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- W2034804487 startingPage "1173" @default.
- W2034804487 abstract "Cosmological numerical simulations of galaxy formation have led to the cuspy density profile of a 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, with the latter tending to favor mass profiles with a flat central core. Many efforts have been devoted to resolving this cusp-core problem in recent years, among them, baryon-cold dark matter interactions are considered to be the main physical mechanisms erasing the cold dark matter (CDM) cusp into a flat core in the centers of all CDM halos. Clearly, baryon-cold dark matter interactions are not customized only for CDM-dominated disk galaxies, but for all types, including giant ellipticals. We first fit the most recent high resolution observations of rotation curves with the Burkert profile, then use the constrained core size-halo mass relation to calculate the lensing frequency, and compare the predicted results with strong lensing observations. Unfortunately, it turns out that the core size constrained from rotation curves of disk galaxies cannot be extrapolated to giant ellipticals. We conclude that, in the standard cosmological paradigm, baryon-cold dark matter interactions are not universal mechanisms for galaxy formation, and therefore, they cannot be true solutions to the cusp-core problem." @default.
- W2034804487 created "2016-06-24" @default.
- W2034804487 creator A5054261381 @default.
- W2034804487 creator A5068159241 @default.
- W2034804487 date "2009-10-21" @default.
- W2034804487 modified "2023-10-18" @default.
- W2034804487 title "Cusp-core problem and strong gravitational lensing" @default.
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- W2034804487 doi "https://doi.org/10.1088/1674-4527/9/11/001" @default.
- W2034804487 hasPublicationYear "2009" @default.
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