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dark matter

This tag is associated with 45 posts
http://fermi.gsfc.nasa.gov/

Gamma-rays from the Galactic Center, a dark matter

For a few years now, excess emission of gamma-rays in the direction of the Galactic Center has puzzled scientists. In the paper we discuss today, the authors re-analyze data from the Fermi telescope to get new insights into the origin of this excess emission. They make the case for the signal being described by dark matter particles annihilating in the center of our Galaxy.

Where is that galaxy pointing?

Gravitational lensing is the deflection of the trajectory of a photon by gravity, and it is a natural consequence of the theory of General Relativity. Lensing distorts the shapes and orientations of galaxies and in today’s post, we discuss a new method to reconstruct dark matter maps of our Universe using the position angles of galaxies.

Dark matter and the Solar Interior

Depending on how they scatter with nuclei, dark matter particles might affect the structure and evolution of our Sun.

Detecting dark matter with milky way ripples

Using the upcoming Gaia telescope to measure ripples in the Milky Way will allow us to detect the impact of clumps of dark matter on our host galaxy.

Dark in the Lightness

New results from stacked weak lensing measurements of over a hundred thousand galaxies show that, on large scales, light from stars appears to trace the dark matter distribution of the Universe remarkably well.

A classic paper: how did the largest scale structure in the Universe form?

A relatively detailed discussion of a classic paper in cosmology, which basically covers everything you might want to know about how structure forms in the Universe on the very largest scales.

What Can Radio Emission Tell Us About Dark Matter?

Dark matter particles annihilating could potentially create electrons and positrons, generating continuum synchrotron emission. This paper attempts to find this signature in nearby dwarf galaxies.

Mysterious Gas Clouds between M31 and M33

Seven gas clouds have been found in the region between two galaxies. Are they part of a intergalactic filament or remnants from a past galaxy interaction?

Where are the positrons coming from?

In today’s astrobite, we discuss the puzzling results from the AMS-02 experiment, which has detected an excess of positrons in cosmic rays with respect to what we expect from known physical sources. Where are those positrons coming from?

Closing in on Dark Matter?

The Cryogenic Dark Matter Search experiment has found signatures in its data consistent with a dark matter Weakly Interacting Massive Particle. While not confident enough to declare a dark matter discovery, they estimate that there is only a 0.2% chance that these signatures are caused by random chance.

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