Discovery of Candidate X-ray Jets in High-Redshift Quasars

Abstract

We present Chandra X-ray observations of 14 radio-loud quasars at redshifts $3<z<4$, selected from a well-defined sample. All quasars are detected in the 0.5-7.0 keV energy band, and resolved X-ray features are detected in five of the objects at distances of 1-12" from the quasar core. The X-ray features are spatially coincident with known radio features for four of the five quasars. This indicates that these systems contain X-ray jets. X-ray fluxes and luminosities are measured, and jet-to-core X-ray flux ratios are estimated. The flux ratios are consistent with those observed for nearby jet systems, suggesting that the observed X-ray emission mechanism is independent of redshift. For quasars with undetected jets, an upper limit on the average X-ray jet intensity is estimated using a stacked image analysis. Emission spectra of the quasar cores are extracted and modeled to obtain best-fit photon indices, and an Fe K emission line is detected from one quasar in our sample. We compare X-ray spectral properties with optical and radio emission in the context of both our sample and other quasar surveys.

arXiv commentAccepted to ApJ, 15 pages, 7 figures, 7 tables

References in corpus (64)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Observational Evidence of AGN Feedback
• Heating Hot Atmospheres with Active Galactic Nuclei
• The Pan-STARRS1 Photometric System
• The First Data Release of the Sloan Digital Sky Survey
• A Systematic Study of Radio-Induced X-ray Cavities in Clusters, Groups, and Galaxies
• The Feedback-Regulated Growth of Black Holes and Bulges through Gas Accretion and Starbursts in Cluster Central Dominant Galaxies
• The X-ray-to-Optical Properties of Optically-Selected Active Galaxies Over Wide Luminosity and Redshift Ranges
• The Chandra COSMOS Legacy survey: overview and point source catalog
• Sherpa: a Mission-Independent Data Analysis Application
• The Sloan Digital Sky Survey Quasar Catalog: Fourteenth Data Release
• The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
• The X-Ray Jet of PKS 0637-752: Inverse Compton Radiation from the Cosmic Microwave Background ?
• Large scale jets in AGN: multiwavelength mapping
• A High Resolution X-ray Image of the Jet in M 87
• The tight relation between X-ray and ultraviolet luminosity of quasars
• Spectral properties of quasars from Sloan Digital Sky Survey data release 14: The catalog
• On the Momentum Diffusion of Radiating Ultrarelativistic Electrons in a Turbulent Magnetic Field
• X-ray Signatures of Evolving Radio Galaxies
• The Outburst of HST-1 in the M87 Jet
• Shocks and sonic booms in the intracluster medium: X-ray shells and radio galaxy activity
• Chandra Observations of the Highest Redshift Quasars from the Sloan Digital Sky Survey
• New Chandra observations of the jet in 3C273. I. Softer X-ray than radio spectra and the X-ray emission mechanism
• The X-ray Jets of Active Galaxies
• Chandra Discovery of a 300 kpc X-ray Jet in the GPS Quasar PKS1127-145
• A Northern Survey of Gamma-Ray Blazar Candidates
• The X-ray properties of $z>6$ quasars: no evident evolution of accretion physics in the first Gyr of the Universe
• The X-ray properties of z$\sim$6 luminous quasars
• The WISSH Quasars Project III. X-ray properties of hyper-luminous quasars
• The 300 kpc Long X-ray Jet in PKS 1127-145, z=1.18 Quasar: Constraining X-ray Emission Models
• Chandra and XMM-Newton observations of the first quasars: X-rays from the age of cosmic enlightenment
• On Computing Upper Limits to Source Intensities
• Ruling out IC/CMB X-rays in PKS 0637-752 and the Implications for TeV Emission from Large-Scale Quasar Jets
• An X-ray jet discovered by Chandra in the z=4.3 radio-selected quasar GB 1508+5714
• Evolution of the X-ray Emission of Radio-Quiet Quasars
• Polarimetry and the High-Energy Emission Mechanisms in Quasar Jets. The Case of PKS 1136-135
• Long Term Monitoring of the Dynamics and Particle Acceleration of Knots in the Jet of Centaurus A
• An X-ray Imaging Survey of Quasar Jets -- Testing the Inverse Compton Model
• Fermi non-detections of four X-ray jet sources and implications for the IC/CMB mechanism
• An X-ray and Multiwavelength Survey of Highly Radio-Loud Quasars at z > 4: Jet-Linked Emission in the Brightest Radio Beacons of the Early Universe
• X-ray properties of the Youngest Radio Sources and their Environments
• Observations of Magnetic Fields and Relativistic Beaming in Four Quasar Jets
• Variability and Proper Motion of X-ray Knots in the Jet of Centaurus A
• Detection of Superluminal Motion in the X-Ray Jet of M87
• Where Centaurus A gets its X-ray knottiness
• An X-ray Imaging Survey of Quasar Jets -- The Complete Survey
• Radio Identification of the X-ray Jet in the z=4.3 Quasar GB 1508+5714
• Serendipitous discovery of an extended X-ray jet without a radio counterpart in a high-redshift quasar
• Investigating the X-ray enhancements of highly radio-loud quasars at z > 4
• Detecting Relativistic X-ray Jets in High-Redshift Quasars
• Discovery of a Kiloparsec Scale X-ray/Radio Jet in the z=4.72 Quasar GB 1428+4217
• A Chandra Search for X-Ray Jets in Redshift 6 Quasars
• Inverse-Compton scattering in the resolved jet of the high-redshift quasar PKS J1421-0643
• Confronting X-ray Emission Models with the Highest-Redshift Kiloparsec-scale Jets: the z=3.89 Jet in Quasar 1745+624
• New ALMA and Fermi/LAT Observations of the large-scale jet of PKS 0637-752 Strengthen the Case Against the IC/CMB Model
• The Spectacular Radio-Near-IR-X-ray Jet of 3C 111: X-ray Emission Mechanism and Jet Kinematics
• Discovery of an X-ray Jet and Extended Jet Structure in the Quasar PKS 1055+201
• Two Candidate High-Redshift X-ray Jets Without Coincident Radio Jets
• Examining High Energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets
• Dissecting the complex environment of a distant quasar with MUSE
• X-ray Properties of Young Radio Quasars at z > 4.5
• Revisiting the EC/CMB model for extragalactic large scale jets
• VLA Observations of a Complete Sample of Radio Loud Quasars between redshifts 2.5 and 5.28: I. high-redshift sample summary and the radio images

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