A binary pulsar is a pulsar that is in orbit around another object, usually another star or a white dwarf. Pulsars are highly magnetized, rotating neutron stars that emit beams of electromagnetic radiation that can be detected on Earth as a series of regular pulses.
When a pulsar is in a binary system, it can be used to study a wide range of astrophysical phenomena, including general relativity, the properties of neutron stars, and the evolution of binary star systems. In particular, binary pulsars have been used to test and confirm some of the predictions of Einstein’s theory of general relativity, including the existence of gravitational waves and the effect of gravitational redshift.
The first binary pulsar, PSR B1913+16, was discovered by Russell Hulse and Joseph Taylor in 1974. They found that the pulsar was in orbit around another star, and that the orbit was decaying in a way that was consistent with the emission of gravitational waves, as predicted by general relativity. This discovery led to Hulse and Taylor being awarded the Nobel Prize in Physics in 1993.
Since then, many more binary pulsars have been discovered, and they have been used to study a wide range of astrophysical phenomena. For example, they have been used to measure the masses and radii of neutron stars, and to study the behavior of matter in the extreme conditions found in the vicinity of these objects. They have also been used to study the formation and evolution of binary star systems, School Management System, and to search for new gravitational wave sources.