scholarly journals Cosmic Microwave Background Anisotropies in the Cold Dark Matter Model: A Covariant and Gauge‐invariant Approach

1999 ◽  
Vol 513 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Anthony Challinor ◽  
Anthony Lasenby
Keyword(s):  
Dark Matter ◽  
Cosmic Microwave Background ◽  
Cold Dark Matter ◽  
Microwave Background ◽  
Gauge Invariant ◽  
Cold Dark Matter Model ◽  
Matter Model ◽  
Invariant Approach ◽  
Dark Matter Model ◽  
Microwave Background Anisotropies

INFLATION AFTER WMAP

2011 ◽  
Vol 20 (08) ◽  
pp. 1471-1477
Author(s):  
KIN-WANG NG
Keyword(s):  
Dark Matter ◽  
Large Scale ◽  
Cold Dark Matter ◽  
Wilkinson Microwave Anisotropy Probe ◽  
Microwave Background ◽  
Cold Dark Matter Model ◽  
Cosmic Microwave Background Anisotropy ◽  
Matter Model ◽  
Reflection Asymmetry ◽  
Dark Matter Model

Recent measurements of the large-scale cosmic microwave background anisotropy made by the Wilkinson Microwave Anisotropy Probe (WMAP) mission indicate a reflection asymmetry, an axis of evil, a low quadrupole, and a few multipoles deviated from predicted in the cold dark matter model with a cosmological constant. All of these may give us a hint about the physics of inflation during the first few e-folds or during the inflating period. Efforts taken along this direction will be reviewed and our recent work will be discussed.

scholarly journals Resolving XENON excess with decaying cold dark matter

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Shuai Xu ◽  
Sibo Zheng
Keyword(s):  
Dark Matter ◽  
Large Scale ◽  
Cold Dark Matter ◽  
Recoil Energy ◽  
Microwave Background ◽  
Signal Rate ◽  
Cold Dark Matter Model ◽  
Electron Recoil ◽  
Matter Model ◽  
Dark Matter Model

AbstractWe propose a decaying cold dark matter model to explain the excess of electron recoil observed at the XENON1T experiment. In this scenario, the daughter dark matter from the parent dark matter decay easily obtains velocity large enough to saturate the peak of the electron recoil energy around 2.5 keV, and the observed signal rate can be fulfilled by the parent dark matter with a mass of order 10–200 MeV and a lifetime larger than the age of Universe. We verify that this model is consistent with experimental limits from dark matter detections, Cosmic microwave background and large scale structure experiments.

Velocity Bias in a Λ Cold Dark Matter Model

2000 ◽  
Vol 539 (2) ◽  
pp. 561-569 ◽  
Author(s):  
Pedro Colin ◽  
Anatoly A. Klypin ◽  
Andrey V. Kravtsov
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Cold Dark Matter Model ◽  
Matter Model ◽  
Dark Matter Model ◽  
Velocity Bias

scholarly journals The Milky Way’s halo and subhaloes in self-interacting dark matter

2019 ◽  
Vol 490 (2) ◽  
pp. 2117-2123 ◽  
Author(s):  
Victor H Robles ◽  
Tyler Kelley ◽  
James S Bullock ◽  
Manoj Kaplinghat
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Elastic Cross Section ◽  
Too Big To Fail ◽  
Density Profiles ◽  
Potential Core ◽  
Cold Dark Matter Model ◽  
Matter Model ◽  
Satellite Galaxies ◽  
Dark Matter Model

ABSTRACT We perform high-resolution simulations of an MW-like galaxy in a self-interacting cold dark matter model with elastic cross-section over mass of $1~\rm cm^2\, g^{-1}$ (SIDM) and compare to a model without self-interactions (CDM). We run our simulations with and without a time-dependent embedded potential to capture effects of the baryonic disc and bulge contributions. The CDM and SIDM simulations with the embedded baryonic potential exhibit remarkably similar host halo profiles, subhalo abundances, and radial distributions within the virial radius. The SIDM host halo is denser in the centre than the CDM host and has no discernible core, in sharp contrast to the case without the baryonic potential (core size ${\sim}7 \, \rm kpc$). The most massive subhaloes (with $V_{\mathrm{peak}}\gt 20 \, \rm km\, s^{-1}$) in our SIDM simulations, expected to host the classical satellite galaxies, have density profiles that are less dense than their CDM analogues at radii less than 500 pc but the deviation diminishes for less massive subhaloes. With the baryonic potential included in the CDM and SIDM simulations, the most massive subhaloes do not display the too-big-to-fail problem. However, the least dense among the massive subhaloes in both these simulations tend to have the smallest pericenter values, a trend that is not apparent among the bright MW satellite galaxies.

scholarly journals SIMULATED VOID GALAXIES IN THE STANDARD COLD DARK MATTER MODEL

2011 ◽  
Vol 735 (2) ◽  
pp. 132 ◽  
Author(s):  
Kathryn Kreckel ◽  
M. Ryan Joung ◽  
Renyue Cen
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Cold Dark Matter Model ◽  
Void Galaxies ◽  
Matter Model ◽  
Dark Matter Model

Redshift space clustering of galaxies and cold dark matter model

1993 ◽  
Vol 408 ◽  
pp. L77 ◽  
Author(s):  
Neta A. Bahcall ◽  
Renyue Cen ◽  
Mirt Gramann
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Cold Dark Matter Model ◽  
Matter Model ◽  
Dark Matter Model
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