منابع مشابه
Gravitational Imaging of CDM Substructure
We propose the novel method of “gravitational imaging” to detect and quantify luminous and dark-matter substructure in gravitational-lens galaxies. The method utilizes highly-magnified Einstein rings and arcs as sensitive probes of small perturbations in the lens potential (due to the presence of mass substructure), reconstructing the gravitational lens potential non-parametrically. Numerical s...
متن کاملPredicting Substructure in CDM Haloes
Observations of multiple-image gravitational lens systems suggest that the projected mass distributions of galaxy haloes may contain substantial inhomogeneities. The fraction of the halo mass in dense substructure is still highly uncertain, but could be as large as a few percent. While halo substructure is seen in numerical simulations of CDM haloes, little of this substructure survives in the ...
متن کاملGravitational-Mass Imaging of CDM Substructure
I propose the novel method of “gravitational-mass imaging” to detect and quantify luminous and dark-matter substructure in gravitational-lens galaxies. The method utilizes highly-magnified Einstein rings and arcs as sensitive probes of small perturbations in the lens potential (due to the presence of mass substructure), reconstructing the gravitational lens potential non-parametrically. Simulat...
متن کاملUncovering CDM halo substructure with tidal streams
Models for the formation and growth of structure in a cold dark matter dominated universe predict that galaxy halos should contain significant substructure. Studies of the Milky Way, however, have yet to identify the expected few hundred sub-halos with masses greater than about 10 M⊙. Here we propose a test for the presence of sub-halos in the halos of galaxies. We show that the structure of th...
متن کامل3d Mapping of Cdm Substructure at Submillimeter Wavelengths
The Cold Dark Matter (CDM) structure formation model predicts that about 5-10 percent of a typical galactic halo mass ∼ 10M⊙is in substructures with a mass . 10M⊙. To directly detect such substructures, we propose to observe dust continuum emission from a strongly lensed QSO-host galaxy using a large submillimeter interferometer array with a high angular resolution ∼ 0.01arcsec such as the plan...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)02094-2