scholarly journals Evolution of the dark matter distribution with three-dimensional weak lensing

2005 ◽  
Vol 363 (3) ◽  
pp. 723-733 ◽  
Author(s):  
D. J. Bacon ◽  
A. N. Taylor ◽  
M. L. Brown ◽  
M. E. Gray ◽  
C. Wolf ◽  
...  
Keyword(s):  
Dark Matter ◽  
Three Dimensional ◽  
Weak Lensing ◽  
Matter Distribution ◽  
Dark Matter Distribution

scholarly journals The Mass Distribution In Clusters Of Galaxies From Weak And Strong Lensing

1996 ◽  
Vol 173 ◽  
pp. 131-136 ◽  
Author(s):  
Jordi Miralda-Escudé
Keyword(s):  
Dark Matter ◽  
Mass Distribution ◽  
Inversion Formula ◽  
Weak Lensing ◽  
Clear Understanding ◽  
Clusters Of Galaxies ◽  
Matter Distribution ◽  
Strong Lensing ◽  
Similar Information ◽  
Dark Matter Distribution

This paper is intended as an introduction to the theory of weak lensing. A review of the inversion formula introduced by Kaiser and Squires is presented. We then prove the formula of the aperture densitometry method in a simple way that allows a clear understanding of where the various terms come from. This is particularly useful to measure quantitatively masses in any region of a lens. We then summarize what has been learned from observations of strong lensing about the dark matter distribution; weak lensing should provide similar information on larger scales in clusters of galaxies.

scholarly journals Three-dimensional structure of the Sagittarius dwarf spheroidal core from RR Lyrae

2020 ◽  
Vol 495 (4) ◽  
pp. 4124-4134 ◽  
Author(s):  
Peter S Ferguson ◽  
Louis E Strigari
Keyword(s):  
Dark Matter ◽  
Statistical Significance ◽  
Three Dimensional ◽  
Major Axis ◽  
Prolate Spheroid ◽  
Dimensional Structure ◽  
Galactic Centre ◽  
Matter Distribution ◽  
Rr Lyrae ◽  
Dark Matter Distribution

ABSTRACT We obtain distances to a sample of RR Lyrae in the central core of the Sagittarius dwarf spheroidal galaxy from OGLE data. We use these distances, along with RR Lyrae from Gaia DR2, to measure the shape of the stellar distribution within the central ∼2 kpc. The best-fitting stellar distribution is triaxial, with axis ratios 1 : 0.76 : 0.43. A prolate-spheroid model is ruled out at high statistical significance relative to the triaxial model. The major axis is aligned nearly parallel to the sky plane as seen by an Earth-based observer and is nearly perpendicular to the direction of the Galactic Centre. This result may be compared to cosmological simulations which generally predict that the major axis of the dark matter distribution of subhalos is aligned with the Galactic Centre. The triaxial structure that we obtain can provide important constraints on the Sagittarius progenitor, as well as the central dark matter distribution under the assumption of dynamical equilibrium.

scholarly journals Evolution of the Dark Matter Distribution with 3-D Weak Lensing

2004 ◽  
Vol 2004 (IAUS225) ◽  
pp. 37-42
Author(s):  
D. J. Bacon ◽  
A. N. Taylor ◽  
M. L. Brown ◽  
M. E. Gray ◽  
C. Wolf ◽  
...  
Keyword(s):  
Dark Matter ◽  
Weak Lensing ◽  
Matter Distribution ◽  
Dark Matter Distribution

scholarly journals MC2: MAPPING THE DARK MATTER DISTRIBUTION OF THE “TOOTHBRUSH” CLUSTER RX J0603.3+4214 WITHHUBBLE SPACE TELESCOPEAND SUBARU WEAK LENSING

2016 ◽  
Vol 817 (2) ◽  
pp. 179 ◽  
Author(s):  
M. James Jee ◽  
William A. Dawson ◽  
Andra Stroe ◽  
David Wittman ◽  
Reinout J. van Weeren ◽  
...  
Keyword(s):  
Dark Matter ◽  
Weak Lensing ◽  
Matter Distribution ◽  
Dark Matter Distribution

scholarly journals DARK MATTER DYNAMICS AND INDIRECT DETECTION

2005 ◽  
Vol 20 (14) ◽  
pp. 1021-1036 ◽  
Author(s):  
GIANFRANCO BERTONE ◽  
DAVID MERRITT
Keyword(s):  
Dark Matter ◽  
Total Mass ◽  
Galactic Center ◽  
Direct Detection ◽  
Indirect Detection ◽  
Matter Distribution ◽  
Dark Matter Distribution ◽  
Particle Dark Matter ◽  
The Universe ◽  
Rule Out

Non-baryonic, or "dark", matter is believed to be a major component of the total mass budget of the Universe. We review the candidates for particle dark matter and discuss the prospects for direct detection (via interaction of dark matter particles with laboratory detectors) and indirect detection (via observations of the products of dark matter self-annihilations), focusing in particular on the Galactic center, which is among the most promising targets for indirect detection studies. The gravitational potential at the Galactic center is dominated by stars and by the supermassive black hole, and the dark matter distribution is expected to evolve on sub-parsec scales due to interaction with these components. We discuss the dominant interaction mechanisms and show how they can be used to rule out certain extreme models for the dark matter distribution, thus increasing the information that can be gleaned from indirect detection searches.

scholarly journals Dark matter distribution induced by a cosmic string wake in the nonlinear regime

2018 ◽  
Vol 98 (8) ◽  
Author(s):  
Disrael Camargo Neves da Cunha ◽  
Joachim Harnois-Deraps ◽  
Robert Brandenberger ◽  
Adam Amara ◽  
Alexandre Refregier
Keyword(s):  
Dark Matter ◽  
Cosmic String ◽  
Nonlinear Regime ◽  
Matter Distribution ◽  
Dark Matter Distribution

scholarly journals The Dark Matter Distribution in the Central Regions of Galaxy Clusters: Implications for Cold Dark Matter

2004 ◽  
Vol 604 (1) ◽  
pp. 88-107 ◽  
Author(s):  
David J. Sand ◽  
Tommaso Treu ◽  
Graham P. Smith ◽  
Richard S. Ellis
Keyword(s):  
Dark Matter ◽  
Galaxy Clusters ◽  
Cold Dark Matter ◽  
Matter Distribution ◽  
Central Regions ◽  
Dark Matter Distribution
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