Gravitational lensing: a unique probe of dark matter and dark energy

Ellis, Richard S.

doi:10.1098/rsta.2009.0209

Cited by 48 publications

(30 citation statements)

References 55 publications

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“…would provide the extra attraction for the rotation curves and an extra deflection for lensing ("This distribution is spacially more extended than that of the visible baryons, demonstrating clearly the existence of dark matter" [30]), although alternative explanations have been proposed as well as for the bullet cluster [31]. Indeed that would result in an extra 1 r term in the previous equation (accounting for a constant v in the halo) equivalent to a modification of the acceleration in Newton's law [32].…”

Section: Structures A) Cmb and The Event Horizonmentioning

confidence: 99%

Cosmogonic Speculations: Particle Creation from Energy Conservation in the Universe Evolution

Christillin¹

2016

JMP

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Information about the Universe from Hubble's law is consistent with that coming from the evaluation of inertial forces, supporting the picture of a steady state expansion of a black hole Universe. Backed up also by the consideration of the black body self energy, the post big bang temperature decrease is consistent with particle creation if energy conservation applies at every scale. This process is shown to provide a gravitational repulsive force which can counterbalance gravitational attraction thus allowing the possibility of a steady non-inflationary expansion. That seems to provide an alternative coherent scheme for our picture of the Universe evolution, disposing of the cosmological term, of dark energy and of the bulk of dark matter.

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Section: Structures A) Cmb and The Event Horizonmentioning

confidence: 99%

Cosmogonic Speculations: Particle Creation from Energy Conservation in the Universe Evolution

Christillin¹

2016

JMP

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“…Several methods are used to study the content and distribution of DM, for example the virial theorem (see , the X-ray properties of the emitting hot gas (see Buote & Humphrey 2012 for a review, Nagino & Matsushita 2009), the dispersion velocities of kinematical tracers and stellar dynamics (see Gerhard 2010 for a review; Napolitano et al 2011) and combining weak and strong lensing data (see Ellis 2010 andTreu 2010 for a review).…”

Section: Introductionmentioning

confidence: 99%

On the surface density of dark matter haloes

Saburova

Popolo

2014

Monthly Notices of the Royal Astronomical Society

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In this article, we test the conclusion of Donato et al. (2009) concerning the universality of the DM halo surface density µ 0D = ρ 0 r 0 . According to our study, the dispersion of values of µ 0D is twice higher than that found by Donato et al. (2009). We conclude, in contrast with Donato et al. (2009), that the DM surface density and its Newtonian acceleration are not constant but correlate with the luminosity, morphological type, (B − V ) 0 colour index, and the content of neutral hydrogen. These DM parameters are higher for more luminous systems of early types with red colour and low gas content. We also found that the correlation of DM parameters with colour index appears to be the manifestation of a stronger relation between DM halo mass and the colour of a galaxy. This finding is in agreement with cosmological simulations (Guo et al, 2011). These results leave little room for the recently claimed universality of DM column density. We also found that isolated galaxies in our sample (contained in the Analysis of the interstellar Medium of Isolated GAlaxies (AMIGA) catalogue) do not differ significantly in their value of µ 0D from the entire sample. Thus, since the AMIGA catalogue gives a sample of galaxies that have not interacted with a significant mass neighbour in the past 3 Gyr, the difference between the systems with low and high values of µ 0D is not related to the merging events during this period of time.

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“…A recent review on this physical theory (deflection of light rays due to the gravitation) can be found in [6], where some multi-shape geometry is also discussed.…”

Section: Some Discussionmentioning

confidence: 99%

“…Let t n ∈ (0, b](b > 0) be a sequence, Δ ⊂ (0, b] be a segment, and let the indices ξ(n) be defined as in Eq. (6). We say that the map ξ : N → N enumerates t n on Δ and t ξ(k) (k = 1, 2, .…”

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confidence: 99%

A Decomposition of the Rotation of Circle

Shahverdian

2010

Results. Math.

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The paper concerns the dynamics-related properties of the rotation map of a circle (rotation of the plane). A self-similar structure of orbits of the rotation map is established. That is, a possibility of decomposition of orbits of a given rotation map into a finite set of orbits of other such maps is proved-it is shown that every orbit of iterates of the rotation of circle on irrational angle, after linear re-scaling of its argument can be represented as a finite set of such orbits situated on another circles. A pointwise self-similarity of classical trigonometric system is established and an application to Fourier expansion, which emphasizes a possibility of shifting of signals with respect to time, is presented. The free mechanical motion is also considered. A special dynamical spectrum of frequencies or speeds, associated with a given uniform circular or rectilinear motion, is defined. We prove that an appropriate fragmentation of time axis yields a decomposition of a given orbit of the free continuous-time motion into a set of such orbits propagating in new time and such decomposition is consistent with the decomposition of the per time unit discrete motion. Particularly, our theorems assert that due to a piecewise-linear transform of spatial and time variables the rectilinear rays change their direction.

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Gravitational lensing: a unique probe of dark matter and dark energy

Cited by 48 publications

References 55 publications

Cosmogonic Speculations: Particle Creation from Energy Conservation in the Universe Evolution

Cosmogonic Speculations: Particle Creation from Energy Conservation in the Universe Evolution

On the surface density of dark matter haloes

A Decomposition of the Rotation of Circle

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