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What is pulsar UPSC NOTE

 Why in news

  • In 1969, two research groups reported an abrupt and brief increase in the rotation rate of a pulsar; this glitch remains to be explained 44 years on; to date, physicists have spotted more than 3,000 pulsars and around 700 such glitches, and are starting to get a sense of why they happen.

What is pulsar

  • A pulsar is a fascinating celestial object, essentially a cosmic lighthouse of sorts.

  • A highly magnetized, rotating neutron star

  • Neutron stars are incredibly dense stellar remnants formed after massive stars run out of fuel and explode as supernovas

  • Their spin can be incredibly fast, with some completing multiple rotations per millisecond.

  • It emits beams of electromagnetic radiation (like light, radio waves, X-rays, etc.) from its magnetic poles. 

  • These beams sweep across space like a lighthouse beam, creating the "pulsing" effect when they reach Earth.

  • Imagine the pulsar's magnetic poles aren't aligned with its rotation axis

  • As it spins, these beams sweep across space, and if one happens to point towards Earth, we receive a pulse of radiation

  • This rotation and alignment create the characteristic regularity of the pulses, ranging from milliseconds to seconds for different pulsars.



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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: What is pulsar UPSC NOTE
What is pulsar UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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