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- W4320513534 abstract "The origin and radiation mechanisms of high energy emissions from pulsars have remained mysterious since their discovery. Here we report, based on a sample of 68 pulsars, observational connection of non-thermal X-ray emissions from pulsars with their timing properties and thermal emissions, which may provide some constraints on theoretical modeling. Besides strong correlations with the spin-down power $dot{E}$ and the magnetic field strength at the light cylinder $B_{rm lc}$, the non-thermal X-ray luminosity in 0.5 - 8 keV, $L_{rm p}$, represented by the power-law component in the spectral model, is found to be strongly correlated with the highest possible electric field strength in the polar gap, $E_{rm pc}$, of the pulsar. The spectral power index $Gamma_{rm p}$ of that power-law component is also found, for the first time in the literature, to strongly correlate with $dot{E}$, $B_{rm lc}$ and $E_{rm pc}$, thanks to the large sample. In addition, we found that $L_{rm p}$ can be well described by $L_{rm p}propto T^{5.96pm 0.64}R^{2.24pm 0.18}$, where $T$ and $R$ are the surface temperature and the emitting-region radius of the surface thermal emission, represented by the black-body component in the spectral model. $Gamma_{rm p}$, on the other hand, can be well described only when timing variables are included, and the relation is $Gamma_{rm p} = log(T^{-5.8pm 1.93}R^{-2.29pm 0.85}P^{-1.19pm 0.88}dot{P}^{0.94pm 0.44})$ plus a constant. These relations strongly suggest the existence of connections between surface thermal emission and electron-positron pair production in pulsar magnetospheres." @default.
- W4320513534 created "2023-02-14" @default.
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- W4320513534 date "2023-01-31" @default.
- W4320513534 modified "2023-10-18" @default.
- W4320513534 title "Observational connection of non-thermal X-ray emission from pulsars with their timing properties and thermal emission" @default.
- W4320513534 doi "https://doi.org/10.48550/arxiv.2302.00204" @default.
- W4320513534 hasPublicationYear "2023" @default.
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