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  1. Book ; Online: Validation of the IPSL Venus GCM Thermal Structure with Venus Express Data

    Scarica, Pietro / Garate-Lopez, Itziar / Lebonnois, Sebastien / Piccioni, Giuseppe / Grassi, Davide / Migliorini, Alessandra / Tellmann, Silvia

    2024  

    Abstract: General circulation models (GCMs) are valuable instruments to understand the most peculiar features in the atmospheres of planets and the mechanisms behind their dynamics. Venus makes no exception and it has been extensively studied thanks to GCMs. Here ... ...

    Abstract General circulation models (GCMs) are valuable instruments to understand the most peculiar features in the atmospheres of planets and the mechanisms behind their dynamics. Venus makes no exception and it has been extensively studied thanks to GCMs. Here we validate the current version of the Institut Pierre Simon Laplace (IPSL) Venus GCM, by means of a comparison between the modelled temperature field and that obtained from data by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) and the Venus Express Radio Science Experiment (VeRa) onboard Venus Express. The modelled thermal structure displays an overall good agreement with data, and the cold collar is successfully reproduced at latitudes higher than +/-55\deg, with an extent and a behavior close to the observed ones. Thermal tides developing in the model appear to be consistent in phase and amplitude with data: diurnal tide dominates at altitudes above 10^2 Pa pressure level and at high-latitudes, while semidiurnal tide dominates between 10^2 and 10^4 Pa, from low to mid-latitudes. The main difference revealed by our analysis is located poleward of 50\deg, where the model is affected by a second temperature inversion arising at 10^3 Pa. This second inversion, possibly related to the adopted aerosols distribution, is not observed in data.

    Comment: 22 pages, 9 figures
    Keywords Astrophysics - Earth and Planetary Astrophysics
    Subject code 551
    Publishing date 2024-02-01
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Cometary Comae-Surface Links: The Physics of Gas and Dust from the Surface to a Spacecraft.

    Marschall, Raphael / Skorov, Yuri / Zakharov, Vladimir / Rezac, Ladislav / Gerig, Selina-Barbara / Christou, Chariton / Dadzie, S Kokou / Migliorini, Alessandra / Rinaldi, Giovanna / Agarwal, Jessica / Vincent, Jean-Baptiste / Kappel, David

    Space science reviews

    2020  Volume 216, Issue 8, Page(s) 130

    Abstract: A comet is a highly dynamic object, undergoing a permanent state of change. These changes have to be carefully classified and considered according to their intrinsic temporal and spatial scales. The Rosetta mission has, through its contiguous in-situ and ...

    Abstract A comet is a highly dynamic object, undergoing a permanent state of change. These changes have to be carefully classified and considered according to their intrinsic temporal and spatial scales. The Rosetta mission has, through its contiguous in-situ and remote sensing coverage of comet 67P/Churyumov-Gerasimenko (hereafter 67P) over the time span of August 2014 to September 2016, monitored the emergence, culmination, and winding down of the gas and dust comae. This provided an unprecedented data set and has spurred a large effort to connect in-situ and remote sensing measurements to the surface. In this review, we address our current understanding of cometary activity and the challenges involved when linking comae data to the surface. We give the current state of research by describing what we know about the physical processes involved from the surface to a few tens of kilometres above it with respect to the gas and dust emission from cometary nuclei. Further, we describe how complex multidimensional cometary gas and dust models have developed from the Halley encounter of 1986 to today. This includes the study of inhomogeneous outgassing and determination of the gas and dust production rates. Additionally, the different approaches used and results obtained to link coma data to the surface will be discussed. We discuss forward and inversion models and we describe the limitations of the respective approaches. The current literature suggests that there does not seem to be a single uniform process behind cometary activity. Rather, activity seems to be the consequence of a variety of erosion processes, including the sublimation of both water ice and more volatile material, but possibly also more exotic processes such as fracture and cliff erosion under thermal and mechanical stress, sub-surface heat storage, and a complex interplay of these processes. Seasons and the nucleus shape are key factors for the distribution and temporal evolution of activity and imply that the heliocentric evolution of activity can be highly individual for every comet, and generalisations can be misleading.
    Language English
    Publishing date 2020-11-06
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 2017804-9
    ISSN 1572-9672 ; 0038-6308
    ISSN (online) 1572-9672
    ISSN 0038-6308
    DOI 10.1007/s11214-020-00744-0
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  3. Article ; Online: Ejecta from the DART-produced active asteroid Dimorphos.

    Li, Jian-Yang / Hirabayashi, Masatoshi / Farnham, Tony L / Sunshine, Jessica M / Knight, Matthew M / Tancredi, Gonzalo / Moreno, Fernando / Murphy, Brian / Opitom, Cyrielle / Chesley, Steve / Scheeres, Daniel J / Thomas, Cristina A / Fahnestock, Eugene G / Cheng, Andrew F / Dressel, Linda / Ernst, Carolyn M / Ferrari, Fabio / Fitzsimmons, Alan / Ieva, Simone /
    Ivanovski, Stavro L / Kareta, Theodore / Kolokolova, Ludmilla / Lister, Tim / Raducan, Sabina D / Rivkin, Andrew S / Rossi, Alessandro / Soldini, Stefania / Stickle, Angela M / Vick, Alison / Vincent, Jean-Baptiste / Weaver, Harold A / Bagnulo, Stefano / Bannister, Michele T / Cambioni, Saverio / Campo Bagatin, Adriano / Chabot, Nancy L / Cremonese, Gabriele / Daly, R Terik / Dotto, Elisabetta / Glenar, David A / Granvik, Mikael / Hasselmann, Pedro H / Herreros, Isabel / Jacobson, Seth / Jutzi, Martin / Kohout, Tomas / La Forgia, Fiorangela / Lazzarin, Monica / Lin, Zhong-Yi / Lolachi, Ramin / Lucchetti, Alice / Makadia, Rahil / Mazzotta Epifani, Elena / Michel, Patrick / Migliorini, Alessandra / Moskovitz, Nicholas A / Ormö, Jens / Pajola, Maurizio / Sánchez, Paul / Schwartz, Stephen R / Snodgrass, Colin / Steckloff, Jordan / Stubbs, Timothy J / Trigo-Rodríguez, Josep M

    Nature

    2023  Volume 616, Issue 7957, Page(s) 452–456

    Abstract: Some active asteroids have been proposed to be formed as a result of impact ... ...

    Abstract Some active asteroids have been proposed to be formed as a result of impact events
    Language English
    Publishing date 2023-03-01
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-023-05811-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  4. Book ; Online: Ejecta Evolution Following a Planned Impact into an Asteroid

    Kareta, Theodore / Thomas, Cristina / Li, Jian-Yang / Knight, Matthew M. / Moskovitz, Nicholas / Rozek, Agata / Bannister, Michele T. / Ieva, Simone / Snodgrass, Colin / Pravec, Petr / Ryan, Eileen V. / Ryan, William H. / Fahnestock, Eugene G. / Rivkin, Andrew S. / Chabot, Nancy / Fitzsimmons, Alan / Osip, David / Lister, Tim / Sarid, Gal /
    Hirabayashi, Masatoshi / Farnham, Tony / Tancredi, Gonzalo / Michel, Patrick / Wainscoat, Richard / Weryk, Rob / Burrati, Bonnie / Pittichova, Jana / Ridden-Harper, Ryan / Tan, Nicole J. / Tristram, Paul / Brown, Tyler / Bonavita, Mariangela / Burgdorf, Martin / Khalouei, Elahe / Longa, Penelope / Rabus, Markus / Sajadian, Sedighe / Jorgensen, Uffe Graae / Dominik, Martin / Kikwaya, Jean-Baptiste / Epifani, Elena Mazzotta / Dotto, Elisabetta / Deshapriya, J. D. Prasanna / Hasselmann, Pedro H. / Dall'Ora, Massimo / Abe, Lyu / Guillot, Tristan / Mekarnia, Djamel / Agabi, Abdelkrim / Bendjoya, Philippe / Suarez, Olga / Triaud, Amaury / Gasparetto, Thomas / Gunther, Maximillian N. / Kueppers, Michael / Merin, Bruno / Chatelain, Joseph / Gomez, Edward / Usher, Helen / Stoddard-Jones, Cai / Bartnik, Matthew / Bellaver, Michael / Chetan, Brenna / Dugan, Emma / Fallon, Tori / Fedewa, Jeremy / Gerhard, Caitlyn / Jacobson, Seth A. / Painter, Shane / Peterson, David-Michael / Rodriguez, Joseph E. / Smith, Cody / Sokolovsky, Kirill V. / Sullivan, Hannah / Townley, Kate / Watson, Sarah / Webb, Levi / Trigo-Rodrıguez, Josep M. / Llenas, Josep M. / Perez-Garcıa, Ignacio / Castro-Tirado, A. J. / Vincent, Jean-Baptiste / Migliorini, Alessandra / Lazzarin, Monica / La Forgia, Fiorangela / Ferrari, Fabio / Polakis, Tom / Skiff, Brian

    The First Five Weeks

    2023  

    Abstract: The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results from twelve Earth-based facilities involved in a world-wide campaign to ... ...

    Abstract The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results from twelve Earth-based facilities involved in a world-wide campaign to monitor the brightness and morphology of the ejecta in the first 35 days after impact. After an initial brightening of ~1.4 magnitudes, we find consistent dimming rates of 0.11-0.12 magnitudes/day in the first week, and 0.08-0.09 magnitudes/day over the entire study period. The system returned to its pre-impact brightness 24.3-25.3 days after impact through the primary ejecta tail remained. The dimming paused briefly eight days after impact, near in time to the appearance of the second tail. This was likely due to a secondary release of material after re-impact of a boulder released in the initial impact, through movement of the primary ejecta through the aperture likely played a role.

    Comment: 16 pages, 5 Figures, accepted in the Astrophysical Journal Letters (ApJL) on October 16, 2023
    Keywords Astrophysics - Earth and Planetary Astrophysics
    Subject code 306
    Publishing date 2023-10-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: The Comet Interceptor Mission.

    Jones, Geraint H / Snodgrass, Colin / Tubiana, Cecilia / Küppers, Michael / Kawakita, Hideyo / Lara, Luisa M / Agarwal, Jessica / André, Nicolas / Attree, Nicholas / Auster, Uli / Bagnulo, Stefano / Bannister, Michele / Beth, Arnaud / Bowles, Neil / Coates, Andrew / Colangeli, Luigi / Corral van Damme, Carlos / Da Deppo, Vania / De Keyser, Johan /
    Della Corte, Vincenzo / Edberg, Niklas / El-Maarry, Mohamed Ramy / Faggi, Sara / Fulle, Marco / Funase, Ryu / Galand, Marina / Goetz, Charlotte / Groussin, Olivier / Guilbert-Lepoutre, Aurélie / Henri, Pierre / Kasahara, Satoshi / Kereszturi, Akos / Kidger, Mark / Knight, Matthew / Kokotanekova, Rosita / Kolmasova, Ivana / Kossacki, Konrad / Kührt, Ekkehard / Kwon, Yuna / La Forgia, Fiorangela / Levasseur-Regourd, Anny-Chantal / Lippi, Manuela / Longobardo, Andrea / Marschall, Raphael / Morawski, Marek / Muñoz, Olga / Näsilä, Antti / Nilsson, Hans / Opitom, Cyrielle / Pajusalu, Mihkel / Pommerol, Antoine / Prech, Lubomir / Rando, Nicola / Ratti, Francesco / Rothkaehl, Hanna / Rotundi, Alessandra / Rubin, Martin / Sakatani, Naoya / Sánchez, Joan Pau / Simon Wedlund, Cyril / Stankov, Anamarija / Thomas, Nicolas / Toth, Imre / Villanueva, Geronimo / Vincent, Jean-Baptiste / Volwerk, Martin / Wurz, Peter / Wielders, Arno / Yoshioka, Kazuo / Aleksiejuk, Konrad / Alvarez, Fernando / Amoros, Carine / Aslam, Shahid / Atamaniuk, Barbara / Baran, Jędrzej / Barciński, Tomasz / Beck, Thomas / Behnke, Thomas / Berglund, Martin / Bertini, Ivano / Bieda, Marcin / Binczyk, Piotr / Busch, Martin-Diego / Cacovean, Andrei / Capria, Maria Teresa / Carr, Chris / Castro Marín, José María / Ceriotti, Matteo / Chioetto, Paolo / Chuchra-Konrad, Agata / Cocola, Lorenzo / Colin, Fabrice / Crews, Chiaki / Cripps, Victoria / Cupido, Emanuele / Dassatti, Alberto / Davidsson, Björn J R / De Roche, Thierry / Deca, Jan / Del Togno, Simone / Dhooghe, Frederik / Donaldson Hanna, Kerri / Eriksson, Anders / Fedorov, Andrey / Fernández-Valenzuela, Estela / Ferretti, Stefano / Floriot, Johan / Frassetto, Fabio / Fredriksson, Jesper / Garnier, Philippe / Gaweł, Dorota / Génot, Vincent / Gerber, Thomas / Glassmeier, Karl-Heinz / Granvik, Mikael / Grison, Benjamin / Gunell, Herbert / Hachemi, Tedjani / Hagen, Christian / Hajra, Rajkumar / Harada, Yuki / Hasiba, Johann / Haslebacher, Nico / Herranz De La Revilla, Miguel Luis / Hestroffer, Daniel / Hewagama, Tilak / Holt, Carrie / Hviid, Stubbe / Iakubivskyi, Iaroslav / Inno, Laura / Irwin, Patrick / Ivanovski, Stavro / Jansky, Jiri / Jernej, Irmgard / Jeszenszky, Harald / Jimenéz, Jaime / Jorda, Laurent / Kama, Mihkel / Kameda, Shingo / Kelley, Michael S P / Klepacki, Kamil / Kohout, Tomáš / Kojima, Hirotsugu / Kowalski, Tomasz / Kuwabara, Masaki / Ladno, Michal / Laky, Gunter / Lammer, Helmut / Lan, Radek / Lavraud, Benoit / Lazzarin, Monica / Le Duff, Olivier / Lee, Qiu-Mei / Lesniak, Cezary / Lewis, Zoe / Lin, Zhong-Yi / Lister, Tim / Lowry, Stephen / Magnes, Werner / Markkanen, Johannes / Martinez Navajas, Ignacio / Martins, Zita / Matsuoka, Ayako / Matyjasiak, Barbara / Mazelle, Christian / Mazzotta Epifani, Elena / Meier, Mirko / Michaelis, Harald / Micheli, Marco / Migliorini, Alessandra / Millet, Aude-Lyse / Moreno, Fernando / Mottola, Stefano / Moutounaick, Bruno / Muinonen, Karri / Müller, Daniel R / Murakami, Go / Murata, Naofumi / Myszka, Kamil / Nakajima, Shintaro / Nemeth, Zoltan / Nikolajev, Artiom / Nordera, Simone / Ohlsson, Dan / Olesk, Aire / Ottacher, Harald / Ozaki, Naoya / Oziol, Christophe / Patel, Manish / Savio Paul, Aditya / Penttilä, Antti / Pernechele, Claudio / Peterson, Joakim / Petraglio, Enrico / Piccirillo, Alice Maria / Plaschke, Ferdinand / Polak, Szymon / Postberg, Frank / Proosa, Herman / Protopapa, Silvia / Puccio, Walter / Ranvier, Sylvain / Raymond, Sean / Richter, Ingo / Rieder, Martin / Rigamonti, Roberto / Ruiz Rodriguez, Irene / Santolik, Ondrej / Sasaki, Takahiro / Schrödter, Rolf / Shirley, Katherine / Slavinskis, Andris / Sodor, Balint / Soucek, Jan / Stephenson, Peter / Stöckli, Linus / Szewczyk, Paweł / Troznai, Gabor / Uhlir, Ludek / Usami, Naoto / Valavanoglou, Aris / Vaverka, Jakub / Wang, Wei / Wang, Xiao-Dong / Wattieaux, Gaëtan / Wieser, Martin / Wolf, Sebastian / Yano, Hajime / Yoshikawa, Ichiro / Zakharov, Vladimir / Zawistowski, Tomasz / Zuppella, Paola / Rinaldi, Giovanna / Ji, Hantao

    Space science reviews

    2024  Volume 220, Issue 1, Page(s) 9

    Abstract: Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating ...

    Abstract Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating at another star. The objectives of the mission are to address the following questions: What are the surface composition, shape, morphology, and structure of the target object? What is the composition of the gas and dust in the coma, its connection to the nucleus, and the nature of its interaction with the solar wind? The mission was proposed to the European Space Agency in 2018, and formally adopted by the agency in June 2022, for launch in 2029 together with the Ariel mission. Comet Interceptor will take advantage of the opportunity presented by ESA's F-Class call for fast, flexible, low-cost missions to which it was proposed. The call required a launch to a halo orbit around the Sun-Earth L2 point. The mission can take advantage of this placement to wait for the discovery of a suitable comet reachable with its minimum
    Language English
    Publishing date 2024-01-24
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 2017804-9
    ISSN 1572-9672 ; 0038-6308
    ISSN (online) 1572-9672
    ISSN 0038-6308
    DOI 10.1007/s11214-023-01035-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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