Cometary masses derived from non-gravitational forces
نویسندگان
چکیده
منابع مشابه
Cometary masses derived from non-gravitational forces
We compute masses and densities for ten periodic comets with known sizes: 1P/Halley, 2P/Encke, 6P/d’Arrest, 9P/Tempel 1, 10P/Tempel 2, 19P/Borrelly, 22P/Kopff, 46P/Wirtanen, 67P/Churyumov-Gerasimenko and 81P/Wild 2. The method follows the one developed by Rickman and colleagues (Rickman 1986, 1989; Rickman et al. 1987), which is based on the gas production curve and on the change in the orbital...
متن کاملGalaxy Halo Masses from Weak Gravitational Lensing
In this review, I discuss the use of galaxy-galaxy weak lensing measurements to study the masses of dark matter halos in which galaxies reside. After summarizing how weak gravitational lensing measurements can be interpreted in terms of halo mass, I review measurements that were used to derive the relationship between optical galaxy mass tracers, such as stellar mass or luminosity, and dark mat...
متن کاملCometary Orbit Determination and Nongravitational Forces
The accuracies of the orbits and ephemerides for active comets are most often limited by imperfectly modeled rocket-like accelerations experienced by active comets as a result of the outgassing cometary nucleus near perihelion. The standard nongravitational acceleration model proposed by Marsden et al. (1973) has been updated by allowing the nucleus outgassing to act asymmetrically with respect...
متن کاملHow Gravitational Forces arise from Curvature
In the second set of supplementary notes — Gravity, Metrics and Coordinates — we introduced the idea that matter induces spacetime curvature, and we argued that this curvature is fully described by the metric. In the case of a static, spherically symmetric mass distribution, we presented the Einstein Field Equations whose solution gives the metric and therefore the geometry of spacetime. The cu...
متن کاملGravitational forces from Bose-Einstein condensation
The basic idea that gravity can be a long-wavelength effect induced by the peculiar ground state of an underlying quantum field theory leads to consider the implications of spontaneous symmetry breaking through an elementary scalar field. We point out that Bose-Einstein condensation implies the existence of long-range order and of a gap-less mode of the (singlet) Higgs-field. This gives rise to...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2009
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2008.14183.x