What Has Microlensing Told Us About the Role of Brown

question 398

Multiple Choice

What has microlensing told us about the role of brown dwarfs in the Milky Way Galaxy?

• A) Brown dwarfs cannot be a major component of the dark matter in the Galaxy.
• B) Brown dwarfs are a major component of the matter that is falling into the supermassive black hole in the galactic center.
• C) Brown dwarfs are one of the most important components of the Galaxy's dark matter.
• D) Microlensing has told us almost nothing yet about brown dwarfs-microlensing is too difficult to observe.