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130 results on '"Güttler, Carsten"'

1. AMBITION – comet nucleus cryogenic sample return

Author: Bockelée-Morvan, D., Filacchione, Gianrico, Altwegg, Kathrin, Bianchi, Eleonora, Bizzarro, Martin, Blum, Jürgen, Bonal, Lydie, Capaccioni, Fabrizio, Choukroun, Mathieu, Codella, Claudio, Cottin, Hervé, Davidsson, Björn, De Sanctis, Maria Cristina, Drozdovskaya, Maria N., Engrand, Cécile, Galand, Marina, Güttler, Carsten, Henri, Pierre, Herique, Alain, Ivanovski, Stavro, Kokotanekova, Rosita, Levasseur-Regourd, Anny-Chantal, Miller, Kelly E., Rotundi, Alessandra, Schönbächler, Maria, Snodgrass, Colin, Thomas, Nicolas, Tubiana, Cecilia, Ulamec, Stephan, and Vincent, Jean-Baptiste
Published: 2022
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2. Models of Rosetta/OSIRIS 67P dust coma phase function

Author: Moreno, Fernando, Guirado, Daniel, Muñoz, Olga, Bertini, Ivano, Tubiana, Cecilia, Guttler, Carsten, Fulle, Marco, Rotundi, Alessandra, Della Corte, Vincenzo, Ivanovski, Stavro, Rinaldi, Giovanna, Bockelee-Morvan, Dominique, Zakharov, Vladimir, Agarwal, Jessica, Mottola, Stefano, Toth, Imre, Frattin, Elisa, Lara, Luisa, Gutierrez, Pedro, Lin, Zhong Yi, Kolokolova, Ludmilla, Sierks, Holger, Naletto, Giampiero, Lamy, Philippe, Rodrigo, Rafael, Koschny, Detlef, Davidsson, Bjorn, Barucci, Maria Antonietta, Bertaux, Jean-Lup, Bodewits, Dennis, Cremonese, Gabriele, Da Deppo, Vania, Debei, Stefano, de Cecco, Mariolino, Deller, Jakob, Fornasier, Sonia, Ip, Wing, Keller, Uwe, Lazzarin, Monica, Lopez-Moreno, Jose Juan, Marzari, Francesco, and Shi, Xian
Subjects: Astrophysics - Earth and Planetary Astrophysics
Abstract: The phase function of the dust coma of comet 67P has been determined from Rosetta/OSIRIS images \citep{Bertini17}. This function show a deep minimum at phase angles near 100$^\circ$, and a strong backscattering enhancement. These two properties cannot be reproduced by regular models of cometary dust, most of them based on wavelength-sized and randomly-oriented aggregate particles. We show, however, that an ensamble of oriented elongated particles of a wide variety of aspect ratios, with radii $r \gtrsim$10 $\mu$m, and whose long axes are perpendicular to the direction of the solar radiation, are capable of reproducing the observed phase function. These particles must be absorbing, with an imaginary part of the refractive index of about 0.1 to match the expected geometric albedo, and with porosity in the 60-70\% range., Comment: Accepted by Astronomical Journal, September 26th, 2018. 21 pages, 5 figures
Published: 2018
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3. Grain poly-dispersity and non-sphericity effects on gas flow through granular beds using measurements and modelling

Author: Zivithal, Stephan, primary, Kargl, Günter, additional, Macher, Wolfgang, additional, Laddha, Sunny, additional, Blum, Jürgen, additional, Gundlach, Bastian, additional, Güttler, Carsten, additional, and Sierks, Holger, additional
Published: 2024
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4. Diurnal ejection of boulder clusters on comet 67P lasting beyond 3 AU

Author: Shi, Xian, Hu, Xuanyu, Agarwal, Jessica, Güttler, Carsten, Rose, Martin, Keller, Horst Uwe, Fulle, Marco, Deller, Jakob, Sierks, Holger, Shi, Xian, Hu, Xuanyu, Agarwal, Jessica, Güttler, Carsten, Rose, Martin, Keller, Horst Uwe, Fulle, Marco, Deller, Jakob, and Sierks, Holger
Abstract: Ejection of large boulder-like debris is a vigorous form of cometary activity that is unlikely induced by water ice out-gassing alone but rather associated with the sublimation of super-volatile ices. Though perceived on several comets, actual pattern and mechanism of such activity are still unclear. Here we report on a specialized observation of ejections of decimeter- to meter-sized boulders on comet 67P/Churyumov-Gerasimenko outbound between 2.5 and 3.3 AU from the Sun. With a common source region, these events recurred in local morning. The boulders of elongated shapes were ejected in clusters at low inclinations comparable to the solar elevation below 40 degrees at the time. We show that these chunks could be propelled by the surrounding, asymmetric gas field that produced a distinct lateral acceleration. Possibly both water and carbon dioxide have contributed to their mobilization, while the season and local topography are among deciding factors. The mechanisms for sustaining regular activity of comets at large heliocentric distances are likely more diverse and intricate than previously thought.
Published: 2024
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5. Grain polydispersity and non-sphericity effects on gas flow through granular beds using measurements and modelling.

Author: Zivithal, Stephan, Kargl, Günter, Macher, Wolfgang, Laddha, Sunny, Blum, Jürgen, Gundlach, Bastian, Güttler, Carsten, and Sierks, Holger
Subjects: GRANULAR flow, MATERIAL erosion, PARTICLE size distribution, PRESSURE drop (Fluid dynamics), POROUS materials, DIFFUSION coefficients, GAS flow
Abstract: The quality of cometary surface activity simulations and erosion models of icy moons depends on a good knowledge of the surface layer permeability to gas flow. Therefore, we study various models of the Knudsen diffusion coefficient and the viscous permeability, which are used to describe the flow of rarefied gases through porous materials. Usually, these models are expressed for monodisperse packed beds. In this work, we describe a generalization to polydisperse packed beds and compare them with experimental results. In addition, we analyse non-spherical packings to test how well the recently developed models are applicable. For this purpose, the gas flow parameters of these samples are measured in a dedicated measurement set-up. Special attention had to be paid to biases in measuring the porosity and the pressure drop in the sample, which are discussed in detail. Our measurements confirm that the Knudsen diffusion coefficient is inversely proportional to the specific surface area of the grains and that the viscous permeability is inversely proportional to the specific surface area squared. Further, we were able to identify a relation between the gas flow parameters, represented by a parameter β, which seems to be an indicator of the mean orientation of the grains. The findings give further evidence of the importance of the grain size distribution and the grain shape for rarefied gas flow. In particular, the results show that the standard polydisperse model is not sufficient when a considerable part of the pore space consists of traps or other rarely percolated parts. [ABSTRACT FROM AUTHOR]
Published: 2024
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6. Diurnal Ejection of Boulder Clusters on Comet 67P Lasting beyond 3 au

Author: Shi, Xian, primary, Hu, Xuanyu, additional, Agarwal, Jessica, additional, Güttler, Carsten, additional, Rose, Martin, additional, Keller, Horst Uwe, additional, Fulle, Marco, additional, Deller, Jakob, additional, and Sierks, Holger, additional
Published: 2024
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7. Simulation and experiment of gas diffusion in a granular bed

Author: Güttler, Carsten, Rose, Martin, Sierks, Holger, Macher, Wolfgang, Zivithal, Stephan, Blum, Jürgen, Laddha, Sunny, Gundlach, Bastian, Kargl, Günter, Güttler, Carsten, Rose, Martin, Sierks, Holger, Macher, Wolfgang, Zivithal, Stephan, Blum, Jürgen, Laddha, Sunny, Gundlach, Bastian, and Kargl, Günter
Abstract: The diffusion of gas through porous material is important to understand the physical processes underlying cometary activity. We study the diffusion of a rarefied gas (Knudsen regime) through a packed bed of monodisperse spheres via experiments and numerical modelling, providing an absolute value of the diffusion coefficient and compare it to published analytical models. The experiments are designed to be directly comparable to numerical simulations, by using precision steel beads, simple geometries, and a trade-off of the sample size between small boundary effects and efficient computation. For direct comparison, the diffusion coefficient is determined in Direct Simulation Monte Carlo (DSMC) simulations, yielding a good match with experiments. This model is further-on used on a microscopic scale, which cannot be studied in experiments, to determine the mean path of gas molecules and its distribution, and compare it against an analytical model. Scaling with sample properties (particle size, porosity) and gas properties (molecular mass, temperature) is consistent with analytical models. As predicted by these, results are very sensitive on sample porosity and we find that a tortuosity $q(\varepsilon)$ depending linearly on the porosity $\varepsilon$ can well reconcile the analytical model with experiments and simulations. Mean paths of molecules are close to those described in the literature, but their distribution deviates from the expectation for small path lengths. The provided diffusion coefficients and scaling laws are directly applicable to thermophysical models of idealised cometary material., Comment: accepted by MNRAS
Published: 2023
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8. AMBITION – comet nucleus cryogenic sample return

Author: Bockelée-Morvan, D., Filacchione, Gianrico, Altwegg, Kathrin, Bianchi, Eleonora, Bizzarro, Martin, Blum, Jürgen, Bonal, Lydie, Capaccioni, Fabrizio, Choukroun, Mathieu, Codella, Claudio, Cottin, Hervé, Davidsson, Björn, De Sanctis, Maria Cristina, Drozdovskaya, Maria N., Engrand, Cécile, Galand, Marina, Güttler, Carsten, Henri, Pierre, Herique, Alain, Ivanovski, Stavro, Kokotanekova, Rosita, Levasseur-Regourd, Anny-Chantal, Miller, Kelly E., Rotundi, Alessandra, Schönbächler, Maria, Snodgrass, Colin, Thomas, Nicolas, Tubiana, Cecilia, Ulamec, Stephan, Vincent, Jean-Baptiste, Bockelée-Morvan, D., Filacchione, Gianrico, Altwegg, Kathrin, Bianchi, Eleonora, Bizzarro, Martin, Blum, Jürgen, Bonal, Lydie, Capaccioni, Fabrizio, Choukroun, Mathieu, Codella, Claudio, Cottin, Hervé, Davidsson, Björn, De Sanctis, Maria Cristina, Drozdovskaya, Maria N., Engrand, Cécile, Galand, Marina, Güttler, Carsten, Henri, Pierre, Herique, Alain, Ivanovski, Stavro, Kokotanekova, Rosita, Levasseur-Regourd, Anny-Chantal, Miller, Kelly E., Rotundi, Alessandra, Schönbächler, Maria, Snodgrass, Colin, Thomas, Nicolas, Tubiana, Cecilia, Ulamec, Stephan, and Vincent, Jean-Baptiste
Abstract: We describe the AMBITION project, a mission to return the first-ever cryogenically-stored sample of a cometary nucleus, that has been proposed for the ESA Science Programme Voyage 2050. Comets are the leftover building blocks of giant planet cores and other planetary bodies, and fingerprints of Solar System’s formation processes. We summarise some of the most important questions still open in cometary science and Solar System formation after the successful Rosetta mission. We show that many of these scientific questions require sample analysis using techniques that are only possible in laboratories on Earth. We summarize measurements, instrumentation and mission scenarios that can address these questions. We emphasize the need for returning a sample collected at depth or, still more challenging, at cryogenic temperatures while preserving the stratigraphy of the comet nucleus surface layers. We provide requirements for the next generation of landers, for cryogenic sample acquisition and storage during the return to Earth. Rendezvous missions to the main belt comets and Centaurs, expanding our knowledge by exploring new classes of comets, are also discussed. The AMBITION project is discussed in the international context of comet and asteroid space exploration.
Published: 2023

9. Validation of gas flow experiments for porous media by means of computer simulations

Author: Laddha, Sunny, primary, Macher, Wolfgang, additional, Kargl, Günter, additional, Zivithal, Stephan, additional, Blum, Jürgen, additional, Gundlach, Bastian, additional, Güttler, Carsten, additional, Sierks, Holger, additional, and Rose, Martin, additional
Published: 2023
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10. The MASCOT Magnetometer

Author: Herčík, David, Auster, Hans-Ulrich, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Güttler, Carsten, Hillenmaier, Olaf, Hördt, Andreas, Liebert, Evelyn, Matsuoka, Ayako, Nomura, Reiko, Richter, Ingo, Stoll, Bernd, Weiss, Benjamin P., and Glassmeier, Karl-Heinz
Published: 2017
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11. CO2-driven surface changes in the Hapi region on Comet 67P/Churyumov–Gerasimenko

Author: Davidsson, Björn J R, primary, Schloerb, F Peter, additional, Fornasier, Sonia, additional, Oklay, Nilda, additional, Gutiérrez, Pedro J, additional, Buratti, Bonnie J, additional, Chmielewski, Artur B, additional, Gulkis, Samuel, additional, Hofstadter, Mark D, additional, Keller, H Uwe, additional, Sierks, Holger, additional, Güttler, Carsten, additional, Küppers, Michael, additional, Rickman, Hans, additional, Choukroun, Mathieu, additional, Lee, Seungwon, additional, Lellouch, Emmanuel, additional, Lethuillier, Anthony, additional, Da Deppo, Vania, additional, Groussin, Olivier, additional, Kührt, Ekkehard, additional, Thomas, Nicolas, additional, Tubiana, Cecilia, additional, El-Maarry, M Ramy, additional, La Forgia, Fiorangela, additional, Mottola, Stefano, additional, and Pajola, Maurizio, additional
Published: 2022
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12. CO2-driven surface changes in the Hapi region on Comet 67P/Churyumov-Gerasimenko

Author: Davidsson, Björn J. R., Schloerb, F. Peter, Fornasier, Sonia, Oklay, Nilda, Gutiérrez, Pedro J., Buratti, Bonnie J., Chmielewski, Artur B., Gulkis, Samuel, Hofstadter, Mark D., Keller, H. Uwe, Sierks, Holger, Güttler, Carsten, Küppers, Michael, Rickman, Hans, Choukroun, Mathieu, Lee, Seungwon, Lellouch, Emmanuel, Lethuillier, Anthony, Da Deppo, Vania, Groussin, Olivier, Kührt, Ekkehard, Thomas, Nicolas, Tubiana, Cecilia, El-Maarry, M. Ramy, La Forgia, Fiorangela, Mottola, Stefano, Pajola, Maurizio, Davidsson, Björn J. R., Schloerb, F. Peter, Fornasier, Sonia, Oklay, Nilda, Gutiérrez, Pedro J., Buratti, Bonnie J., Chmielewski, Artur B., Gulkis, Samuel, Hofstadter, Mark D., Keller, H. Uwe, Sierks, Holger, Güttler, Carsten, Küppers, Michael, Rickman, Hans, Choukroun, Mathieu, Lee, Seungwon, Lellouch, Emmanuel, Lethuillier, Anthony, Da Deppo, Vania, Groussin, Olivier, Kührt, Ekkehard, Thomas, Nicolas, Tubiana, Cecilia, El-Maarry, M. Ramy, La Forgia, Fiorangela, Mottola, Stefano, and Pajola, Maurizio
Abstract: Between 2014 December 31 and 2015 March 17, the OSIRIS cameras on Rosetta documented the growth of a 140m wide and 0.5m deep depression in the Hapi region on Comet 67P/Churyumov-Gerasimenko. This shallow pit is one of several that later formed elsewhere on the comet, all in smooth terrain that primarily is the result of airfall of coma particles. We have compiled observations of this region in Hapi by the microwave instrument MIRO on Rosetta, acquired during October and November 2014. We use thermophysical and radiative transfer models in order to reproduce the MIRO observations. This allows us to place constraints on the thermal inertia, diffusivity, chemical composition, stratification, extinction coefficients, and scattering properties of the surface material, and how they evolved during the months prior to pit formation. The results are placed in context through long-term comet nucleus evolution modelling. We propose that: 1) MIRO observes signatures that are consistent with a solid-state greenhouse effect in airfall material; 2) CO2 ice is sufficiently close to the surface to have a measurable effect on MIRO antenna temperatures, and likely is responsible for the pit formation in Hapi observed by OSIRIS; 3) the pressure at the CO2 sublimation front is sufficiently strong to expel dust and water ice outwards, and to compress comet material inwards, thereby causing the near-surface compaction observed by CONSERT, SESAME, and groundbased radar, manifested as the "consolidated terrain" texture observed by OSIRIS., Comment: 32 pages, 41 figures. This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review
Published: 2022
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13. Magnetic Properties of Asteroid (162173) Ryugu

Author: Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Hercik, David, Auster, Hans-Ulrich, Constantinescu, Dragos, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Grundmann, Jan-Thimo, Güttler, Carsten, Hillenmaier, Olaf, Ho, Tra-Mi, Hördt, Andreas, Krause, Christian, Kührt, Ekkehard, Lorda, Laurence, Matsuoka, Ayako, Motschmann, Uwe, Moussi-Soffys, Aurélie, Richter, Ingo, Sasaki, Kaname, Scholten, Frank, Stoll, Bernd, Weiss, Benjamin P., Wolff, Friederike, Glassmeier, Karl-Heinz, Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Hercik, David, Auster, Hans-Ulrich, Constantinescu, Dragos, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Grundmann, Jan-Thimo, Güttler, Carsten, Hillenmaier, Olaf, Ho, Tra-Mi, Hördt, Andreas, Krause, Christian, Kührt, Ekkehard, Lorda, Laurence, Matsuoka, Ayako, Motschmann, Uwe, Moussi-Soffys, Aurélie, Richter, Ingo, Sasaki, Kaname, Scholten, Frank, Stoll, Bernd, Weiss, Benjamin P., Wolff, Friederike, and Glassmeier, Karl-Heinz
Abstract: ©2020. The Authors. Observations of the magnetization state of asteroids indicate diverse properties. Values between 1.9 × 10 -6Am2/kg (Eros) and 10-2 Am2/kg (Braille) have been reported. A more detailed understanding of asteroidal magnetic properties allows far-reaching conclusions of the magnetization mechanism as well as the strength of the magnetic field of the solar system regions the asteroid formed in. The Hayabusa2 mission with its lander Mobile Asteroid Surface Scout is equipped with a magnetometer experiment, MasMag. MasMag is a state-of-the-art three-axis fluxgate magnetometer, successfully operated also on Philae, the Rosetta mission lander. MasMag has enabled, after Eros for the second time ever, to determine the magnetic field of an asteroid during descent and on-surface operations. The new observations show that Ryugu, a low-albedo C-type asteroid, has no detectable global magnetization, and any local magnetization is either small (< 10−6 Am2/kg) or on very small (subcentimeter) scales. This implies, for example, that energetic solar wind particles could reach and alter the surface unimpeded by strong asteroidal magnetic fields, such as minimagnetospheres in case of the Moon.
Published: 2022

14. The MASCOT Magnetometer

Author: Herčík, David, primary, Auster, Hans-Ulrich, additional, Blum, Jürgen, additional, Fornaçon, Karl-Heinz, additional, Fujimoto, Masaki, additional, Gebauer, Kathrin, additional, Güttler, Carsten, additional, Hillenmaier, Olaf, additional, Hördt, Andreas, additional, Liebert, Evelyn, additional, Matsuoka, Ayako, additional, Nomura, Reiko, additional, Richter, Ingo, additional, Stoll, Bernd, additional, Weiss, Benjamin P., additional, and Glassmeier, Karl-Heinz, additional
Published: 2016
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15. Two independent and primitive envelopes of the bilobate nucleus of comet 67P

Author: Massironi, Matteo, Simioni, Emanuele, Marzari, Francesco, Cremonese, Gabriele, Giacomini, Lorenza, Pajola, Maurizio, Jorda, Laurent, Naletto, Giampiero, Lowry, Stephen, El-Maarry, Mohamed Ramy, Preusker, Frank, Scholten, Frank, Sierks, Holger, Barbieri, Cesare, Lamy, Philippe, Rodrigo, Rafael, Koschny, Detlef, Rickman, Hans, Keller, Horst Uwe, AʼHearn, Michael F., Agarwal, Jessica, Auger, Anne-Thérèse, Barucci, Antonella M., Bertaux, Jean-Loup, Bertini, Ivano, Besse, Sebastien, Bodewits, Dennis, Capanna, Claire, Da Deppo, Vania, Davidsson, Björn, Debei, Stefano, De Cecco, Mariolino, Ferri, Francesca, Fornasier, Sonia, Fulle, Marco, Gaskell, Robert, Groussin, Olivier, Gutiérrez, Pedro J., Güttler, Carsten, Hviid, Stubbe F., Ip, Wing-Huen, Knollenberg, Jörg, Kovacs, Gabor, Kramm, Rainer, Kührt, Ekkehard, Küppers, Michael, La Forgia, Fiorangela, Lara, Luisa M., Lazzarin, Monica, Lin, Zhong-Yi, Lopez Moreno, Josè J., Magrin, Sara, Michalik, Harald, Mottola, Stefano, Oklay, Nilda, Pommerol, Antoine, Thomas, Nicolas, Tubiana, Cecilia, and Vincent, Jean-Baptiste
Published: 2015
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16. Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse

Author: Vincent, Jean-Baptiste, Bodewits, Dennis, Besse, Sébastien, Sierks, Holger, Barbieri, Cesare, Lamy, Philippe, Rodrigo, Rafael, Koschny, Detlef, Rickman, Hans, Keller, Horst Uwe, Agarwal, Jessica, AʼHearn, Michael F., Auger, Anne-Thérèse, Barucci, M. Antonella, Bertaux, Jean-Loup, Bertini, Ivano, Capanna, Claire, Cremonese, Gabriele, Da Deppo, Vania, Davidsson, Björn, Debei, Stefano, De Cecco, Mariolino, El-Maarry, Mohamed Ramy, Ferri, Francesca, Fornasier, Sonia, Fulle, Marco, Gaskell, Robert, Giacomini, Lorenza, Groussin, Olivier, Guilbert-Lepoutre, Aurélie, Gutierrez-Marques, P., Gutiérrez, Pedro J., Güttler, Carsten, Hoekzema, Nick, Höfner, Sebastian, Hviid, Stubbe F., Ip, Wing-Huen, Jorda, Laurent, Knollenberg, Jörg, Kovacs, Gabor, Kramm, Rainer, Kührt, Ekkehard, Küppers, Michael, La Forgia, Fiorangela, Lara, Luisa M., Lazzarin, Monica, Lee, Vicky, Leyrat, Cédric, Lin, Zhong-Yi, Lopez Moreno, Josè J., Lowry, Stephen, Magrin, Sara, Maquet, Lucie, Marchi, Simone, Marzari, Francesco, Massironi, Matteo, Michalik, Harald, Moissl, Richard, Mottola, Stefano, Naletto, Giampiero, Oklay, Nilda, Pajola, Maurizio, Preusker, Frank, Scholten, Frank, Thomas, Nicolas, Toth, Imre, and Tubiana, Cecilia
Published: 2015
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17. AMBITION – comet nucleus cryogenic sample return

Author: Bockelée-Morvan, D., primary, Filacchione, Gianrico, additional, Altwegg, Kathrin, additional, Bianchi, Eleonora, additional, Bizzarro, Martin, additional, Blum, Jürgen, additional, Bonal, Lydie, additional, Capaccioni, Fabrizio, additional, Choukroun, Mathieu, additional, Codella, Claudio, additional, Cottin, Hervé, additional, Davidsson, Björn, additional, De Sanctis, Maria Cristina, additional, Drozdovskaya, Maria N., additional, Engrand, Cécile, additional, Galand, Marina, additional, Güttler, Carsten, additional, Henri, Pierre, additional, Herique, Alain, additional, Ivanovski, Stavro, additional, Kokotanekova, Rosita, additional, Levasseur-Regourd, Anny-Chantal, additional, Miller, Kelly E., additional, Rotundi, Alessandra, additional, Schönbächler, Maria, additional, Snodgrass, Colin, additional, Thomas, Nicolas, additional, Tubiana, Cecilia, additional, Ulamec, Stephan, additional, and Vincent, Jean-Baptiste, additional
Published: 2021
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18. Magnetic Properties of Asteroid (162173) Ryugu

Author: Hercik, David, Auster, Hans-Ulrich, Constantinescu, Dragos, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Grundmann, Jan-Thimo, Güttler, Carsten, Hillenmaier, Olaf, Ho, Tra-Mi, Hördt, Andreas, Krause, Christian, Kührt, Ekkehard, Lorda, Laurence, Matsuoka, Ayako, Motschmann, Uwe, Moussi-Soffys, Aurélie, Richter, Ingo, Sasaki, Kaname, Scholten, Frank, Stoll, Bernd, Weiss, Benjamin P, Wolff, Friederike, Glassmeier, Karl-Heinz, Hercik, David, Auster, Hans-Ulrich, Constantinescu, Dragos, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Grundmann, Jan-Thimo, Güttler, Carsten, Hillenmaier, Olaf, Ho, Tra-Mi, Hördt, Andreas, Krause, Christian, Kührt, Ekkehard, Lorda, Laurence, Matsuoka, Ayako, Motschmann, Uwe, Moussi-Soffys, Aurélie, Richter, Ingo, Sasaki, Kaname, Scholten, Frank, Stoll, Bernd, Weiss, Benjamin P, Wolff, Friederike, and Glassmeier, Karl-Heinz
Abstract: ©2020. The Authors. Observations of the magnetization state of asteroids indicate diverse properties. Values between 1.9 × 10 -6Am2/kg (Eros) and 10-2 Am2/kg (Braille) have been reported. A more detailed understanding of asteroidal magnetic properties allows far-reaching conclusions of the magnetization mechanism as well as the strength of the magnetic field of the solar system regions the asteroid formed in. The Hayabusa2 mission with its lander Mobile Asteroid Surface Scout is equipped with a magnetometer experiment, MasMag. MasMag is a state-of-the-art three-axis fluxgate magnetometer, successfully operated also on Philae, the Rosetta mission lander. MasMag has enabled, after Eros for the second time ever, to determine the magnetic field of an asteroid during descent and on-surface operations. The new observations show that Ryugu, a low-albedo C-type asteroid, has no detectable global magnetization, and any local magnetization is either small (< 10−6 Am2/kg) or on very small (subcentimeter) scales. This implies, for example, that energetic solar wind particles could reach and alter the surface unimpeded by strong asteroidal magnetic fields, such as minimagnetospheres in case of the Moon.
Published: 2021

19. Thermal metamorphoses of cosmic dust aggregates: Experiments by furnace, electrical gas discharge, and radiative heating

Author: Poppe, Torsten, Güttler, Carsten, and Springborn, Tilman
Published: 2010
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20. The ESA Hera mission to the binary asteroid Didymos: planetary defense and bonus science

Author: Michel, Patrick, Kueppers, Michael, Carnelli, Ian, Bagatin, A. Campo, Carry, Benoit, Charnoz, Sebastien, Leon de, Julia, Fitzsimmons, Alan, Green, Simon, Güttler, Carsten, Herique, Alain, Jutzi, Martin, Karatekin, Özgür, Murdoch, Naomi, Pravec, Petr, Sierks, Holger, Snodgrass, Colin, Tortora, Paolo, Tsiganis, Kleomenis, Ulamec, Stephan, Vincent, Jean-Baptiste, Wünnemann, Kai, Cheng, Andy, Rivkin, Andrew D., Chabot, Nancy L., Barnouin, Olivier S., Ernst, Carolyn M., Richardson, Derek C., and Stickle, Angela
Subjects: Planetengeodäsie, Hera mission, asteroid Didymos, Nutzerzentrum für Weltraumexperimente (MUSC)
Abstract: The Hera mission has been approved for development and launch in the new ESA Space SafetyProgramme by the ESA Council at Ministerial Level, Space19+, in November 2019. Hera will contributeto the first deflection test of an asteroid, in the framework of the international NASA- and ESA supportedAsteroid Impact and Deflection Assessment (AIDA) collaboration.The impact of the NASA DART (Double Asteroid Redirection Test) spacecraft on the natural satelliteof the binary asteroid Didymos in late September 2022 will change its orbital period around Didymos.As Didymos is an eclipsing binary, and close to the Earth on this date, the change can be detected byEarth-based observers. ESA’s Hera spacecraft will rendezvous with Didymos four years after the impact.While performing the measurements necessary to understand the effect of the DART impact on Didymos’secondary, in particular its mass, its internal structure, the direct determination of the momentum transferand the detailed characterization of the crater left by DART, Hera will provide unique information onmany current issues in asteroid science.Hera will rendezvous for the first time with a binary asteroid, and in particular its secondary, of only160 m in diameter. So far, no mission has visited such a small rock in space. Moreover, for the firsttime, internal and subsurface properties will be directly measured. How do binaries form? What does a160 m-size rock in space look like? What are its internal properties? And what will be the size and themorphology of the crater left by DART, which will provide the first impact experiment at full asteroid scaleusing an impact speed close to the average speed between asteroids? What will be the exact momentumtransferred by DART, which needs the precise measurement of the mass of the target by Hera? Thesequestions and many others will be addressed by Hera as a natural outcome of its investigations focusedon planetary defense.The scientific legacy of the Hera mission will extend far beyond the core aims of planetary defense.Hera is thus the European contribution to the international asteroid exploration era.Acknowledgement: The authors acknowledge funding support from ESA and from the EuropeanUnion’s Horizon 2020 research and innovation programme under grant agreement No 870377 (projectNEO-MAPP).
Published: 2020

21. AMBITION, the Comet Nucleus Cryogenic Sample Return mission for ESA Voyage 2050 program

Author: Filacchione, Gianrico, Bockelée-Morvan, Dominique, Altwegg, Kathrin, Bianchi, Eleonora, Bizzarro, Martin, Blum, Jürgen, Bonal, Lydie, Capaccioni, Fabrizio, Codella, Claudio, Choukroun, Mathieu, Cottin, Hervé, Davidsson, Björn, De Sanctis, Maria Cristina, Drozdovskaya, Maria, Engrand, Cécile, Galand, Marina, Güttler, Carsten, Henri, Pierre, Hérique, Alain, Ivanovski, Stavro L., Kokotanekova, Rosita, Levasseur-Regourd, Anny Chantal, Miller, Kelly E., Rotundi, Alessandra, Schönbächler, Maria, Snodgrass, Colin, Thomas, Nicolas, Tubiana, Cécilia, Ulamec, Stefan, Vincent, Jean-Baptiste, Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Physikalisches Institut [Bern], Universität Bern [Bern] (UNIBE), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Centre for Star and Planet Formation (STARPLAN), Globe Institute, Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], INAF - Osservatorio Astrofisico di Arcetri (OAA), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Center for Space and Habitability (CSH), University of Bern, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Department of Physics [Imperial College London], Imperial College London, Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), INAF - Osservatorio Astronomico di Trieste (OAT), European Southern Observatory [Garching], PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Southwest Research Institute [San Antonio] (SwRI), Department of Earth Sciences [Swiss Federal Institute of Technology - ETH Zürich] (D-ERDW), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Institute for Astronomy [Edinburgh] (IfA), University of Edinburgh, Deutsches Zentrum für Luft- und Raumfahrt [Köln] (DLR), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Cardon, Catherine, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Universität Bern [Bern], Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), California Institute of Technology (CALTECH)-NASA, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National d’Études Spatiales [Paris] (CNES), and Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)
Subjects: [SDU] Sciences of the Universe [physics], [SDU]Sciences of the Universe [physics], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2020

22. CoPhyLab: recent and future experiments - an overview

Author: Gundlach, Bastian, primary, Blum, Jürgen, additional, Bischoff, Dorothea, additional, Molinski, Noah, additional, Lethuillier, Anthony, additional, Kreuzig, Christopher, additional, Feller, Clément, additional, Pommerol, Antoine, additional, Thomas, Nicolas, additional, Kaufmann, Erika, additional, Schweighart, Maria, additional, Kargl, Günter, additional, Sierks, Holger, additional, Güttler, Carsten, additional, Otto, Katharina, additional, Haack, David, additional, Kührt, Ekkehard, additional, Knollenberg, Jörg, additional, Zhang, Xiaojing, additional, and Hagermann, Axel, additional
Published: 2020
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23. Global-scale brittle plastic rheology at the cometesimals merging of comet 67P/Churyumov–Gerasimenko

Author: Franceschi, Marco, primary, Penasa, Luca, additional, Massironi, Matteo, additional, Naletto, Giampiero, additional, Ferrari, Sabrina, additional, Fondriest, Michele, additional, Bodewits, Dennis, additional, Güttler, Carsten, additional, Lucchetti, Alice, additional, Mottola, Stefano, additional, Pajola, Maurizio, additional, Toth, Imre, additional, Deller, Jacob, additional, Sierks, Holger, additional, and Tubiana, Cecilia, additional
Published: 2020
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24. Magnetic Properties of Asteroid (162173) Ryugu

Author: Hercik, David, primary, Auster, Hans‐Ulrich, additional, Constantinescu, Dragos, additional, Blum, Jürgen, additional, Fornaçon, Karl‐Heinz, additional, Fujimoto, Masaki, additional, Gebauer, Kathrin, additional, Grundmann, Jan‐Thimo, additional, Güttler, Carsten, additional, Hillenmaier, Olaf, additional, Ho, Tra‐Mi, additional, Hördt, Andreas, additional, Krause, Christian, additional, Kührt, Ekkehard, additional, Lorda, Laurence, additional, Matsuoka, Ayako, additional, Motschmann, Uwe, additional, Moussi‐Soffys, Aurélie, additional, Richter, Ingo, additional, Sasaki, Kaname, additional, Scholten, Frank, additional, Stoll, Bernd, additional, Weiss, Benjamin P., additional, Wolff, Friederike, additional, and Glassmeier, Karl‐Heinz, additional
Published: 2020
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25. The Rocky‐Like Behavior of Cometary Landslides on 67P/Churyumov‐Gerasimenko

Author: Lucchetti, Alice, primary, Penasa, Luca, additional, Pajola, Maurizio, additional, Massironi, Matteo, additional, Brunetti, Maria Teresa, additional, Cremonese, Gabriele, additional, Oklay, Nilda, additional, Vincent, Jean‐Baptiste, additional, Mottola, Stefano, additional, Fornasier, Sonia, additional, Sierks, Holger, additional, Naletto, Giampiero, additional, Lamy, Philippe L., additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Davidsson, Bjorn, additional, Barbieri, Cesare, additional, Barucci, Maria Antonietta, additional, Bertaux, Jean‐Loup, additional, Bertini, Ivano, additional, Bodewits, Dennis, additional, Cambianica, Pamela, additional, Da Deppo, Vania, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Deller, Jacob, additional, Ferrari, Sabrina, additional, Ferri, Francesca, additional, Franceschi, Marco, additional, Fulle, Marco, additional, Gutiérrez, Pedro, additional, Güttler, Carsten, additional, Ip, Wing‐H., additional, Keller, Uwe, additional, Lara, Luisa, additional, Lazzarin, Monica, additional, Moreno, Jose Lopez, additional, Marzari, Francesco, additional, and Tubiana, Cecilia, additional
Published: 2019
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26. AMBITION Comet Nucleus Cryogenic Sample Return

Author: Bockelée-Morvan, D., Filacchione, Gianrico, Altwegg, Kathrin, Bianchi, Eleonora, Bizzarro, Martin, Blum, Jürgen, Bonal, Lydie, Capaccioni, Fabrizio, Codella, Claudio, Choukroun, Mathieu, Cottin, Hervé, Davidsson, Björn, De Sanctis, Maria Cristina, Drozdovskaya, Maria, Engrand, Cécile, Galand, Marina, Güttler, Carsten, Henri, Pierre, Herique, Alain, Ivanoski, Stavro, Kokotanekova, Rosita, Levasseur-Regourd, Anny Chantal, Miller, Kelly E., Rotundi, Alessandra, Schönbächler, Maria, Snodgrass, Colin, Thomas, Nicolas, Tubiana, Cecilia, Ulamec, Stefan, Vincent, Jean-Baptiste, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Physikalisches Institut [Bern], Universität Bern [Bern], Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre for Star and Planet Formation (STARPLAN), Globe Institute, Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Natural History Museum of Denmark, Faculty of Science [Copenhagen], Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig [Braunschweig], INAF - Osservatorio Astrofisico di Arcetri (OAA), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Center for Space and Habitability (CSH), University of Bern, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Space and Atmospheric Physics Group [London], Blackett Laboratory, Imperial College London-Imperial College London, Department of Physics [Imperial College London], Imperial College London, Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Centre National d’Études Spatiales [Paris] (CNES), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Trieste (OAT), European Southern Observatory (ESO), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Southwest Research Institute [San Antonio] (SwRI), Department of Earth Sciences [ETH Zürich] (D-ERDW), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Institute for Astronomy [Edinburgh] (IfA), University of Edinburgh, German Aerospace Center (DLR), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National d’Études Spatiales [Paris] (CNES), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), PLANETO - LATMOS, Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Department of Earth Sciences [Swiss Federal Institute of Technology - ETH Zürich] (D-ERDW), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), California Institute of Technology (CALTECH)-NASA, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, and COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Earth and Planetary Astrophysics (astro-ph.EP), [SDU]Sciences of the Universe [physics], FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics - Earth and Planetary Astrophysics
Abstract: This white paper proposes that AMBITION, a Comet Nucleus Sample Return mission, be a cornerstone of ESA's Voyage 2050 programme. We summarise some of the most important questions still open in cometary science after the successes of the Rosetta mission, many of which require sample analysis using techniques that are only possible in laboratories on Earth. We then summarise measurements, instrumentation and mission scenarios that can address these questions, with a recommendation that ESA select an ambitious cryogenic sample return mission. Rendezvous missions to Main Belt comets and Centaurs are compelling cases for M-class missions, expanding our knowledge by exploring new classes of comets. AMBITION would engage a wide community, drawing expertise from a vast range of disciplines within planetary science and astrophysics. With AMBITION, Europe will continue its leadership in the exploration of the most primitive Solar System bodies., 8 figures, 26 pages
Published: 2019

27. The inner coma of 67P/Churyumov-Gerasimenko as seen from OSIRIS and VIRTIS on board Rosetta

Author: Tubiana, Cecilia, Rinaldi, Giovanna, Güttler, Carsten, Xuanyu, Hu, Shi, Xian, La Forgia, Fiorangela, Bockelee-Morvan, Dominique, Capaccioni, Fabrizio, Ciarniello, Mauro, Erard, Stephan, Filacchione, Gianrico, Formisano, Michelangelo, Leyrat, Cedric, Longobardo, Andrea, Raponi, Andrea, Sierks, Holger, and Tozzi, Gian Paolo
Published: 2018

28. Centrifugal Experiments with Simulated Regolith:Effects of Gravity, Size Distribution, and Particle Shape on Porosity

Author: Omura, Tomomi, Kiuchi, masato, Güttler, Carsten, Nakamura, Akiko M., Omura, Tomomi, Kiuchi, masato, Güttler, Carsten, and Nakamura, Akiko M.
Abstract: Porosity is a key characteristic of the regolith on the surface of small bodies. The porosity of the regolith on the surface of asteroids is changed by applied pressure, and the relationship between pressure and porosity depends on the particle properties of the regolith. We performed compression measurements on samples of different materials, particle size distributions, and shapes to examine the relationship between particle size and pressure required for compression. We used a centrifuge and a compression testing machine for the experiments. The applied pressure for the centrifuge and the compression testing machine experiments ranged from 10^2 to 5x10^3 Pa and from 10^4 to 5x10^6 Pa, respectively. The initial porosity before compression was generally higher for samples with smaller particles and narrower particle size distributions. A sample compressed more easily when it consisted of smaller particles, probably due to smaller frictional forces between particles. We estimated the porosity of granular asteroids based on the results of our experiments. The estimated porosity at the center of a homogeneous asteroid with a radius of 50 km is 0.43. This porosity is typical of the porosity of asteroids of similar size.
Published: 2017

29. The MASCOT Magnetometer

Author: Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Weiss, Benjamin P, Herčík, David, Auster, Hans-Ulrich, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Güttler, Carsten, Hillenmaier, Olaf, Hördt, Andreas, Liebert, Evelyn, Matsuoka, Ayako, Nomura, Reiko, Richter, Ingo, Stoll, Bernd, Glassmeier, Karl-Heinz, Weiss, Benjamin P., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, Weiss, Benjamin P, Herčík, David, Auster, Hans-Ulrich, Blum, Jürgen, Fornaçon, Karl-Heinz, Fujimoto, Masaki, Gebauer, Kathrin, Güttler, Carsten, Hillenmaier, Olaf, Hördt, Andreas, Liebert, Evelyn, Matsuoka, Ayako, Nomura, Reiko, Richter, Ingo, Stoll, Bernd, Glassmeier, Karl-Heinz, and Weiss, Benjamin P.
Abstract: The Mobile Asteroid Scout (MASCOT) is a small lander on board the Hayabusa2 mission of the Japan Aerospace Exploration Agency to the asteroid 162173 Ryugu. Among the instruments on MASCOT is a fluxgate magnetometer, the MASCOT Magnetometer (MasMag). The magnetometer is a lightweight ( ∼280 g∼280 g ) and low power ( ∼0.5 W∼0.5 W ) triaxial fluxgate magnetometer. Magnetic field measurements during the landing period and during the surface operational phase shall provide information about any intrinsic magnetic field of the asteroid and its remanent magnetization. This could provide important constraints on planet formation and the thermal and aqueous evolution of primitive asteroids., Thomas F. Peterson, United States. National Aeronautics and Space Administration. Emerging Worlds Program
Published: 2017

30. Rosetta Lander-Philae: Operations on comet 67P/Churyumov-Gerasimenko, Analysis of wake-up activities and final state

Author: Ulamec, Stephan, Biele, Jens, Fantinati, Cinzia, Lommatsch, Valentina, Geurts, Koen, Maibaum, Michael, Delmas, Cedric, Jurado, Eric, Sierks, Holger, O'Rourke, Laurence, Tubiana, Cecilia, and Güttler, Carsten
Subjects: Philae, Rosetta-Lander, Nutzerzentrum für Weltraumexperimente (MUSC)
Abstract: Philae, a comet Lander, part of the ESA Rosetta mission successfully landed on comet 67P/Churyumov- Gerasimenko on November 12th, 2014. After several (unplanned) bounces it performed a First Scientific Sequence (FSS), based on the energy stored in it's on board batteries. All ten instruments of the Philae payload have been operated at least once. Due to the fact that the original landing site was poorly illuminated, Philae went into hibernation on November 15th, but signals from the Lander were received again in June and July 2015. However, various attempts to re-establish reliable and stable communications links, failed. Analysis of the data gained during FSS, and during the contacts in June and July 2015 allows conclusions on the state of Philae. By now, images from the OSIRIS camera aboard the Rosetta Orbiter have allowed the identification of the exact position of Philae and its attitude, relative to the local surface terrain. The paper also gives an overview of the implications of Philae results for future engineering comet models, required particularly for the design of in-situ (landing) or sample return missions. Rosetta is an ESA mission with contributions from its member states and NASA. Rosetta's Philae Lander is provided by a consortium led by DLR, MPS, CNES and ASI with additional contributions from Hungary, UK, Finland, Ireland and Austria.
Published: 2016

31. First analysis of the size-frequency distribution of boulders ≥ 7m on comet 67P

Author: Pajola, Maurizio, Vincent, Jean-Baptiste, Güttler, Carsten, Lee, Jui-Chi, Massironi, Matteo, Bertini, Ivano, Simioni, Emanuele, Marzari, Francesco, Giacomini, Lorenza, Barbieri, Cesare, Cremonese, Gabriele, Naletto, Giampiero, Pommerol, Antoine, El-Maarry, Mohamed Ramy, Besse, Sébastien, Küppers, Michael, La Forgia, Fiorangela, Lazzarin, Monica, Thomas, Nicholas, Auger, Anne-Thérèse, Ip, W.-H., Lin, Zhong-Yi, Sierks, Holger, A'Hearn, M. F., Barucci, Maria Antonella, Bertaux, Jean-Loup, da Deppo, Vania, Davidsson, Björn, de Cecco, M., Debei, Stefano, Ferri, Francesca, Fornasier, Sonia, Fulle, Marco, Groussin, Olivier, Gutierrez, Pedro J., Hviid, Stubbe F., Jorda, Laurent, Keller, Horst Uwe, Knollenberg, Jörg, Koschny, Detlef, Kramm, Rainer, Kürt, Ekkehard, Lamy, Philippe, Lara, Luisa M., López-Moreno, José J., Magrin, Sara, Michalik, Harald, Moissl, Richard, Mottola, Stefano, Oklay, Nilda, Preusker, Frank, Rickman, Hans, Rodrigo, Rafael, Scholten, Frank, Tubiana, Cecilia, Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Università degli Studi di Padova = University of Padua (Unipd), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Institute of Space Science [Taiwan], National Central University [Taiwan] (NCU), Dipartimento di Geoscienze [Padova], CNR Istituto di Fotonica e Nanotecnologie [Padova] (IFN), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Fisica e Astronomia 'Galileo Galilei', INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Department of Information Engineering [Padova] (DEI), Physikalisches Institut [Bern], Universität Bern [Bern] (UNIBE), European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA), Operations Department (ESAC), European Space Astronomy Centre (ESAC), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Department of Astronomy [College Park], University of Maryland [College Park], University of Maryland System-University of Maryland System, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), CNR Institute for Photonics and Nanotechnologies (IFN), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Università degli Studi di Trento (UNITN), Department of Industrial Engineering [Padova], Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), INAF - Osservatorio Astronomico di Trieste (OAT), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), DLR Institut für Planetenforschung, and Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR)
Subjects: [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: International audience
Published: 2016

32. Free collisions in a microgravity many-particle experiment. I. Dust aggregate sticking at low velocities

Author: Weidling, René, Güttler, Carsten, and Blum, Jürgen
Subjects: Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract: Over the past years the processes involved in the growth of planetesimals have extensively been studied in the laboratory. Based on these experiments, a dust-aggregate collision model was developed upon which computer simulations were based to evaluate how big protoplanetary dust aggregates can grow and to analyze which kinds of collisions are relevant in the solar nebula and are worth further studies in the laboratory. The sticking threshold velocity of millimeter-sized dust aggregates is such a critical value that had so far only theoretically been derived, as the relevant velocities could not be reached in the laboratory. We developed a microgravity experiment that allows us for the first time to study free collisions of mm-sized dust aggregates down to velocities of ~0.1 cm/s to assess this part of the protoplanetary dust evolution model. Here, we present the results of 125 free collisions between dust aggregates of 0.5 to 2 mm diameter. Seven collisions with velocities between 0.2 and 3 cm/s led to sticking, suggesting a transition from perfect sticking to perfect bouncing with a certain sticking probability instead of a sharp velocity threshold. We developed a model to explain the physical processes involved in dust-aggregate sticking, derived dynamic material properties of the dust aggregates from the results of the collisions, and deduced the velocity below which aggregates always stick. For millimeter-sized porous dust aggregates this velocity is 8e-5 m/s., Comment: accepted by Icarus
Published: 2012

33. Reconstruction of the flight and attitude of Rosetta's lander Philae

Author: Heinisch, Philip, primary, Auster, Hans-Ulrich, additional, Plettemeier, Dirk, additional, Kofman, Wlodek, additional, Herique, Alain, additional, Statz, Christoph, additional, Hahnel, Ronny, additional, Rogez, Yves, additional, Richter, Ingo, additional, Hilchenbach, Martin, additional, Jurado, Eric, additional, Garmier, Romain, additional, Martin, Thierry, additional, Finke, Felix, additional, Güttler, Carsten, additional, Sierks, Holger, additional, and Glassmeier, Karl-Heinz, additional
Published: 2017
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34. Rotational Variation of Outgassing Morphology in 67P/Churyumov-Gerasimenko

Author: A'Hearn, Michael F., Bodewits, Dennis, La Forgia, Fiorangela, Lara, Luisa M., Agarwal, Jessica, Bertaux, Jean-Loup, Cremonese, Gabriele, Davidsson, Björn, Fornasier, Sonia, Güttler, Carsten, Knollenberg, Jorg, Lazzarin, Monica, Leyrat, Cedric, Lin, Zhong-Yi, Magrin, Sara, Naletto, Giampiero, Sierks, Holger, Snodgrass, Colin, Thomas, Nicolas, Tubiana, Cecilia, Vincent, Jean-Baptiste, Department of Astronomy [College Park], University of Maryland [College Park], University of Maryland System-University of Maryland System, Dipartimento di Fisica e Astronomia 'Galileo Galilei', Universita degli Studi di Padova, Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Department of Physics and Astronomy [Uppsala], Uppsala University, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), DLR Institute of Planetary Research, German Aerospace Center (DLR), Institute of Astronomy [Taiwan] (IANCU), National Central University [Taiwan] (NCU), Department of Industrial Engineering [Padova], Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), The Open University [Milton Keynes] (OU), Universität Bern [Bern], Università degli Studi di Padova = University of Padua (Unipd), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), and Universität Bern [Bern] (UNIBE)
Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Astrophysics::Earth and Planetary Astrophysics
Abstract: International audience; Images of the innermost coma of comet 67P/Churyumov-Gerasimenko taken in various gaseous species with the OSIRIS camera on Rosetta show localized sources that expand hemispherically, contrary to the narrow jets seen in broad band images, which are domnated by continuum radiation reflected by the grains. The gaseous images have the continuum removed, but we have not derived column densities because of uncertainty about physical processes. Thus the morphology is the most reliable aspect of the data. We will compare the morphology in various species and attempt to estimate the decoupling distance of the grains from the gas. We will also attempt to relate these features to the point of origin on the nucleus.
Published: 2015

35. Analysis of Opposition effect on 67P/Churyumov-Gerasimenko’s nucleus from Rosetta-OSIRIS images

Author: Masoumzadeh, Nafiseh, Feller, Clement, Fornasier, Sonia, Hasselmann, Pedro H., Leyrat, Cédric, Barucci, Maria Antonetta, Oklay, Nilda, Vincent, Jean-Baptiste, Sierks, Holger, Preusker, Frank, Scholten, Frank, Tubiana, Cecilia, Güttler, Carsten, and OSIRIS, Team
Subjects: 67P, Rosetta, Planetengeodäsie, OSIRIS, opposition effect
Abstract: We aim to assess two mechanisms involved in opposition effect phenomenon, i.e. shadow hiding effect (SHOE) and coherent backscattering effect (CBOE), using OSIRIS images taken on the 14th of February 2015.
Published: 2015

36. Comet 67P/Churyumov-Gerasimenko: First science results by Rosetta/OSIRIS

Author: Thomas, Nicolas, Sierks, Holger, Barbieri, Cesare, Lamy, Philippe, Rodrigo, Rafael, Koschny, Detlef, Rickman, Hans, Agarwal, Jessica, A Hearn, Michael, Angrilli, Francesco, Barucci, Antonella, Bertaux, Jean-Loup, Bertini, Ivano, Besse, Sebastien, Bodewits, Dennis, Capanna, Claire, Cremonese, Gabriele, Da Deppo, Vania, Davidsson, Björn, Debei, Stefano, Cecco, Mariolino, Ferri, Francesca, Fornasier, Sonia, marco fulle, Gaskell, Robert, Groussin, Olivier, Güttler, Carsten, Gutierrez, Pedroj, Hviid, Stubbe, Ip, Wing-Huen, Jorda, Laurent, Keller, Horst Uwe, Knollenberg, Jörg, Kramm, Rainer, Kührt, Ekkehard, Küppers, Michael, Laforgia, Fiorangela, Lara, Luisa, Lazzarin, Monica, Leyrat, Cedric, Lopez Moreno, Jose Juan, Lowry, Stephen, Magrin, Sara, Marchi, Simone, Marzari, Francesco, Michalik, Harald, Mottola, Stefano, Naletto, Giampiero, Oklay, Nilda, Pajola, Maurizio, Sabau, Lola, Snodgrass, Colin, Tubiana, Cecilia, Vincent, Jean-Baptiste, and Wenzel, Peter
Abstract: ESA's Rosetta mission arrived on August 6, 2014, at target comet 67P/Churyumov-Gerasimenko after 10 years of cruise. OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) is the scientific imaging system onboard Rosetta. It comprises a Narrow Angle Camera (NAC) for nucleus surface and dust studies and a Wide Angle Camera (WAC) for the wide field coma investigations.We present the first science results achieved by OSIRIS from the arrival at the comet throughout the mapping phase. The overview will cover surface morphology and activity of the nucleus as seen in gas, dust, and local jets.AcknowledgementsOSIRIS was built by a consortium led by the Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany, in collaboration with CISAS, University of Padova, Italy, the Laboratoire d'Astrophysique de Marseille, France, the Instituto de Astrofísica de Andalucia, CSIC, Granada, Spain, the Scientific Support Office of the European Space Agency, Noordwijk, The Netherlands, the Instituto Nacional de Técnica Aeroespacial, Madrid, Spain, the Universidad Politéchnica de Madrid, Spain, the Department of Physics and Astronomy of Uppsala University, Sweden, and the Institut für Datentechnik und Kommunikationsnetze der Technischen Universität Braunschweig, Germany. The support of the national funding agencies of Germany (DLR), France (CNES), Italy (ASI), Spain (MEC), Sweden (SNSB), and the ESA Technical Directorate is gratefully acknowledged. We thank the Rosetta Science Ground Segment at ESAC, the Rosetta Mission Operations Centre at ESOC and the Rosetta Project at ESTEC for their outstanding work enabling the science return of the Rosetta Mission.
Published: 2014

37. Gas outflow and dust transport of comet 67P/Churyumov–Gerasimenko

Author: Lai, Ian-Lin, primary, Ip, Wing-Huen, additional, Su, Cheng-Chin, additional, Wu, Jong-Shinn, additional, Lee, Jui-Chi, additional, Lin, Zhong-Yi, additional, Liao, Ying, additional, Thomas, Nicolas, additional, Sierks, Holger, additional, Barbieri, Cesare, additional, Lamy, Philippe, additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst Uwe, additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Barucci, Maria Antonella, additional, Bertaux, Jean-Loup, additional, Bertini, Ivano, additional, Boudreault, Steven, additional, Cremonese, Gabriele, additional, Da Deppo, Vania, additional, Davidsson, Björn, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Deller, Jakob, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Groussin, Olivier, additional, Gutiérrez, Pedro J., additional, Güttler, Carsten, additional, Hofmann, Marc, additional, Hviid, Stubbe F., additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kovacs, Gabor, additional, Kramm, J.-Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, Lara, Luisa M., additional, Lazzarin, Monica, additional, Lopez Moreno, Josè J., additional, Marzari, Francesco, additional, Naletto, Giampiero, additional, Oklay, Nilda, additional, Shi, Xian, additional, Tubiana, Cecilia, additional, and Vincent, Jean-Baptiste, additional
Published: 2016
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38. Geomorphological mapping of comet 67P/Churyumov–Gerasimenko’s Southern hemisphere

Author: Lee, Jui-Chi, primary, Massironi, Matteo, additional, Ip, Wing-Huen, additional, Giacomini, Lorenza, additional, Ferrari, Sabrina, additional, Penasa, Luca, additional, El-Maarry, Mohamed Ramy, additional, Pajola, Maurizio, additional, Lai, Ian-Lin, additional, Lin, Zhong-Yi, additional, Ferri, Francesca, additional, Sierks, Holger, additional, Barbieri, Cesare, additional, Lamy, Philippe, additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst Uwe, additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Barucci, Maria Antonella, additional, Bertaux, Jean-Loup, additional, Bertini, Ivano, additional, Cremonese, Gabriele, additional, Da Deppo, Vania, additional, Davidsson, Björn, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Deller, Jakob, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Groussin, Olivier, additional, Gutiérrez, Pedro J., additional, Güttler, Carsten, additional, Hofmann, Marc, additional, Hviid, Stubbe F., additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kovacs, Gabor, additional, Kramm, J.-Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, Lara, Luisa M., additional, Lazzarin, Monica, additional, Marzari, Francesco, additional, Lopez Moreno, Josè J., additional, Naletto, Giampiero, additional, Oklay, Nilda, additional, Shi, Xian, additional, Thomas, Nicolas, additional, Tubiana, Cecilia, additional, and Vincent, Jean-Baptiste, additional
Published: 2016
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39. Attitude reconstruction of ROSETTA׳s Lander PHILAE using two-point magnetic field observations by ROMAP and RPC-MAG

Author: Heinisch, Philip, primary, Auster, Hans-Ulrich, additional, Richter, Ingo, additional, Hercik, David, additional, Jurado, Eric, additional, Garmier, Romain, additional, Güttler, Carsten, additional, and Glassmeier, Karl-Heinz, additional
Published: 2016
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40. Aswan site on comet 67P/Churyumov-Gerasimenko: Morphology, boulder evolution, and spectrophotometry

Author: Pajola, Maurizio, primary, Oklay, Nilda, additional, La Forgia, Fiorangela, additional, Giacomini, Lorenza, additional, Massironi, Matteo, additional, Bertini, Ivano, additional, El-Maarry, M. R., additional, Marzari, Francesco, additional, Preusker, Frank, additional, Scholten, Frank, additional, Höfner, Sebastian, additional, Lee, Jui-Chi, additional, Vincent, Jean-Baptiste, additional, Groussin, Olivier, additional, Naletto, Giampiero, additional, Lazzarin, Monica, additional, Barbieri, Cesare, additional, Sierks, Holger, additional, Lamy, Philippe, additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst U., additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Barucci, Maria A., additional, Bertaux, Jean-Loup, additional, Cremonese, Gabriele, additional, Deppo, Vania Da, additional, Davidsson, Björn, additional, De Cecco, Mariolino, additional, Debei, Stefano, additional, Ferri, Francesca, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Güttler, Carsten, additional, Gutierrez, Pedro J., additional, Hviid, Stubbe F., additional, Ip, Wing-Huen, additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kramm, J.-Rainer, additional, Küppers, Michael, additional, Kürt, Ekkehard, additional, Lara, Luisa M., additional, Lin, Zhong-Yi, additional, Lopez Moreno, Jose J., additional, Magrin, Sara, additional, Michalik, Harald, additional, Mottola, Stefano, additional, Thomas, Nicholas, additional, and Tubiana, Cecilia, additional
Published: 2016
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41. The southern hemisphere of 67P/Churyumov-Gerasimenko: Analysis of the preperihelion size-frequency distribution of boulders ≥7 m

Author: Pajola, Maurizio, primary, Lucchetti, Alice, additional, Vincent, Jean-Baptiste, additional, Oklay, Nilda, additional, El-Maarry, Mohamed R., additional, Bertini, Ivano, additional, Naletto, Giampiero, additional, Lazzarin, Monica, additional, Massironi, Matteo, additional, Sierks, Holger, additional, Barbieri, Cesare, additional, Lamy, Philippe, additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst U., additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Barucci, Maria A., additional, Bertaux, Jean-Loup, additional, Boudreault, Steve, additional, Cremonese, Gabriele, additional, Deppo, Vania Da, additional, Davidsson, Björn, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Deller, Jakob, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Gicquel, Adeline, additional, Groussin, Olivier, additional, Gutierrez, Pedro J., additional, Güttler, Carsten, additional, Hofmann, Marc, additional, Höfner, Sebastian, additional, Hviid, Stubbe F., additional, Ip, Wing-Huen, additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kramm, J.-Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, La Forgia, Fiorangela, additional, Lara, Luisa M., additional, Lee, Jui-Chi, additional, Lin, Zhong-Yi, additional, Lopez Moreno, Jose J., additional, Marzari, Francesco, additional, Michalik, Harald, additional, Mottola, Stefano, additional, Preusker, Frank, additional, Scholten, Frank, additional, Thomas, Nicholas, additional, Toth, Imre, additional, and Tubiana, Cecilia, additional
Published: 2016
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42. Centrifugal Experiments with Simulated Regolith: Effects of Gravity, Size Distribution, and Particle Shape on Porosity

Author: OMURA, Tomomi, primary, KIUCHI, Masato, additional, GÜTTLER, Carsten, additional, and NAKAMURA, Akiko M., additional
Published: 2016
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43. The stratification of regolith on celestial objects

Author: Schräpler, Rainer, Blum, Jürgen, von Borstel, Ingo, Güttler, Carsten, Schräpler, Rainer, Blum, Jürgen, von Borstel, Ingo, and Güttler, Carsten
Abstract: All atmosphere-less planetary bodies are covered with a dust layer, the so-called regolith, which determines the optical, mechanical and thermal properties of their surface. These properties depend on the regolith material, the size distribution of the particles it consists of, and the porosity to which these particles are packed. We performed experiments in parabolic flights to determine the gravity dependency of the packing density of regolith for solid-particle sizes of 60 $\mu$m and 1 mm as well as for 100-250 $\mu$m-sized agglomerates of 1.5 $\mu$m-sized solid grains. We utilized g-levels between 0.7 m s$^{-2}$ and 18 m s$^{-2}$ and completed our measurements with experiments under normal gravity conditions. Based on previous experimental and theoretical literature and supported by our new experiments, we developed an analytical model to calculate the regolith stratification of celestial rocky and icy bodies and estimated the mechanical yields of the regolith under the weight of an astronaut and a spacecraft resting on these objects., Comment: 15 pages, 12 figures
Published: 2015
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44. Size-frequency distribution of boulders ≥7 m on comet 67P/Churyumov-Gerasimenko

Author: Pajola, Maurizio, primary, Vincent, Jean-Baptiste, additional, Güttler, Carsten, additional, Lee, Jui-Chi, additional, Bertini, Ivano, additional, Massironi, Matteo, additional, Simioni, Emanuele, additional, Marzari, Francesco, additional, Giacomini, Lorenza, additional, Lucchetti, Alice, additional, Barbieri, Cesare, additional, Cremonese, Gabriele, additional, Naletto, Giampiero, additional, Pommerol, Antoine, additional, El-Maarry, Mohamed R., additional, Besse, Sébastien, additional, Küppers, Michael, additional, La Forgia, Fiorangela, additional, Lazzarin, Monica, additional, Thomas, Nicholas, additional, Auger, Anne-Thérèse, additional, Sierks, Holger, additional, Lamy, Philippe, additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst U., additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Barucci, Maria A., additional, Bertaux, Jean-Loup, additional, Deppo, Vania Da, additional, Davidsson, Björn, additional, De Cecco, Mariolino, additional, Debei, Stefano, additional, Ferri, Francesca, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Groussin, Olivier, additional, Gutierrez, Pedro J., additional, Hviid, Stubbe F., additional, Ip, Wing-Huen, additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kramm, J.-Rainer, additional, Kürt, Ekkehard, additional, Lara, Luisa M., additional, Lin, Zhong-Yi, additional, Moreno, Jose J. Lopez, additional, Magrin, Sara, additional, Marchi, Simone, additional, Michalik, Harald, additional, Moissl, Richard, additional, Mottola, Stefano, additional, Oklay, Nilda, additional, Preusker, Frank, additional, Scholten, Frank, additional, and Tubiana, Cecilia, additional
Published: 2015
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45. The stratification of regolith on celestial objects

Author: Schräpler, Rainer, primary, Blum, Jürgen, additional, von Borstel, Ingo, additional, and Güttler, Carsten, additional
Published: 2015
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46. The nonmagnetic nucleus of comet 67P/Churyumov-Gerasimenko

Author: Auster, Hans-Ulrich, primary, Apathy, Istvan, additional, Berghofer, Gerhard, additional, Fornacon, Karl-Heinz, additional, Remizov, Anatoli, additional, Carr, Chris, additional, Güttler, Carsten, additional, Haerendel, Gerhard, additional, Heinisch, Philip, additional, Hercik, David, additional, Hilchenbach, Martin, additional, Kührt, Ekkehard, additional, Magnes, Werner, additional, Motschmann, Uwe, additional, Richter, Ingo, additional, Russell, Christopher T., additional, Przyklenk, Anita, additional, Schwingenschuh, Konrad, additional, Sierks, Holger, additional, and Glassmeier, Karl-Heinz, additional
Published: 2015
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47. The landing(s) of Philae and inferences about comet surface mechanical properties

Author: Biele, Jens, primary, Ulamec, Stephan, additional, Maibaum, Michael, additional, Roll, Reinhard, additional, Witte, Lars, additional, Jurado, Eric, additional, Muñoz, Pablo, additional, Arnold, Walter, additional, Auster, Hans-Ulrich, additional, Casas, Carlos, additional, Faber, Claudia, additional, Fantinati, Cinzia, additional, Finke, Felix, additional, Fischer, Hans-Herbert, additional, Geurts, Koen, additional, Güttler, Carsten, additional, Heinisch, Philip, additional, Herique, Alain, additional, Hviid, Stubbe, additional, Kargl, Günter, additional, Knapmeyer, Martin, additional, Knollenberg, Jörg, additional, Kofman, Wlodek, additional, Kömle, Norbert, additional, Kührt, Ekkehard, additional, Lommatsch, Valentina, additional, Mottola, Stefano, additional, Pardo de Santayana, Ramon, additional, Remetean, Emile, additional, Scholten, Frank, additional, Seidensticker, Klaus J., additional, Sierks, Holger, additional, and Spohn, Tilman, additional
Published: 2015
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48. The morphological diversity of comet 67P/Churyumov-Gerasimenko

Author: Thomas, Nicolas, primary, Sierks, Holger, additional, Barbieri, Cesare, additional, Lamy, Philippe L., additional, Rodrigo, Rafael, additional, Rickman, Hans, additional, Koschny, Detlef, additional, Keller, Horst Uwe, additional, Agarwal, Jessica, additional, A'Hearn, Michael F., additional, Angrilli, Francesco, additional, Auger, Anne-Therese, additional, Barucci, M. Antonella, additional, Bertaux, Jean-Loup, additional, Bertini, Ivano, additional, Besse, Sebastien, additional, Bodewits, Dennis, additional, Cremonese, Gabriele, additional, Da Deppo, Vania, additional, Davidsson, Björn, additional, De Cecco, Mariolino, additional, Debei, Stefano, additional, El-Maarry, Mohamed Ramy, additional, Ferri, Francesca, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Giacomini, Lorenza, additional, Groussin, Olivier, additional, Gutierrez, Pedro J., additional, Güttler, Carsten, additional, Hviid, Stubbe F., additional, Ip, Wing-Huen, additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kramm, J.-Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, La Forgia, Fiorangela, additional, Lara, Luisa M., additional, Lazzarin, Monica, additional, Moreno, Josè J. Lopez, additional, Magrin, Sara, additional, Marchi, Simone, additional, Marzari, Francesco, additional, Massironi, Matteo, additional, Michalik, Harald, additional, Moissl, Richard, additional, Mottola, Stefano, additional, Naletto, Giampiero, additional, Oklay, Nilda, additional, Pajola, Maurizio, additional, Pommerol, Antoine, additional, Preusker, Frank, additional, Sabau, Lola, additional, Scholten, Frank, additional, Snodgrass, Colin, additional, Tubiana, Cecilia, additional, Vincent, Jean-Baptiste, additional, and Wenzel, Klaus-Peter, additional
Published: 2015
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49. On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko

Author: Sierks, Holger, primary, Barbieri, Cesare, additional, Lamy, Philippe L., additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst Uwe, additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Angrilli, Francesco, additional, Auger, Anne-Therese, additional, Barucci, M. Antonella, additional, Bertaux, Jean-Loup, additional, Bertini, Ivano, additional, Besse, Sebastien, additional, Bodewits, Dennis, additional, Capanna, Claire, additional, Cremonese, Gabriele, additional, Da Deppo, Vania, additional, Davidsson, Björn, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Ferri, Francesca, additional, Fornasier, Sonia, additional, Fulle, Marco, additional, Gaskell, Robert, additional, Giacomini, Lorenza, additional, Groussin, Olivier, additional, Gutierrez-Marques, Pablo, additional, Gutiérrez, Pedro J., additional, Güttler, Carsten, additional, Hoekzema, Nick, additional, Hviid, Stubbe F., additional, Ip, Wing-Huen, additional, Jorda, Laurent, additional, Knollenberg, Jörg, additional, Kovacs, Gabor, additional, Kramm, J. Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, La Forgia, Fiorangela, additional, Lara, Luisa M., additional, Lazzarin, Monica, additional, Leyrat, Cédric, additional, Lopez Moreno, Josè J., additional, Magrin, Sara, additional, Marchi, Simone, additional, Marzari, Francesco, additional, Massironi, Matteo, additional, Michalik, Harald, additional, Moissl, Richard, additional, Mottola, Stefano, additional, Naletto, Giampiero, additional, Oklay, Nilda, additional, Pajola, Maurizio, additional, Pertile, Marco, additional, Preusker, Frank, additional, Sabau, Lola, additional, Scholten, Frank, additional, Snodgrass, Colin, additional, Thomas, Nicolas, additional, Tubiana, Cecilia, additional, Vincent, Jean-Baptiste, additional, Wenzel, Klaus-Peter, additional, Zaccariotto, Mirco, additional, and Pätzold, Martin, additional
Published: 2015
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50. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Author: Rotundi, Alessandra, primary, Sierks, Holger, additional, Della Corte, Vincenzo, additional, Fulle, Marco, additional, Gutierrez, Pedro J., additional, Lara, Luisa, additional, Barbieri, Cesare, additional, Lamy, Philippe L., additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst Uwe, additional, López-Moreno, José J., additional, Accolla, Mario, additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Altobelli, Nicolas, additional, Angrilli, Francesco, additional, Barucci, M. Antonietta, additional, Bertaux, Jean-Loup, additional, Bertini, Ivano, additional, Bodewits, Dennis, additional, Bussoletti, Ezio, additional, Colangeli, Luigi, additional, Cosi, Massimo, additional, Cremonese, Gabriele, additional, Crifo, Jean-Francois, additional, Da Deppo, Vania, additional, Davidsson, Björn, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Esposito, Francesca, additional, Ferrari, Marco, additional, Fornasier, Sonia, additional, Giovane, Frank, additional, Gustafson, Bo, additional, Green, Simon F., additional, Groussin, Olivier, additional, Grün, Eberhard, additional, Güttler, Carsten, additional, Herranz, Miguel L., additional, Hviid, Stubbe F., additional, Ip, Wing, additional, Ivanovski, Stavro, additional, Jerónimo, José M., additional, Jorda, Laurent, additional, Knollenberg, Joerg, additional, Kramm, Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, Lazzarin, Monica, additional, Leese, Mark R., additional, López-Jiménez, Antonio C., additional, Lucarelli, Francesca, additional, Lowry, Stephen C., additional, Marzari, Francesco, additional, Epifani, Elena Mazzotta, additional, McDonnell, J. Anthony M., additional, Mennella, Vito, additional, Michalik, Harald, additional, Molina, Antonio, additional, Morales, Rafael, additional, Moreno, Fernando, additional, Mottola, Stefano, additional, Naletto, Giampiero, additional, Oklay, Nilda, additional, Ortiz, José L., additional, Palomba, Ernesto, additional, Palumbo, Pasquale, additional, Perrin, Jean-Marie, additional, Rodríguez, Julio, additional, Sabau, Lola, additional, Snodgrass, Colin, additional, Sordini, Roberto, additional, Thomas, Nicolas, additional, Tubiana, Cecilia, additional, Vincent, Jean-Baptiste, additional, Weissman, Paul, additional, Wenzel, Klaus-Peter, additional, Zakharov, Vladimir, additional, and Zarnecki, John C., additional
Published: 2015
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