منابع مشابه
Roche Lobe Sizes in Deep-MOND Gravity
MOdified Newtonian Dynamics (MOND) is evolving from an empirical to a decent theory respecting fundamental physics after Bekenstein (2004) showed that lensing and Hubble expansion can be modeled rigourously in a Modified Relativity. The degeneracy of MOND with Dark Matter can be broken if we examine the non-linear MONDian Poisson’s equation in detail. Here we study the effect of tides for a bin...
متن کاملRoche Lobe Shapes in MOND-like Modified Gravity
We consider how to break the near degeneracy between dark matter and baryonic MOdified Newtonian Dynamics (MOND). We show that the Roche Lobes of a two-body baryonic system (e.g., a globular cluster orbiting a host galaxy) are sensitive to modifications of the law of gravity. We generalise the analytical results obtained in the deep-MOND limit by Zhao (2005, astro-ph/0511713), consider in the f...
متن کاملRoche Lobe Shapes for testing MOND-like Modified Gravities
Dark Matter (DM) theories and mass-tracing-light theories like MOND are by construction nearly degenerate on galactic scales, but not when it comes to the predicted shapes of Roche Lobes of a two-body system (e.g., a globular cluster orbiting a host galaxy). We show that the flattening of the Roche lobe is sensitive to the function μ(g) in modification of the law of gravity. We generalise the a...
متن کاملModified gravity, Dark Energy and MOND
We propose a class of actions for the spacetime metric that introduce corrections to the Einstein-Hilbert Lagrangian depending on the logarithm of some curvature scalars. We show that for some choices of these invariants the models are ghost free and modify Newtonian gravity below a characteristic acceleration scale given by a0 = cμ, where c is the speed of light and μ is a parameter of the mod...
متن کاملRoche Lobe Overflow from Dwarf Stellar Systems
We examine the evolution of residual gas within tidally-limited dwarf galaxies and globular clusters. In systems where the gas sound speed exceeds about 10% of the central velocity dispersion, hydrostatic equilibrium causes the gas to have significant density at the tidal radius. In contrast to the stellar component, gas particles relax rapidly in response to mass loss. Gas lost through the Lag...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200500200