How does dark matter affect the Milky Way?

Dark matter also makes its presence known through gravitational lensing. The dark matter halo of a nearby galaxy distorts the light from background galaxies into a ring of mirages around the closer galaxy.

Does dark matter make galaxies spin faster?

Dark Matter It makes the outer parts of galaxies rotate faster than expected from their starlight. It makes galaxies in clusters orbit faster than expected from the total starlight of the galaxies.

How does dark matter affect the rotation of galaxies?

Instead, the rotation curve is nearly flat with increasing radius. Evidently there are huge amounts of unseen “dark” matter in the outer parts of the galaxy that add gravitational field beyond that just from the center, causing the stars and gas to orbit faster.

What is the dark matter in the Milky Way galaxy?

Scientists think that a halo of dark matter surrounds the Milky Way, extending out far beyond its visible edge, as occurs at other galaxies. Astronomers believe that dark matter shrouds the Milky Way — and other galaxies — in an elusive halo that extends far out into space.

What is affected by dark matter?

Dark matter does not interact directly with radiation, but it does affect the CMB by its gravitational potential (mainly on large scales), and by its effects on the density and velocity of ordinary matter.

Does dark matter cause gravitational lensing?

Dark matter is an invisible form of matter that makes up most of the universe’s mass and creates its underlying structure. Dark matter’s gravity drives normal matter (gas and dust) to collect and build up into stars and galaxies. This phenomenon is called gravitational lensing.

How does dark matter affect orbital speed?

Dark matter within our solar system cannot affect the Sun’s orbital speed. If you are looking for dark matter within our solar system, then you probably need to look for WIMPS. The other type of dark matter (MACHOS) are unlikely to be found within our solar system.

Does dark matter rotate?

A flat rotation curve is consistent with a roughly spherical distribution of dark matter with a flat core in a galaxy.

Is dark matter the only explanation for the flat rotation curve of the Milky Way?

‘ Indeed, more than 95\% of the mass of galaxies consists of dark matter. 1, where the velocity profile of galaxy NGC 6503 is displayed as a function of radial distance from the galactic center. The baryonic matter which accounts for the gas and disk cannot alone explain the galactic rotation curve.