“spin-down”的概念、定义、翻译、参考文献-科学参考

单词	spin-down
释义	spin-down Astronomy A phenomenon in which the rotation period of a pulsar, P, steadily lengthens as the pulsar loses energy with age. Observed spin-down rates, Ṗ, range from 10⁻¹² s per second for the youngest pulsars down to 10⁻¹⁹ s per second for recycled pulsars. The quantity P/2Ṗ is known as the characteristic age or spin-down age of the pulsar, and is likely to represent an upper limit on the true age of the pulsar.
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