Observations of these objects are used to probe the free electron density of the universe.
Observations of these objects are used to probe the free electron density of the universe. They eventually reach the death line or death valley, and a binary system consisting of two of these objects was discovered by Hulse and Taylor. They sometimes experience sudden increases in frequency known as glitches. They can be powered by accretion or rotation, and highly magnetized ones are known as magnetars. These stars' emissions and precisely periodic rotation result in a "lighthouse effect." For 10 points, name these rapidly rotating neutron stars that emit a beam of radiation.
Observations of these objects are used to probe the free electron density of the universe.
pulsars [prompt on "neutron stars" before it is mentioned] 