Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radio efficiency of pulsars   We investigate radio emission efficiency $\xi$ of pulsars and report a near
linear inverse correlation between $\xi$ and the spindown power $\dot E$, as
well as a near linear correlation between $\xi$ and pulsar age $\tau$. This is
a consequence of very weak, if any, dependences of radio luminosity $L$ on
pulsar period $P$ and period derivative $\dot{P}$, in contrast to X-ray or
$\gamma$-ray emission luminosities. The analysis of radio fluxes suggests that
these correlations are not due to a selection effect, but are intrinsic to the
pulsar radio emission physics. We have found that, although with a large
variance, the radio luminosity of pulsars is $\left<L\right>\approx 10^{29}
\,{\rm erg/s}$, regardless of the position in the $P-\dot P$ diagram. Within
such a picture, a model-independent statement can be made that the death line
of radio pulsars corresponds to an upper limit in the efficiency of radio
emission. If we introduce the maximum value for a radio efficiency into Monte
Carlo-based population syntheses we can reproduce the observed sample using the
random luminosity model. The Kolmogorov-Smirnov test on a synthetic flux
distribution shows high probability of reproducing the observed distribution.
Our results suggests that the plasma responsible for generating radio emission
is produced under similar conditions regardless of pulsar age, dipolar magnetic
field strength, and spin-down rate. The magnetic fields near the pulsar surface
are likely dominated by crust-anchored magnetic anomalies, which do not
significantly differ among pulsars, leading to similar conditions for
generating electron-positron pairs necessary to power radio emission.

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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex