SIMBAD references

2011ApJ...739...39A - Astrophys. J., 739, 39 (2011/September-3)

Discovery of an energetic pulsar associated with SNR G76.9+1.0.

ARZOUMANIAN Z., GOTTHELF E.V., RANSOM S.M., SAFI-HARB S., KOTHES R. and LANDECKER T.L.

Abstract (from CDS):

We report the discovery of PSR J2022+3842, a 24 ms radio and X-ray pulsar in the supernova remnant G76.9+1.0, in observations with the Chandra X-ray Observatory, the Robert C. Byrd Green Bank Radio Telescope, and the Rossi X-ray Timing Explorer (RXTE). The pulsar's spin-down rate implies a rotation-powered luminosity {dot}E = 1.2 x 1038 erg/s, a surface dipole magnetic field strength Bs= 1.0x1012 G, and a characteristic age of 8.9 kyr. PSR J2022+3842 is thus the second-most energetic Galactic pulsar known, after the Crab pulsar, as well as the most rapidly rotating young, radio-bright pulsar known. The radio pulsations are highly dispersed and broadened by interstellar scattering, and we find that a large (δf/f ~ 1.9x10–6) spin glitch must have occurred between our discovery and confirmation observations. The X-ray pulses are narrow (0.06 cycles FWHM) and visible up to 20 keV, consistent with magnetospheric emission from a rotation-powered pulsar. The Chandra X-ray image identifies the pulsar with a hard, unresolved source at the midpoint of the double-lobed radio morphology of G76.9+1.0 and embedded within faint, compact X-ray nebulosity. The spatial relationship of the X-ray and radio emissions is remarkably similar to the extended structure seen around the Vela pulsar. The combined Chandra and RXTE pulsar spectrum is well fitted by an absorbed power-law model with column density NH= (1.7±0.3) x 1022/cm2 and photon index Γ = 1.0±0.2; this implies that the Chandra point-source flux is virtually 100% pulsed. For a distance of 10 kpc, the X-ray luminosity of PSR J2022+3842 is LX(2-10 keV) = 7.0x1033 erg/s. Despite being extraordinarily energetic, PSR J2022+3842 lacks a bright X-ray wind nebula and has an unusually low conversion efficiency of spin-down power to X-ray luminosity, Lx/ {dot}E = 5.9 x 10 –5.

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Journal keyword(s): ISM: supernova remnants - pulsars: individual: PSR J2022+3842 - stars: neutron - X-rays: stars

Simbad objects: 25

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