منابع مشابه
Halos and ice crystals
Observing cirrus halos to constrain in-situ measurements of ice crystal size T. J. Garrett, M. B. Kimball, G. G. Mace, and D. G. Baumgardner Department of Meteorology, University of Utah, Salt Lake City, UT, 84112-0110, USA Universidad Nacional Autonoma de Mexico, Mexico City, Mexico Received: 21 December 2006 – Accepted: 16 January 2007 – Published: 26 January 2007 Correspondence to: T. Garret...
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We use N-body simulations to study properties of dwarf halos with virial masses in the range 10 − 10hM⊙. Unlike recent reported results, we find that the density profiles of relaxed dwarf halos are well fitted by the NFW profile and do not have cores. We estimate the distribution of concentrations for halos in mass range that covers six orders of magnitude from 10 hM⊙ to 10 13 hM⊙, and find tha...
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We resolve the inner region of a massive cluster forming in a cosmological ΛCDM simulation with a mass resolution of 2 × 106M⊙ and before z=4.4 even 3 × 10 5M⊙. This is a billion times less than the clusters final virial mass and a substantial increase over current ΛCDM simulations. We achieve this resolution using a new multi-mass refinement procedure and are now able to probe a dark matter ha...
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Geometric-optics singularities in the intensity profiles of refraction halos formed by randomly oriented ice crystals are softened by diffraction and decorated with fine supernumerary fringes. If the crystals have a fixed symmetry axis (as in parhelia), the geometric singularity is a square-root divergence, as in the rainbow. However, the universal curve that describes diffraction is different ...
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— In the framework of the search of dark matter in galactic halos in form of massive compact halo object (MACHOs), we discuss the status of microlensing observations towards the Magellanic Clouds and the Andromeda galaxy, M31. The detection of a few microlensing events has been reported, but an unambiguous conclusion on the halo content in form on MACHOs has not been reached yet. A more detaile...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1927
ISSN: 0007-1161
DOI: 10.1136/bjo.11.7.342