XMM-Newton Observations of Young and Energetic Pulsar J2022+3842

Abstract

We report on $XMM-Newton$ EPIC observations of the young pulsar J2022+3842, with a characteristic age of 8.9 kyr. We detected X-ray pulsations and found the pulsation period $P\approx 48.6$ ms, and its derivative $\dot{P}\approx 8.6\times 10^{-14}$, twice larger than the previously reported values. The pulsar exhibits two very narrow (FWHM $\sim 1.2$ ms) X-ray pulses each rotation, separated by $\approx 0.48$ of the period, with a pulsed fraction of $\approx 0.8$. Using the correct values of $P$ and $\dot{P}$, we calculate the pulsar's spin-down power $\dot{E}=3.0\times 10^{37}$ erg s${}^{-1}$ and magnetic field $B=2.1\times 10^{12}$ G. The pulsar spectrum is well modeled with a hard power-law (PL) model (photon index $\Gamma =0.9\pm 0.1$, hydrogen column density $n_H=(2.3\pm 0.3)\times 10^{22}{\mathrm{cm}}^{-2}$). We detect a weak off-pulse emission which can be modeled with a softer PL ($\Gamma \approx 1.7\pm 0.7$), poorly constrained because of contamination in the EPIC-pn timing mode data. The pulsar's X-ray efficiency in the $0.5-8$ keV energy band, ${\eta }_{\mathrm{PSR}}=L_{\mathrm{PSR}}/\dot{E}=2\times 10^{-4}(D/10\mathrm{kpc}{)}^2$, is similar to those of other pulsars. The $XMM-Newton$ observation did not detect extended emission around the pulsar. Our re-analysis of $Chandra$ X-ray observatory archival data shows a hard, $\Gamma \approx 0.9\pm 0.5$, spectrum and a low efficiency, ${\eta }_{\mathrm{PWN}}\sim 2\times 10^{-5}(D/10\mathrm{kpc}{)}^2$, for the compact pulsar wind nebula, unresolved in the $XMM-Newton$ images.

arXiv comment10 pages, 13 figures; accepted by ApJ

References in corpus (10)

• On the Absorption of X-rays in the Interstellar Medium
• Fermi Large Area Telescope Second Source Catalog
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• NE2001.I. A New Model for the Galactic Distribution of Free Electrons and its Fluctuations
• Pulsar Wind Nebulae in the Chandra Era
• An Atlas For Interpreting Gamma-Ray Pulsar Light Curves
• Non-Thermal X-ray Properties of Rotation Powered Pulsars and Their Wind Nebulae
• Discovery of an Energetic Pulsar Associated with SNR G76.9+1.0
• Hard X-ray timing and spectral characteristics of the energetic pulsar PSR J0205+6449 in supernova remnant 3C58

Cited by in corpus (13)

• The soft gamma-ray pulsar population: an high-energy overview
• Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run
• First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data
• Optical observations of PSR J2021+3651 in the Dragonfly Nebula with the GTC
• Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars
• Constraining the parameters of the pulsar wind nebula DA 495 and its pulsar with Chandra and XMM-Newton
• Kinematics of Ultra-High-Velocity Gas in the Expanding Molecular Shell adjacent to the W44 Supernova Remnant
• Deep Chandra Survey of the Small Magellanic Cloud. II. Timing Analysis of X-ray Pulsars
• Magnetic Field Structure and Faraday Rotation of the Plerionic Supernova Remnant G21.5$-$0.9
• The Enigmatic compact radio source coincident with the energetic X-ray pulsar PSR J1813$-$1749 and HESS J1813$-$178
• On X-ray emission of radio pulsars
• Distances of Galactic Radio Pulsars; First Quadrant: $-2^{\circ }<\ell <90^{\circ }$ and $-2^{\circ }<b<2^{\circ }$
• A high-magnetic-field radio pulsar survey with Swift/XRT