Pulsars and Gravitational Waves Research

Gravitational waves are ripples in spacetime produced when massive objects like black holes or neutron stars spiral together and merge, and their detection by instruments such as LIGO and Virgo has opened a way to observe the universe that is entirely independent of light. Each merger event carries information about the objects involved — their masses, spins, and internal structure — allowing researchers to test whether general relativity holds under the most extreme conditions ever probed and to constrain the equation of state of nuclear matter, which describes how densely packed particles behave inside neutron stars. Pulsar timing arrays offer a complementary approach, using the clock-like regularity of rapidly rotating neutron stars to detect much lower-frequency gravitational waves, likely generated by pairs of supermassive black holes in distant galaxies. Key open questions include whether exotic forms of matter exist in neutron star cores, how often different types of compact binaries merge across cosmic history, and what a new generation of space-based detectors will reveal that ground-based instruments cannot reach.

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144,143

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1,859,400

Keywords

Gravitational WavesBinary Black HoleNeutron StarLIGO and VirgoEquation of StatePulsar Timing