XMM-Newton Observations of Radio Pulsars B0834+06 and B0826-34 and Implications for Pulsar Inner Accelerator

Abstract

We report the X-ray observations of two radio pulsars with drifting subpulses: B0834 + 06 and B0826 - 34 using \xmm\. PSR B0834 + 06 was detected with a total of 70 counts from the three EPIC instruments over 50 ks exposure time. Its spectrum was best described as that of a blackbody (BB) with temperature $T_s=(2.0_{-0.9}^{+2.0})\times 10^6$ K and bolometric luminosity of $L_b=(8.6_{-4.4}^{+14.2})\times 10^{28}$ erg s${}^{-1}$. As it is typical in pulsars with BB thermal components in their X-ray spectra, the hot spot surface area is much smaller than that of the canonical polar cap, implying a non-dipolar surface magnetic field much stronger than the dipolar component derived from the pulsar spin-down (in this case about 50 times smaller and stronger, respectively). The second pulsar PSR B0826 - 34 was not detected over 50 ks exposure time, giving an upper limit for the bolometric luminosity $L_b\le 1.4\times 10^{29}$ erg s${}^{-1}$. We use these data as well as the radio emission data concerned with drifting subpulses to test the Partially Screened Gap (PSG) model of the inner accelerator in pulsars.

Accepted for publication by The Astrophysical Journal

References in corpus (7)

• The ATNF Pulsar Catalogue
• Density-Functional-Theory Calculations of Matter in Strong Magnetic Fields: I. Atoms and Molecules
• The bright spiky emission of pulsar B0656+14
• XMM-Newton observation of the drifting pulsar B0943+10
• The Topology and Polarisation of Subbeams Associated with the `Drifting' Subpulse Emission of Pulsar B0943+10 -- IV. Q-to-B-Mode Recovery Dynamics
• Resolving the bow-shock nebula around the old pulsar PSR B1929+10 with multi-epoch Chandra observations
• X-ray pulsar radiation from polar cap heated by back-flow bombardment

Cited by in corpus (14)

• Meterwavelength Single-pulse Polarimetric Emission Survey II: The phenomenon of Drifting Subpulses
• Constraining the Spin-down of the Nearby Isolated Neutron Star RX J2143.0+0654
• Magnetic Fields of Neutron Stars
• Detection of X-ray Emission from the Very Old Pulsar J0108-1431
• Differential Frequency-dependent Delay from the Pulsar Magnetosphere
• Pulsar bi-drifting: implications for polar cap geometry
• XMM-Newton observation of the nearby pulsar B1133+16
• Magnetothermal Evolution of Neutron Stars with Emphasis to Radio Pulsars
• Two Dimensional Configuration and Temporal Evolution of Sparking discharges in Pulsars
• The Green Bank North Celestial Cap Pulsar Survey. IV: Four New Timing Solutions
• Estimating the evolution of Sparks in Partially Screened Gap of Pulsars from Subpulse Drifting
• The radio and X-ray mode-switching pulsar PSR B0943+10
• Consequences of Energetic Magnetar-Like Outbursts of Nearby Neutron Stars: ${}^{14}$C Events and the Cosmic Electron Spectrum
• Synchrotron X-ray emission from old pulsars