Thermal and non-thermal X-ray emission from the rotation-powered radio/γ-ray pulsar PSR J1740+1000

We report the results of new XMM-Newton observations middle-aged ($\sim$10$^5$ yr) radio pulsar PSR J1740+1000 carried out in 2017-2018. These long pointings ($\sim$530 ks) show that non-thermal emission, well described by a power-law spectrum with photon index $\Gamma=1.80\pm0.17$, is pulsed $\sim$30% fraction above 2 keV. The thermal emission can be fit sum two blackbodies temperatures $kT_1=70\pm4$ eV, $kT_2=137\pm7$ $R_1=5.4_{-0.9}^{+1.3}$ km and $R_2=0.70_{-0.13}^{+0.15}$ (for distance 1.2 kpc). found no evidence for absorption lines as those observed shorter ($\sim$67 this 2006. X-ray components peak anti-phase none them seen to coincide phase pulse. This, coupled small difference radii components, disfavors an interpretation which dipolar polar cap heated magnetospheric backward-accelerated particles. Comparison other thermally-emitting isolated neutron stars spectra shows ratios $T_2$/$T_1$ $R_2$/$R_1$ are similar objects different classes. values cannot reproduced simple temperature distributions, such caused field, indicating presence more complicated maps.