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?