Tag Info

New answers tagged

6

Assuming you take the usual position that dark matter interacts only via the weak and gravitational forces, then it doesn't just interact weakly with baryonic matter but it also interacts weakly with other dark matter. That makes it extremely unlikely that dark matter will form the sort of complex structures that make up you and I. I'm afraid it seems very ...


1

You are correct about the bias factor - because the dark matter distribution is not measured directly, but via tracers (galaxies), there may be some bias in the tracers. This is put into the analysis as an unknown bias parameter $b$ that needs to be fit. Now the second part of your question - why do we care about the dark matter? Briefly, it is because the ...


2

We know that 95% of the matter in the universe, and all around us, and in our room is dark matter. You are conflating dark matter and dark energy here. About 5% of the mass-energy of the universe is ordinary matter. Most (over 2/3) of that mass-energy is in the form of dark energy. The remaining 32% of this mass-energy is mass, or matter. About 84%, ...


3

In the "microscopic" sense, the formation of the Sun and solar system do not depend strongly on dark matter. Looking at things on the scale of GMCs, you can get a Jeans-unstable situation that will lead to star formation without invoking dark matter. There's a step much earlier in the history of the Universe that needs dark matter, though. In the early ...


-4

It is important to remember that Gravity is not a force. The search for gravitons or gravitinos is misguided. As explained by Einstein, Gravity is an affect caused by space being curved, where the curvature is a linear combination of the curvature caused by the sum of the energy density provided by each object in the Universe. Einstein's GR equations lead ...


1

Although Supersymmetry (SUSY) - under certain assumptions - predicts the existence of Dark Matter (DM) candidate, the signals for DM are not specific to SUSY. Fist, how to detect DM at the LHC: DM will not be detected by the experiments directly as it is believed (reasonable assumption) to not interact with regular matter. Therefore the only way of ...


1

This wouldn't work because the dark matter wouldn't be able to escape the black hole. Also, the measured mass of black holes contradicts this.



Top 50 recent answers are included