Understanding Dark Matter

What is the primary role of dark matter in the universe?

• To emit light and heat

• To dominate the gravitational structure

• To form visible stars and planets

• To interact with electromagnetic forces

Which particle is considered a potential candidate for dark matter due to the WIMP miracle?

• Electron

• Photon

• Neutrino

• WIMP

What problem arises from the CDM model predicting too many satellite galaxies?

• Too-big-to-fail problem

• Cusp-core problem

• Density-diversity problem

• Missing satellites problem

How does warm dark matter differ from cold dark matter?

• It forms larger structures

• It has higher particle speeds

• It is composed of baryons

• It interacts with electromagnetic forces

What is the role of supernovae in the context of dark matter?

• They have no effect on dark matter

• They eliminate dark matter

• They create dark matter

• They help redistribute dark matter

Why is ordinary matter significant in dark matter simulations?

• It only affects visible structures

• It influences dark matter distribution

• It has no significant role

• It forms the majority of the universe's mass

What is a potential solution to the cusp-core problem?

• Using only visible matter in simulations

• Ignoring ordinary matter

• Introducing self-interacting dark matter

• Increasing the temperature of dark matter

What is the 'density-diversity' problem in the context of dark matter?

• Lack of dark matter in certain galaxies

• Variation in dark matter density unrelated to star formation

• Dark matter density only in the galactic core

• Uniform density of dark matter across all galaxies

What is the 'too-big-to-fail' problem?

• Dark matter not forming any structures

• Galaxies being too large to exist

• Large sub-haloes failing to form stars

• Small sub-haloes forming too many stars

What is the main challenge in understanding dark matter?

• Lack of visible evidence

• Too many theoretical models

• Complex interactions with ordinary matter

• Inability to simulate dark matter