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WIMPs

This tag is associated with 7 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 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.

The search for WIMP annihilation in the Sun

The quest for identifying the dark matter particle is well underway. Today, we discuss the work of the ANTARES collaboration, which is using a neutrino telescope to search for signals of dark matter annihilation in the Sun.

What happens when WIMPs collide — with you?

If WIMPs are the solution to the dark matter problem, it’s reasonable to ask what sort of impact they would have on human beings. This paper answers that question.

OGLEing MACHOs

In previous astrobites posts, we’ve talked about using microlensing to find planets and to detect dark matter in other galaxies. However, one of the earliest applications of microlensing was a bit closer to home: the detection of compact objects in the dark matter halo of our own galaxy. We know there is a lot more mass in galaxies, including our own, than what we can see. Dark matter comprises more than 80% of the matter in our Universe, but what is it really comprised of?

Dark Matter and Planet Habitability

This eye-catching theory paper asks an elegant but simple question: when dark matter is gravitationaly captured by a planet, can the energy released when it annihalates provide enough heat to make the planet habitable?

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