Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Kuehrt, Ekkehard"'
Autor:
Neumann, Wladimir, Grott, Matthias, Trieloff, Mario, Jaumann, Ralf, Biele, Jens, Hamm, Maximilian, Kührt, Ekkehard
Publikováno v:
Icarus 358, 114166 (2021)
Observations of C-type NEAs and lab investigations of carbonaceous chondritic (CC) meteorites provide strong evidence for a high porosity of C-type asteroids. Boulder microporosity values derived from in-situ measurements at the surface of the rubble
Externí odkaz:
http://arxiv.org/abs/2302.04294
Autor:
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
Publikováno v:
Mon. Not. R. Astron. Soc. 516, 6009-6040 (2022)
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 elsewh
Externí odkaz:
http://arxiv.org/abs/2210.08134
Autor:
Borysenko, Serhii, Baransky, Alexander, Kuehrt, Ekkehard, Hellmich, Stephan, Mottola, Stefano, Meech, Karen
Dynamically different groups of comets and active asteroids with orbits at 2 - 5 a. u. show dust activity in varying degrees and forms. Photometric study and comparison of physical parameters can help to classify mechanisms and nature of the activity
Externí odkaz:
http://arxiv.org/abs/2011.13247
Autor:
Chu, Laurie E. U., Meech, Karen J., Farnham, Tony L., Kührt, Ekkehard, Mottola, Stefano, Keane, Jacqueline V., Hellmich, Stephan, Hainaut, Olivier R., Kleyna, Jan T.
Comet 49P/Arend-Rigaux is a well known low-activity Jupiter Family comet. Despite the low activity, we have witnessed outgassing activity in 1992, 2004, and 2012. In 2012 a broad tail-like feature (PA$\sim270^\circ, \sim2.3\times10^5$ km) and a narro
Externí odkaz:
http://arxiv.org/abs/1912.02194
Publikováno v:
A&A 630, A148 (2019)
Aims. We investigate the influence of the Yarkovsky force on the long-term orbital evolution of Jupiter Trojan asteroids. Methods. Clones of the observed population with different sizes and different thermal properties were numerically integrated for
Externí odkaz:
http://arxiv.org/abs/1909.08584
Autor:
Vincent, Jean-Baptiste, Farnham, Tony, Kührt, Ekkehard, Skorov, Yuri, Marschall, Raphael, Oklay, Nilda, El-Maarry, Ramy, Keller, Horst Uwe
Comets are made of volatile and refractory material and naturally experience various degrees of sublimation as they orbit around the Sun. This gas release, accompanied by dust, represents what is traditionally described as activity. Although the basi
Externí odkaz:
http://arxiv.org/abs/1904.05607
Autor:
Attree, Nicholas, Jorda, Laurent, Groussin, Olivier, Mottola, Stefano, Thomas, Nick, Brouet, Yann, Kührt, Ekkehard, Knapmeyer, Martin, Preusker, Frank, Scholten, Frank, Knollenberg, Jorg, Hviid, Stubbe, Hartogh, Paul, Rodrigo, Rafael
Publikováno v:
A&A 630, A18 (2019)
Aims. We use four observational data sets, mainly from the Rosetta mission, to constrain the activity pattern of the nucleus of comet 67P/Churyumov-Gerasimenko. Methods. We develop a numerical model that computes the production rate and non-gravitati
Externí odkaz:
http://arxiv.org/abs/1901.02806
Autor:
Kramer, Tobias, Laeuter, Matthias, Hviid, Stubbe, Jorda, Laurent, Keller, Horst Uwe, Kührt, Ekkehard
Publikováno v:
A&A 630, A3 (2019)
(Context) The change of the rotation period and the orientation of the rotation axis of comet 67P/Churyumov-Gerasimenko (67P/C-G) is deducible from images taken by the scientific imaging instruments on-board the Rosetta mission with high precision. N
Externí odkaz:
http://arxiv.org/abs/1812.01490
Autor:
Wada, Koji, Grott, Matthias, Michel, Patrick, Walsh, Kevin J., Barucci, Antonella M., Biele, Jens, Blum, Jürgen, Ernst, Carolyn M., Grundmann, Jan T., Gundlach, Bastian, Hagermann, Axel, Hamm, Maximilian, Jutzi, Martin, Kim, Myung-Jin, Kührt, Ekkehard, Corre, Lucille Le, Libourel, Guy, Lichtenheldt, Roy, Maturilli, Alessandro, Messenger, Scott R., Michikami, Tatsuhiro, Miyamoto, Hideaki, Mottola, Stefano, Nakamura, Akiko M., Müller, Thomas, Nittler, Larry R., Ogawa, Kazunori, Okada, Tatsuaki, Palomba, Ernesto, Sakatani, Naoya, Schröder, Stefan, Senshu, Hiroki, Takir, Driss, Zolensky, Michael E.
Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA). Ground-based observations indicate that Ryugu is a C-type near-Earth asteroid with a diamet
Externí odkaz:
http://arxiv.org/abs/1804.03734
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