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Modeled Interaction of Comet 67P/Churyumov-Gerasimenko with the Solar Wind Inside 2 AU
Ip, W. -H.; Gombosi, T. I.; Rubin, M. +4 more
Periodic comets move around the Sun on elliptical orbits. As such comet 67P/Churyumov-Gerasimenko (hereafter 67P) spends a portion of time in the inner solar system where it is exposed to increased solar insolation. Therefore given the change in heliocentric distance, in case of 67P from aphelion at 5.68 AU to perihelion at ~1.24 AU, the comet's a…
Interaction of Low-Activity Comets with the Solar Wind
Baranov, Vladimir B.; Alexashov, Dmitry B.; Lebedev, Michail G.
The solar wind flow around a cometary atmosphere is calculated using the three-dimensional magnetohydrodynamic model developed by the authors. Emphasis is placed on the case of low-activity comets in which some special features, both quantitative and qualitative, are inherent. The behavior of the flowfield and the magnetic field disturbed by the c…
Improved Views of the Moon in the Early Twenty First Century: A Review
Yang, Hongwei; Zhao, Wenjin
The twenty first century was an exciting epoch in planetary exploration, when a large number of lunar scientific achievements were accomplished. New missions in the first decade of the twenty first century have herald a new and exciting phase in lunar exploration, including LRO, LCROSS, the dual GRAIL orbiters, Kaguya, Chandrayaan 1, and the Chang…
Circular Polarization Characteristics of South Polar Lunar Craters using Chandrayaan-1 Mini-SAR and LRO Mini-RF
Calla, Om Prakash Narayan; Mathur, Shubhra; Jangid, Monika +1 more
The paper presents a case study of inconsistent behaviour of Chandrayaan-1 Mini-SAR and LRO Mini-RF data over south polar lunar craters. The paper includes analysis of Stokes parameters and characterization of received time-varying electromagnetic fields over the south pole lunar craters. For the study, Chandrayaan-1 Mini-SAR and LRO Mini-RF data …