T1TSE sequence is of very limited additional value. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Diagnostic Potential of Supplemental Static and Dynamic68Ga-FAPI-46 PET for Primary18F-FDG–Negative Pulmonary Lesions

Author

Röhrich, Manuel, primary, Daum, Johanna, additional, Gutjahr, Ewgenija, additional, Spektor, Anna-Maria, additional, Glatting, Frederik M., additional, Sahin, Yasemin Aylin, additional, Buchholz, Hans Georg, additional, Hoppner, Jorge, additional, Schroeter, Cathrin, additional, Mavriopoulou, Eleni, additional, Schlamp, Kai, additional, Grott, Matthias, additional, Eichhorn, Florian, additional, Heußel, Claus Peter, additional, Kauczor, Hans Ulrich, additional, Kreuter, Michael, additional, Giesel, Frederik, additional, Schreckenberger, Mathias, additional, Winter, Hauke, additional, and Haberkorn, Uwe, additional

Published
2024
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18. The MASCOT lander aboard Hayabusa2: The in-situ exploration of NEA (162173) Ryugu

Author

Ho, Tra-Mi, Jaumann, Ralf, Bibring, Jean-Pierre, Grott, Matthias, Glaßmeier, Karl-Heinz, Moussi, Aurelie, Krause, Christian, Auster, Ulrich, Baturkin, Volodymyr, Biele, Jens, Cordero, Federico, Cozzoni, Barbara, Dudal, Clement, Fantinati, Cinzia, Grimm, Christian, Grundmann, Jan-Thimo, Hamm, Maximilian, Herčik, David, Kayal, Kağan, Knollenberg, Jörg, Küchemann, Oliver, Ksenik, Eugen, Lange, Caroline, Lange, Michael, Lorda, Laurence, Maibaum, Michael, Mimasu, Yuya, Cenac-Morthe, Celine, Okada, Tatsuaki, Otto, Katharina, Pilorget, Cedric, Reill, Josef, Saiki, Takanao, Sasaki, Kaname, Schlotterer, Markus, Schmitz, Nicole, Schröder, Stefan, Termtanasombat, Nawarat, Toth, Nortbert, Tsuda, Yuichi, Ulamec, Stephan, Wolff, Friederike, Yoshimitsu, Tetsuo, and Ziach, Christan

Published
2021
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22. Diagnostic Potential of Supplemental Static and Dynamic 68Ga-FAPI-46 PET for Primary 18F-FDG-Negative Pulmonary Lesions.

Author

Röhrich, Manuel, Daum, Johanna, Gutjahr, Ewgenija, Spektor, Anna-Maria, Glatting, Frederik M., Sahin, Yasemin Aylin, Buchholz, Hans Georg, Hoppner, Jorge, Schroeter, Cathrin, Mavriopoulou, Eleni, Schlamp, Kai, Grott, Matthias, Eichhorn, Florian, Heußel, Claus Peter, Kauczor, Hans Ulrich, Kreuter, Michael, Giesel, Frederik, Schreckenberger, Mathias, Winter, Hauke, and Haberkorn, Uwe

Published
2024
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24. Investigating the Martian soil at the InSight landing site

Author

Delage, Pierre, primary, Caicedo, Bernardo, additional, Golombek, Matt, additional, Spohn, Tilman, additional, Schmelzbach, Cédric, additional, Brinkman, Nienke, additional, Marteau, Eloise, additional, Murdoch, Naomi, additional, Warner, Nicholas, additional, Ansan, Véronique, additional, Banerdt, Bruce, additional, Castillo-Betancourt, Juan-Pablo, additional, Edme, Pascal, additional, Gomez, Annabel, additional, Grott, Matthias, additional, Hurst, Ken, additional, Lemmon, Mark, additional, Lognonné, Philippe, additional, Piqueux, Sylvain, additional, Robertsson, Johann, additional, Sollberger, David, additional, Stähler, Simon, additional, Verdier, Nicolas, additional, Vrettos, Christos, additional, and Williams, Nathan, additional

Published
2024
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25. Mars Soil Temperature and Thermal Properties from InSight HP^3 Data

Author

Spohn, Tilman, primary, Krause, Christian, additional, Golombeck, Matthew, additional, Mueller, Nils T, additional, Grott, Matthias, additional, Knollenberg, Joerg, additional, Plesa, Ana-Catalina, additional, Breuer, Doris, additional, Morgan, Paul, additional, Bickel, Valentin T., additional, Banerdt, William Bruce, additional, and Smrekar, Suzanne E, additional

Published
2024
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26. Surface environment of Phobos and Phobos simulant UTPS

Author

Miyamoto, Hideaki, Niihara, Takafumi, Wada, Koji, Ogawa, Kazunori, Senshu, Hiroki, Michel, Patrick, Kikuchi, Hiroshi, Hemmi, Ryodo, Nakamura, Tomoki, Nakamura, Akiko M., Hirata, Naoyuki, Sasaki, Sho, Asphaug, Erik, Britt, Daniel T., Abell, Paul A., Ballouz, Ronald-Louis, Banouin, Olivier S., Baresi, Nicola, Barucci, Maria A., Biele, Jens, Grott, Matthias, Hino, Hideitsu, Hong, Peng K., Imada, Takane, Kameda, Shingo, Kobayashi, Makito, Libourel, Guy, Mogi, Katsuro, Murdoch, Naomi, Nishio, Yuki, Okamoto, Shogo, Ota, Yuichiro, Otsuki, Masatsugu, Otto, Katharina A., Sakatani, Naoya, Shimizu, Yuta, Takemura, Tomohiro, Terada, Naoki, Tsukamoto, Masafumi, Usui, Tomohiro, and Willner, Konrad

Published
2021
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27. 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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28. Highly porous nature of a primitive asteroid revealed by thermal imaging

Author

Okada, Tatsuaki, Fukuhara, Tetsuya, Tanaka, Satoshi, Taguchi, Makoto, Arai, Takehiko, Senshu, Hiroki, Sakatani, Naoya, Shimaki, Yuri, Demura, Hirohide, Ogawa, Yoshiko, Suko, Kentaro, Sekiguchi, Tomohiko, Kouyama, Toru, Takita, Jun, Matsunaga, Tsuneo, Imamura, Takeshi, Wada, Takehiko, Hasegawa, Sunao, Helbert, Jörn, Müller, Thomas G., Hagermann, Axel, Biele, Jens, Grott, Matthias, Hamm, Maximilian, Delbo, Marco, Hirata, Naru, Hirata, Naoyuki, Yamamoto, Yukio, Sugita, Seiji, Namiki, Noriyuki, Kitazato, Kohei, Arakawa, Masahiko, Tachibana, Shogo, Ikeda, Hitoshi, Ishiguro, Masateru, Wada, Koji, Honda, Chikatoshi, Honda, Rie, Ishihara, Yoshiaki, Matsumoto, Koji, Matsuoka, Moe, Michikami, Tatsuhiro, Miura, Akira, Morota, Tomokatsu, Noda, Hirotomo, Noguchi, Rina, Ogawa, Kazunori, Shirai, Kei, Tatsumi, Eri, Yabuta, Hikaru, Yokota, Yasuhiro, Yamada, Manabu, Abe, Masanao, Hayakawa, Masahiko, Iwata, Takahiro, Ozaki, Masanobu, Yano, Hajime, Hosoda, Satoshi, Mori, Osamu, Sawada, Hirotaka, Shimada, Takanobu, Takeuchi, Hiroshi, Tsukizaki, Ryudo, Fujii, Atsushi, Hirose, Chikako, Kikuchi, Shota, Mimasu, Yuya, Ogawa, Naoko, Ono, Go, Takahashi, Tadateru, Takei, Yuto, Yamaguchi, Tomohiro, Yoshikawa, Kent, Terui, Fuyuto, Saiki, Takanao, Nakazawa, Satoru, Yoshikawa, Makoto, Watanabe, Seiichiro, and Tsuda, Yuichi

Published
2020
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29. Mars’ Crustal Magnetic Field

Author

Morschhauser, Achim, Vervelidou, Foteini, Thomas, Paul, Grott, Matthias, Lesur, Vincent, Gilder, Stuart A., Bertola, F., Editorial Board Member, Cesarsky, C. J., Editorial Board Member, Ehrenfreund, P., Editorial Board Member, Engvold, O., Editorial Board Member, van den Heuvel, E. P. J., Editorial Board Member, Kaspi, V. M., Editorial Board Member, Kuijpers, J. M. E., Editorial Board Member, van der Laan, H., Editorial Board Member, Murdin, P. G., Editorial Board Member, Somov, B. V., Editorial Board Member, Sunyaev, R. A., Editorial Board Member, Lühr, Hermann, editor, Wicht, Johannes, editor, Gilder, Stuart A., editor, and Holschneider, Matthias, editor

Published
2018
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33. Mercury’s Global Evolution

Author

Hauck, Steven A., primary, Grott, Matthias, additional, Byrne, Paul K., additional, Denevi, Brett W., additional, Stanley, Sabine, additional, and McCoy, Timothy J., additional

Published
2018
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34. Characterization of the InSight Landing Site Near Surface Properties Using the Heat Flow and Physical Properties Probe (HP³) Mole as a Seismic Source

Author

Kedar, Sharon, Banerdt, William Bruce, Brinkman, Nienke, Charalambous, Constantinos, Delage, Pierre, Fayon, Lucile, Gaudin, Emilien, Giardini, Domenico, Grott, Matthias, Horleston, Anna C, Hudson, Troy, Hurst, Kenneth J, Kiely, Aaron B, Kerjean, Laurent, Knapmeyer-Endrun, Brigitte, Krasner, Sanford M, Krause, Christian, Lognonné, Philippe Henri, McClean, John, Nonon, Michel, Pike, William T, Robertsson, Johan O A, Schmelzbach, Cedric, Schmerr, Nicholas C, Stott, Alexander, Spohn, Tilman, Sollberger, David, Staehler, Simon C, Teanby, Nicholas A, Vallade, Julien, van Driel, Martin, Verdier, Nicolas, Vrettos, Christos, Warren, Tristram, Widmer-Schnidrig, Rudolf, and Yana, Charles

Published
2019

35. Characterization of the InSight Landing Site Near Surface Properties Using the Heat Flow and Physical Properties Probe (HP³) Mole as a Seismic Source

Author

Yana, Charles, Widmer-Schnidrig, Rudolf, Warren, Tristram, Vrettos, Christos, Verdier, Nicolas, van Driel, Martin, Vallade, Julien, Teanby, Nicholas A, Staehler, Simon C, Sollberger, David, Spohn, Tilman, Stott, Alexander, Schmerr, Nicholas C, Schmelzbach, Cedric, Robertsson, Johan O A, Pike, William T, Nonon, Michel, McClean, John, Lognonné, Philippe Henri, Krause, Christian, Krasner, Sanford M, Knapmeyer-Endrun, Brigitte, Kerjean, Laurent, Kiely, Aaron B, Hurst, Kenneth J, Hudson, Troy, Horleston, Anna C, Grott, Matthias, Giardini, Domenico, Gaudin, Emilien, Fayon, Lucile, Delage, Pierre, Charalambous, Constantinos, Brinkman, Nienke, Banerdt, William Bruce, and Kedar, Sharon

Abstract

UNKNOWN

Published
2019

36. Mars’ Crustal Magnetic Field

Author

Morschhauser, Achim, primary, Vervelidou, Foteini, additional, Thomas, Paul, additional, Grott, Matthias, additional, Lesur, Vincent, additional, and Gilder, Stuart A., additional

Published
2018
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38. Macromolecular organic matter in samples of the asteroid (162173) Ryugu

Author

Yabuta, Hikaru, primary, Cody, George D., additional, Engrand, Cécile, additional, Kebukawa, Yoko, additional, De Gregorio, Bradley, additional, Bonal, Lydie, additional, Remusat, Laurent, additional, Stroud, Rhonda, additional, Quirico, Eric, additional, Nittler, Larry, additional, Hashiguchi, Minako, additional, Komatsu, Mutsumi, additional, Okumura, Taiga, additional, Mathurin, Jérémie, additional, Dartois, Emmanuel, additional, Duprat, Jean, additional, Takahashi, Yoshio, additional, Takeichi, Yasuo, additional, Kilcoyne, David, additional, Yamashita, Shohei, additional, Dazzi, Alexandre, additional, Deniset-Besseau, Ariane, additional, Sandford, Scott, additional, Martins, Zita, additional, Tamenori, Yusuke, additional, Ohigashi, Takuji, additional, Suga, Hiroki, additional, Wakabayashi, Daisuke, additional, Verdier-Paoletti, Maximilien, additional, Mostefaoui, Smail, additional, Montagnac, Gilles, additional, Barosch, Jens, additional, Kamide, Kanami, additional, Shigenaka, Miho, additional, Bejach, Laure, additional, Matsumoto, Megumi, additional, Enokido, Yuma, additional, Noguchi, Takaaki, additional, Yurimoto, Hisayoshi, additional, Nakamura, Tomoki, additional, Okazaki, Ryuji, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Connolly, Harold C., additional, Lauretta, Dante S., additional, Abe, Masanao, additional, Okada, Tatsuaki, additional, Yada, Toru, additional, Nishimura, Masahiro, additional, Yogata, Kasumi, additional, Nakato, Aiko, additional, Yoshitake, Miwa, additional, Iwamae, Ayako, additional, Furuya, Shizuho, additional, Hatakeda, Kentaro, additional, Miyazaki, Akiko, additional, Soejima, Hiromichi, additional, Hitomi, Yuya, additional, Kumagai, Kazuya, additional, Usui, Tomohiro, additional, Hayashi, Tasuku, additional, Yamamoto, Daiki, additional, Fukai, Ryota, additional, Sugita, Seiji, additional, Kitazato, Kohei, additional, Hirata, Naru, additional, Honda, Rie, additional, Morota, Tomokatsu, additional, Tatsumi, Eri, additional, Sakatani, Naoya, additional, Namiki, Noriyuki, additional, Matsumoto, Koji, additional, Noguchi, Rina, additional, Wada, Koji, additional, Senshu, Hiroki, additional, Ogawa, Kazunori, additional, Yokota, Yasuhiro, additional, Ishihara, Yoshiaki, additional, Shimaki, Yuri, additional, Yamada, Manabu, additional, Honda, Chikatoshi, additional, Michikami, Tatsuhiro, additional, Matsuoka, Moe, additional, Hirata, Naoyuki, additional, Arakawa, Masahiko, additional, Okamoto, Chisato, additional, Ishiguro, Masateru, additional, Jaumann, Ralf, additional, Bibring, Jean-Pierre, additional, Grott, Matthias, additional, Schröder, Stefan, additional, Otto, Katharina, additional, Pilorget, Cedric, additional, Schmitz, Nicole, additional, Biele, Jens, additional, Ho, Tra-Mi, additional, Moussi-Soffys, Aurélie, additional, Miura, Akira, additional, Noda, Hirotomo, additional, Yamada, Tetsuya, additional, Yoshihara, Keisuke, additional, Kawahara, Kosuke, additional, Ikeda, Hitoshi, additional, Yamamoto, Yukio, additional, Shirai, Kei, additional, Kikuchi, Shota, additional, Ogawa, Naoko, additional, Takeuchi, Hiroshi, additional, Ono, Go, additional, Mimasu, Yuya, additional, Yoshikawa, Kent, additional, Takei, Yuto, additional, Fujii, Atsushi, additional, Iijima, Yu-ichi, additional, Nakazawa, Satoru, additional, Hosoda, Satoshi, additional, Iwata, Takahiro, additional, Hayakawa, Masahiko, additional, Sawada, Hirotaka, additional, Yano, Hajime, additional, Tsukizaki, Ryudo, additional, Ozaki, Masanobu, additional, Terui, Fuyuto, additional, Tanaka, Satoshi, additional, Fujimoto, Masaki, additional, Yoshikawa, Makoto, additional, Saiki, Takanao, additional, Tachibana, Shogo, additional, Watanabe, Sei-ichiro, additional, and Tsuda, Yuichi, additional

Published
2023
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39. Seasonal Variations of Soil Thermal Conductivity at the InSight Landing Site

Author

Grott, Matthias, primary, Piqueux, Sylvain, additional, Spohn, Tilman, additional, Knollenberg, Joerg, additional, Krause, Christian, additional, Marteau, Eloise, additional, Hudson, Troy L., additional, Forget, Francois, additional, Lange, Lucas, additional, Müller, N., additional, Golombek, Matthew P., additional, Nagihara, Seiichi, additional, Morgan, Paul, additional, Murphy, J.P., additional, Siegler, Matthew Adam, additional, King, Scott D., additional, Banfield, Donald, additional, Smrekar, Suzanne E, additional, and Banerdt, William Bruce, additional

Published
2023
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40. Pre-mission InSights on the Interior of Mars

Author

Smrekar, Suzanne E., Lognonné, Philippe, Spohn, Tilman, Banerdt, W. Bruce, Breuer, Doris, Christensen, Ulrich, Dehant, Véronique, Drilleau, Mélanie, Folkner, William, Fuji, Nobuaki, Garcia, Raphael F., Giardini, Domenico, Golombek, Matthew, Grott, Matthias, Gudkova, Tamara, Johnson, Catherine, Khan, Amir, Langlais, Benoit, Mittelholz, Anna, Mocquet, Antoine, Myhill, Robert, Panning, Mark, Perrin, Clément, Pike, Tom, Plesa, Ana-Catalina, Rivoldini, Attilio, Samuel, Henri, Stähler, Simon C., van Driel, Martin, Van Hoolst, Tim, Verhoeven, Olivier, Weber, Renee, and Wieczorek, Mark

Published
2018
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41. MASCOT’s in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2

Author

Otto, Katharina A., Ho, Tra-Mi, Ulamec, Stephan, Bibring, Jean-Pierre, Biele, Jens, Grott, Matthias, Hamm, Maximilian, Hercik, David, Jaumann, Ralf, Sato, M., Schröder, Stefan, Tanaka, Satoshi, Auster, U., Kitazato, Kohei, Knollenberg, Jörg, Moussi, Aurelie, Nakamura, Tomoki, Okada, Tatsuaki, Pilorget, Cedric, Schmitz, Nicole, Sugita, S., Wada, Koji, and Yabuta, Hikaru

Subjects
In situ analyses, MASCOT, 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften, Geology, Asteroid sample return, Multi-scale analysis, Astronomi, astrofysik och kosmologi, Space and Planetary Science, Asteroid regolith, MASCOT in situ analysis asteroid Ryugu regolith samples remote sensing Hayabusa2, Astronomy, Astrophysics and Cosmology, Multi‑scale analysis, Asteroid Ryugu, Asteroid regolith properties, Hayabusa2
Abstract

The Hayabusa2 mission provided a unique data set of asteroid Ryugu that covers a wide range of spatial scale from the orbiter remote sensing instruments to the returned samples. The MASCOT lander that was delivered onto the surface of Ryugu aimed to provide context for these data sets by producing in situ data collected by a camera (MasCam), a radiometer (MARA), a magnetometer (MasMag) and a spectrometer (MicrOmega). In this work, we evaluate the success of MASCOT as an integrated lander to bridge the gap between orbiter and returned sample analysis. We find that MASCOT’s measurements and derivatives thereof, including the rock morphology, colour in the visible wavelengths, possible meteorite analogue, density, and porosity of the rock at the landing site are in good agreement with those of the orbiter and the returned samples. However, it also provides information on the spatial scale (sub-millimetres to centimetres) at which some physical properties such as the thermal inertia and reflectance undergo scale-dependent changes. Some of the in situ observations such as the presence of clast/inclusions in rocks and the absence of fine particles at the landing site was uniquely identified by MASCOT. Thus, we conclude that the delivery of an in situ instrument like MASCOT provides a valuable data set that complements and provides context for remote sensing and returned sample analyses. Validerad;2023;Nivå 2;2023-04-14 (johcin);Funder: German Aerospace Center (DLR); French space agency (CNES);Part of special issue: New Insights in Planetary Science with Hayabusa, Hayabusa2, and Future Space Missions

Published
2023

43. A Cerberus Fossae Seismic Network

Author

Stähler, S., Panning, M., Antonangeli, D., Banerdt, B., Banfield, D., Banks, M., Ceylan, S., Charalambous, C., Clinton, John, Daubar, I., Fernando, B., Giardini, D., Grott, Matthias, Horleston, A., Hurst, K., Kawamura, T., Khan, A., Kim, D., Knapmeyer, Martin, Knapmeyer-Endrun, B., Lorenz, R. D., Margerin, L., Marusiak, A, Menina, S., Mittelholz, A., Murdoch, N., Nishikawa, Yasuhiro, Nunn, C., Perrin, C., Pike, W.T., Schmelzbach, C., Schmerr, N., Schimmel, M., Spiga, A., Stott, A., Taylor, Jake, and Weber, R.

Subjects
Mars Seismology Missions
Published
2023

46. MASCOT—The Mobile Asteroid Surface Scout Onboard the Hayabusa2 Mission

Author

Ho, Tra-Mi, Baturkin, Volodymyr, Grimm, Christian, Grundmann, Jan Thimo, Hobbie, Catherin, Ksenik, Eugen, Lange, Caroline, Sasaki, Kaname, Schlotterer, Markus, Talapina, Maria, Termtanasombat, Nawarat, Wejmo, Elisabet, Witte, Lars, Wrasmann, Michael, Wübbels, Guido, Rößler, Johannes, Ziach, Christian, Findlay, Ross, Biele, Jens, Krause, Christian, Ulamec, Stephan, Lange, Michael, Mierheim, Olaf, Lichtenheldt, Roy, Maier, Maximilian, Reill, Josef, Sedlmayr, Hans-Jürgen, Bousquet, Pierre, Bellion, Anthony, Bompis, Olivier, Cenac-Morthe, Celine, Deleuze, Muriel, Fredon, Stephane, Jurado, Eric, Canalias, Elisabet, Jaumann, Ralf, Bibring, Jean-Pierre, Glassmeier, Karl Heinz, Hercik, David, Grott, Matthias, Celotti, Luca, Cordero, Federico, Hendrikse, Jeffrey, and Okada, Tatsuaki

Published
2017
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48. The InSight HP³ Penetrator (Mole) on Mars: Soil Properties Derived from the Penetration Attempts and Related Activities

Author

Spohn, Tilman, Hudson, Troy L., Marteau, Eloïse, Golombek, Matthew, Grott, Matthias, Wippermann, Torben, Ali, Khaled S., Schmelzbach, Cédric, Kedar, Sharon, Hurst, Ken, Trebi-Ollennu, Ashitey, Ansan, Véronique, Garvin, James, Knollenberg, Jörg, Müller, N., Piqueux, Sylvain, Lichtenheldt, Roy, Krause, Christian, Fantinati, Cinzia, Brinkman, Nienke, Sollberger, David, Delage, Pierre, Vrettos, Christos, Reershemius, Siebo, Wisniewski, Lukasz, Grygorczuk, Jurek, Robertsson, Johan, Edme, Pascal, Andersson, Fredrik, Krömer, O., Lognonné, Philippe, Giardini, Domenico, Smrekar, Suz̀anne E., and Banerdt, William B.

Subjects
Record of operating a penetrator on Mars, Homestead Hollow near surface structure, Martian soil mechanical and thermal properties
Abstract

The NASA InSight Lander on Mars includes the Heat Flow and Physical Properties Package HP3 to measure the surface heat flow of the planet. The package uses temperature sensors that would have been brought to the target depth of 3–5 m by a small penetrator, nicknamed the mole. The mole requiring friction on its hull to balance remaining recoil from its hammer mechanism did not penetrate to the targeted depth. Instead, by precessing about a point midway along its hull, it carved a 7 cm deep and 5–6 cm wide pit and reached a depth of initially 31 cm. The root cause of the failure – as was determined through an extensive, almost two years long campaign – was a lack of friction in an unexpectedly thick cohesive duricrust. During the campaign – described in detail in this paper – the mole penetrated further aided by friction applied using the scoop at the end of the robotic Instrument Deployment Arm and by direct support by the latter. The mole tip finally reached a depth of about 37 cm, bringing the mole back-end 1–2 cm below the surface. It reversed its downward motion twice during attempts to provide friction through pressure on the regolith instead of directly with the scoop to the mole hull. The penetration record of the mole was used to infer mechanical soil parameters such as the penetration resistance of the duricrust of 0.3–0.7 MPa and a penetration resistance of a deeper layer (> 30 cm depth) of 4.9±0.4 MPa. Using the mole’s thermal sensors, thermal conductivity and diffusivity were measured. Applying cone penetration theory, the resistance of the duricrust was used to estimate a cohesion of the latter of 2–15 kPa depending on the internal friction angle of the duricrust. Pushing the scoop with its blade into the surface and chopping off a piece of duricrust provided another estimate of the cohesion of 5.8 kPa. The hammerings of the mole were recorded by the seismometer SEIS and the signals were used to derive P-wave and S-wave velocities representative of the topmost tens of cm of the regolith. Together with the density provided by a thermal conductivity and diffusivity measurement using the mole’s thermal sensors, the elastic moduli were calculated from the seismic velocities. Using empirical correlations from terrestrial soil studies between the shear modulus and cohesion, the previous cohesion estimates were found to be consistent with the elastic moduli. The combined data were used to derive a model of the regolith that has an about 20 cm thick duricrust underneath a 1 cm thick unconsolidated layer of sand mixed with dust and above another 10 cm of unconsolidated sand. Underneath the latter, a layer more resistant to penetration and possibly containing debris from a small impact crater is inferred. The thermal conductivity increases from 14 mW/m K to 34 mW/m K through the 1 cm sand/dust layer, keeps the latter value in the duricrust and the sand layer underneath and then increases to 64 mW/m K in the sand/gravel layer below., Space Science Reviews, 218 (8), ISSN:1572-9672, ISSN:0038-6308

Published
2022

49. Science Objectives of the MMX Rover

Author

Ulamec, Stephan, Michel, Patrick, Grott, Matthias, Böttger, Ute, Schröder, Susanne, Hübers, Heinz-Wilhelm, Cho, Yuichiro, Rull, Fernando, Murdoch, Naomi, Vernazza, Pierre, Biele, Jens, Tardivel, Simon, and Miyamoto, Hideaki

Subjects
Phobos, Mars Moon eXploration MMX, Rover
Published
2022

50. Characterization of the MASCOT landing area by Hayabusa2

Author

Schröder, Stefan, primary, Sakatani, Naoya, additional, Honda, Rie, additional, Tatsumi, Eri, additional, Yokota, Yasuhiro, additional, Domingue, Deborah, additional, Cho, Yuichiro, additional, Kameda, Shingo, additional, Kitazato, Kohei, additional, Kouyama, Toru, additional, Matsuoka, Moe, additional, Miura, Akira, additional, Morota, Tomokatsu, additional, Okada, Tatsuaki, additional, Sawada, Hirotaka, additional, Senshu, Hiroki, additional, Shimaki, Yuri, additional, Sugita, Seiji, additional, Tanaka, Satoshi, additional, Yabuta, Hikaru, additional, Yamada, Manabu, additional, Grott, Matthias, additional, Hamm, Maximilian, additional, Ho, Tra-Mi, additional, Jaumann, Ralf, additional, Mottola, Stefano, additional, Otto, Katharina, additional, Schmitz, Nicole, additional, and Scholten, Frank, additional

Published
2022
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