Plan β: core or cusp?
نویسندگان
چکیده
منابع مشابه
Cusp-core problem and strong gravitational lensing
Cosmological numerical simulations of galaxy formation have led to the cuspy density profile of pure cold dark matter halo toward the center, which is in sharp contradiction with the observations of the rotation curves of cold dark matter-dominated dwarf and low surface brightness disk galaxies, the latter tends to favor mass profiles with a flat central core. Many efforts have been devoted to ...
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The dark matter dominated Fornax dwarf spheroidal has five globular clusters orbiting at several hundred parsecs from its centre. In a cuspy CDM halo the globulars would sink to the centre from their current positions within half a billion years. We show that this timing problem is even more severe when interactions between the globular clusters are taken into account. Even when two globulars s...
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The Core Plan Representation (CPR) [Pease and Carrico, 1996] is an effort to develop a plan representation which supports the representation needs of many different planning systems. It is being developed for the DARPA Joint Task Force Advanced Technology Demonstration (JTF ATD) [Hayes-Roth, 1995], [Hayes-Roth Erman, 1994], [Carrico, 1996]. The goal of this effort is to leverage common function...
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The presence of a dark matter core in the central kiloparsec of many dwarf galaxies has been a long-standing problem in galaxy formation theories based on the standard cold dark matter paradigm. Recent simulations, based on smooth particle hydrodynamics and rather strong feedback recipes, have shown that it was indeed possible to form extended dark matter cores using baryonic processes related ...
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We study the cusp/core problem using a secondary infall model (SIM) that takes into account the effect of ordered and random angular momentum, dynamical friction and baryons adiabatic contraction. The model is applied to structures on galactic scales (normal and dwarfs spiral galaxies) and on clusters of galaxies scales. Our analysis suggest that angular momentum and dynamical friction are able...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stu383