A strong $\ddotν - \dotν$ correlation in radio pulsars with implications for torque variations

Details A strong $\ddotν - \dotν$ correlation in radio pulsars with implications for torque variations A strong $\ddotν - \dotν$ correlation in radio pulsars with implications for torque variations

2006-05-16

arxiv.org/abs/astro-ph/0605380v2

Mon.Not.Roy.Astron.Soc.Lett. 370 (2006) L76-L79

Astronomy and Astrophysics

Astrophysics

MNRAS, 4 pages, 2 figures. Minor editorial changes and typos corrected

Scientific paper

10.1111/j.1745-3933.2006.00192.x

We present an analysis of the spin-down parameters for 131 radio pulsars for which $\ddot\nu$ has been well determined. These pulsars have characteristic ages ranging from $10^{3} - 10^{8}$ yr and spin periods in the range 0.4--30 s; nearly equal numbers of pulsars have $\ddot\nu>0$ as $\ddot\nu<0$. We find a strong correlation of $\ddot\nu$ with $\dot{\nu}$, {\em independent of the sign of} $\ddot\nu$. We suggest that this trend can be accounted for by small, stochastic deviations in the spin-down torque that are directly proportional (in magnitude) to the spin-down torque.

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