A kinematic study of central compact objects and their host supernova remnants

Abstract

Context. Central compact objects (CCOs) are a peculiar class of neutron stars, primarily encountered close to the center of young supernova remnants (SNRs) and characterized by thermal X-ray emission. Aims. Our goal is to perform a systematic study of the proper motion of all known CCOs with appropriate data available. In addition, we aim to measure the expansion of three SNRs within our sample to obtain a direct handle on their kinematics and age. Methods. We analyze multiple archival Chandra data sets, consisting of HRC and ACIS observations separated by temporal baselines between 8 and 15 years. In order to correct for systematic astrometric uncertainties, we establish a reference frame using X-ray detected sources in Gaia DR2, to provide accurate proper motion estimates for our target CCOs. Complementarily, we use our coaligned data sets to trace the expansion of three SNRs by directly measuring the spatial offset of various filaments and ejecta clumps between different epochs. Results. In total, we present new proper motion measurements for six CCOs, among which we do not find any indication of a hypervelocity object. We tentatively identify direct signatures of expansion for the SNRs G15.9+0.2 and Kes 79, at estimated significance of $2.5\sigma$ and $2\sigma$, respectively. Moreover, we confirm recent results by Borkowski et al., measuring the rapid expansion of G350.1$-$0.3 at almost $6000\mathrm{km}{\mathrm{s}}^{-1}$, which places its maximal age at $600-700$ years. The observed expansion, combined with the rather small proper motion of its CCO, implies the need for a very inhomogeneous circumstellar medium to explain the highly asymmetric appearance of the SNR. Finally, for the SNR RX J1713.7$-$3946, we combine previously published expansion measurements with our measurement of the CCO's proper motion to obtain a constraining upper limit of $1700$ years on the system's age.

22+8 pages, 16+3 figures. Accepted for publication in Astronomy & Astrophysics

References in corpus (31)

• Array Programming with NumPy
• The Gaia mission
• A statistical test for Nested Sampling algorithms
• The observed velocity distribution of young pulsars
• Neutron star kicks by the gravitational tug-boat mechanism in asymmetric supernova explosions: progenitor and explosion dependence
• Central Compact Objects in Supernova Remnants
• On the Expansion Rate, Age, and Distance of the Supernova Remnant G266.2-1.2 (Vela Jr.)
• Discovery of the radio and X-ray counterpart of TeV Gamma-ray source HESS J1731-347
• Comparing Neutron Star Kicks to Supernova Remnant Asymmetries
• The Kinematics of Kepler's Supernova Remnant as revealed by Chandra
• Direct Measurement of Neutron-Star Recoil in the Oxygen-Rich Supernova Remnant Puppis A
• Small-Scale X-ray Variability in the Cassiopeia A Supernova Remnant
• The (Re-)Discovery of G350.1-0.3: A Young, Luminous Supernova Remnant and Its Neutron Star
• Modeling the X-rays from the Central Compact Object PSR J1852+0040 in Kesteven 79: Evidence for a Strongly Magnetized Neutron Star
• A New Young Galactic Supernova Remnant Containing a Compact Object: G15.9+0.2
• A high resolution HI study towards the supernova remnant Puppis A and its environments
• Probing the Proper Motion of the Central Compact Object in Puppis-A with the Chandra High Resolution Camera
• Powering Central Compact Objects with a Tangled Crustal Magnetic Field
• Multi-wavelength study of the supernova remnant Kes 79 (G33.6+0.1): On its supernova properties and expansion into a molecular environment
• Expansion measurement of Supernova Remnant RX J1713.7-3946
• Probing The Local Environment of the Supernova Remnant HESS J1731-347 with CO and CS Observations
• The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A, Revisited
• Nonuniform Expansion of the Youngest Galactic Supernova Remnant G1.9+0.3
• Expansion and Age of the X-ray Synchrotron-Dominated Supernova Remnant G330.2+1.0
• Shock-Cloud Interaction in the Southwestern Rim of RX J1713.7$-$3946 Evidenced by Chandra X-ray Observations
• Optical and Infrared Observations of the X-ray source 1WGA J1713.4$-$3949 in the G347.3-0.5 SNR
• The Expansion of the Forward Shock of 1E 0102.2-7219 in X-rays
• VLT observations of the Central Compact Object in the Vela Jr. supernova remnant
• Expansion and Age of the Supernova Remnant G350.1-0.3: High-Velocity Iron Ejecta from a Core-Collapse Event
• Fe K and ejecta emission in SNR G15.9+0.2 with XMM-Newton
• The nature of the infrared counterpart and of the optical nebula associated with the Central Compact Object in Vela Jr.\

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