Discovery of a 112 ms X-ray Pulsar in Puppis A: Further Evidence of Neutron Stars Weakly Magnetized at Birth

Abstract

We report the discovery of 112-ms X-ray pulsations from RX J0822-4300, the compact central object (CCO) in the supernova remnant Puppis A, in two archival Newton X-Ray Multi-Mirror Mission observations taken in 2001. The sinusoidal light curve has a pulsed fraction of 11% with an abrupt 180 deg. change in phase at 1.2 keV. The observed phase shift and modulation are likely the result of emission from opposing thermal hot spots of distinct temperatures. Phase-resolved spectra reveal an emission feature at E(line) = 0.8 keV associated with the cooler region, possibly due to an electron cyclotron resonance effect similar to that seen in the spectrum of the CCO pulsar 1E 1207.4-5209. No change in the spin period of PSR J0821-4300 is detected in 7 months, with a 2 sigma upper limit on the period derivative less than 8.3E-15. This implies limits on the spin-down energy loss rate of less than 2.3E35 erg/s, the surface magnetic dipole field strength B_s < 9.8E11 G, and the spin-down age tau > 220 kyr. The latter is much longer than the SNR age, indicating that PSR J0821-4300 was born spinning near its present period. Its properties are remarkably similar to those of the two other known CCO pulsars, demonstrating the existence of a class of neutron stars born with weak magnetic fields related to a slow original spin. These results are also of importance in understanding the extreme transverse velocity of PSR J0821-4300, favoring the hydrodynamic instability mechanism in the supernova explosion.

arXiv comment5 pages, 4 figure, Latex, emulateapj style. To appear in the Astrophysical Journal

References in corpus (21)

• Evidence for alignment of the rotation and velocity vectors in pulsars
• Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions
• Neutron Star Kicks in Isolated and Binary Pulsars: Observational Constraints and Implications for Kick Mechanisms
• Birth Kick Distributions and the Spin-Kick Correlation of Young Pulsars
• On the Spin History of the X-ray Pulsar in Kes 73: Further Evidence For an Utramagnetized Neutron Star
• Infrared Echoes near the Supernova Remnant Cassiopeia A
• XMM-Newton and VLT observations of the isolated neutron star 1E 1207.4-5209
• 1E 1207.4-5209: The puzzling pulsar at the center of the PKS 1209-51/52 supernova remnant
• Discovery of a 105 ms X-ray Pulsar in Kesteven 79: On the Nature of Compact Central Objects in Supernova Remnants
• Precise Timing of the X-ray Pulsar 1E 1207.4-5209: A Steady Neutron Star Weakly Magnetized at Birth
• Central Compact Objects in Supernova Remnants
• Constraints on the Emission and Viewing Geometry of the Transient Anomalous X-ray Pulsar XTE J1810-197
• Direct Measurement of Neutron-Star Recoil in the Oxygen-Rich Supernova Remnant Puppis A
• X-ray Timing of PSR J1852+0040 in Kesteven 79: Evidence of Neutron Stars Weakly Magnetized at Birth
• Infrared Echoes Reveal the Shock Breakout of the Cas A Supernova
• X-ray observations of RX J0822-4300 and Puppis-A
• Protoneutron star dynamos: pulsars, magnetars, and radio-silent X-ray emitting neutron stars
• X-ray Pulsations from the Central Source in Puppis A
• Probing the Proper Motion of the Central Compact Object in Puppis-A with the Chandra High Resolution Camera
• Structure of the interstellar medium around Cas A
• CCO Pulsars as Anti-Magnetars: Evidence of Neutron Stars Weakly Magnetized at Birth

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• The Spin-down of PSR J0821-4300 and PSR J1210-5226: Confirmation of Central Compact Objects as Anti-Magnetars
• First search for gravitational waves from the youngest known neutron star
• Evolution of a buried magnetic field in the central compact object neutron stars
• Cooling rates of neutron stars and the young neutron star in the Cassiopeia A supernova remnant
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• Central Compact Objects in Supernova Remnants
• Initial spin periods of neutron stars in supernova remnants
• Intermediate-Mass-Elements in Young Supernova Remnants Reveal Neutron Star Kicks by Asymmetric Explosions
• Multi-wavelength Observations of the Radio Magnetar PSR J1622-4950 and Discovery of its Possibly Associated Supernova Remnant
• The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A
• A dedicated Chandra ACIS observation of the central compact object in the Cassiopeia A supernova remnant
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• Modeling the Surface X-ray Emission and Viewing Geometry of PSR J0821-4300 in Puppis A
• Absorption Features in the X-ray Spectrum of an Ordinary Radio Pulsar
• Modeling the X-rays from the Central Compact Object PSR J1852+0040 in Kesteven 79: Evidence for a Strongly Magnetized Neutron Star
• A non-pulsating neutron star in the supernova remnant HESS J1731-347 / G353.6-0.7 with a carbon atmosphere
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• Detailed X-Ray Mapping of the Shocked Ejecta and Circumstellar Medium in the Galactic Core-Collapse Supernova Remnant G292.0+1.8
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• TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae -- I. Survey description and initial discoveries
• Deep optical observations of the central X-ray source in the Puppis A supernova remnant
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