Seminars at MPS

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MPS Seminar: Did Neanderthal meet Modern Human? The Sun and Radiocarbon will tell (S. Talamo)

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Planetary Group Seminar: Laboratory experiments on comet formation and activity (B. Gundlach)

This presentation will be providing an overview on laboratory experiments conducted at the TU Braunschweig with the aim to study comet activity and planet formation. First, an overview on recent competing comet formation scenarios is given, followed by with a discussion on how laboratory experiments can help to understand the different formation processes better. The second half of this talk will be focusing on the question of how laboratory works can be utilized to help interpreting observational data, for example gathered by the Rosetta spacecraft, to learn about comet activity. This presentation will be ending with an outlook on planned experiments and with an invitation to discuss the importance of future laboratory experiments with the audience. [more]

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MPS Seminar: Large eddy simulations of compressible MHD turbulence in space plasma (A. Petrosyan)

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MPS Seminar: Computational wave propagation (H. Barucq)

  • Date: Mar 21, 2017
  • Time: 15:00 - 16:00
  • Speaker: Hélène Barucq
  • Magique-3D, INRIA Bordeaux Sud-Ouest, Université de Pau et des Pays de l’odour, France
  • Location: MPS
  • Room: Auditorium
  • Host: Aaron Birch

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Planetary Group Seminar: "Acceleration of cometary dust near the nucleus with models and MIRO" (C. Jarchow, L. Rezac, Y. Skorov)

Cometary dust activity is usually explained by a gas drag force which lifts micrometer-sized dust particles from the nucleus' surface against the weak nucleus gravity. However, taking into account the additional cohesion forces among the dust grains then this idea becomes questionable. We present the status of a thermophysical model of dust activity and compare it with observations of the Rosetta mission to comet 67P/Churyumov-Gerasimenko. [more]

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Planetary Group Seminar: Aerosol properties in the upper clouds of Venus from glory observations by the Venus Monitoring Camera - Venus Express mission (O. Shalygina)

From the angular positions of the glory features observed on the upper cloud deck of Venus in three VMC channels (at 0.365, 0.513, and 0.965 mkm), the dominating sizes of cloud particles and their refractive index have been retrieved, and their spatial (in latitude) and temporal (in local time) variations have been analyzed. For this, the phase profiles of brightness were compared to the singe-scattering phase functions of particles of different sizes. [more]

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Planetary Group Seminar: "The MASCOT lander onboard the Hayabusa2 mission" (T.M. Ho)

MASCOT is a small asteroid lander launched on December 3rd, 2014, aboard the Japanese Hayabusa2 asteroid sample-return mission towards the 980 m diameter C-type near-Earth asteroid (NEA) 162173 Ryugu. The lander was jointly developed by the German Aerospace Centre (DLR) and the Centre National d'Etudes Spatiales (CNES). It is equipped with a sensor suite consisting of four fully-fledged instruments: a spectrometer (MicrOmega, IAS Paris), a camera (CAM, DLR Berlin), a radiometer (MARA, DLR Berlin) and a magnetometer (MAG, TU Braunschweig) to investigate Ryugu's surface structure, mineralogical composition, physical properties, thermal behavior and magnetic effects. The MASCOT lander has a total weight of only ~10kg and a size of 30 cm x 30 cm x 20 cm, comparable to a shoebox. Next to the 4 science payloads it accommodates all subsystems to guarantee the survival during the four years cold cruise phase and an on-surface operation and data uplink of up to 2 asteroid days. Upon arrival in Summer 2018 at the target, Hayabusa2 will map NEA Ryugu for several months before it will release MASCOT at an altitude of approx. 100m to free fall on the asteroid's surface. Since MASCOT has no attitude control, it will reach the surface and undergo a certain bouncing phase before it will finally come to rest. A mobility system allows the lander to upright into the correct measurement attitude and to relocate across the asteroids surface after the completion of its first science cycle. The system design, science instruments, and operational concept of MASCOT will be presented, with sidenotes on the development of the mission and its integration with Hayabusa2. [more]

 
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