Pulsar

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Airteestic animation o a Pulsar pullin maiter frae a nearbi starn

A pulsar (short for pulsatin radio starn)[1] is a heichly magnetised, rotatin neutron starn that emits a beam o electromagnetic radiation. This radiation can be observed anerly whan the beam o emission is pyntin taewart Yird (muckle lik the wey a lichthoose can be seen anerly whan the licht is pyntit in the direction o an observer), an is responsible for the pulsed appearance o emission. Neutron starns are verra dense, an hae short, regular rotational periods. This produces a verra precise interval atween pulses that range frae milliseiconts tae seiconts for an individual pulsar. Pulsars are believed tae be ane o the candidates for the soorce o ultra-heich-energy cosmic rays (see an a centrifugal mechanism o acceleration).

The precise periods o pulsars mak them verra uisefu tuils. Observations o a pulsar in a binar neutron starn seestem war uised tae indirectly confirm the exeestence o gravitational radiation. The first extrasolar planets war diskivered aroond a pulsar, PSR B1257+12. Certaint teeps o pulsars rival atomic clocks in their accuracy in keepin time.[2]

References[eedit | eedit soorce]

  1. http://www.merriam-webster.com/dictionary/pulsar
  2. Sullivan, Walter (February 9, 1983). "PULSAR TERMED MOST ACCURATE 'CLOCK' IN SKY". NY Times. The New York Times. Retrieved January 15, 2018.