X-ray Spectroscopy of Distant Active Galactic Nuclei
, 2017 The physical structure and behaviour of stars have been studied extensively throughout centuries.In contrast, the existence of objects now known as Active Galaxies has only been established since a couple of decades. The nucleus of such an object radiates an extraordinary amount of light across the electromagnetic spectrum, sometimes outshining the ...
Börjeson, Charlie, Cohen, Julia
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X-ray reverberation in Active Galactic Nuclei
, 2016 Narrow Line Type-1 Seyfert active galaxies can exhibit a high degree of variability in the X-ray regime. This thesis examines that variability in the context of reverberation models, in which a flare in activity has an extended, energy dependent, response. A novel method is developed for estimating the response function in different energy bands.
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Connecting the X-Ray/UV Variability of Fairall 9 with NICER: A Possible Warm Corona
The Astrophysical JournalThe Seyfert 1 active galactic nucleus Fairall 9 was targeted by NICER, Swift, and ground-based observatories for a ∼1000 day long reverberation mapping campaign.
Ethan R. Partington +9 more
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Multiwavelength Polarization Observations of Mrk 501
The Astrophysical Journal LettersMrk 501 is a prototypical high-synchrotron-peaked blazar and serves as one of the primary targets for the Imaging X-ray Polarimetry Explorer (IXPE). In this study, we report X-ray polarization measurements of Mrk 501 based on six IXPE observations.
Xin-Ke Hu +20 more
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Correlations of the IR Luminosity and Eddington Ratio with a Hard X-Ray-Selected Sample of Active Galactic Nuclei [PDF]
, 2008 Richard F. Mushotzy +3 more
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A Large Population of Luminous Active Galactic Nuclei Lacking X-Ray Detections: Evidence for Heavy Obscuration? [PDF]
, 2021 Christopher M. Carroll +7 more
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CHANDRAX-RAY ANDHUBBLE SPACE TELESCOPEIMAGING OF OPTICALLY SELECTED KILOPARSEC-SCALE BINARY ACTIVE GALACTIC NUCLEI. I. NATURE OF THE NUCLEAR IONIZING SOURCES [PDF]
, 2012 Xin Liu +5 more
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Optical characteristics of young quasars as sources of the cosmic X-ray background [PDF]
The sources which dominate the thermal cosmic X-ray background cannot have X-ray spectra similar to the power laws measured for bright active galactic nuclei.
Boldt, E., Leiter, D.
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Application of an X-Ray Clumpy Torus Model (XCLUMPY) to 10 Obscured Active Galactic Nuclei Observed with Suzaku and NuSTAR [PDF]
, 2020 Atsushi Tanimoto +6 more
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Energetic spectra from semi-implicit particle-in-cell simulations of magnetic reconnection. [PDF]
Sci RepSchoeffler KM +4 more
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