Evidence for a moderate spin from X-ray reflection of the high-mass supermassive black hole in the cluster-hosted quasar H1821+643

  title={Evidence for a moderate spin from X-ray reflection of the high-mass supermassive black hole in the cluster-hosted quasar H1821+643},
  author={J'ulia Sisk-Reyn'es and Christopher S. Reynolds and James H. Matthews and Robyn Smith},
  journal={Monthly Notices of the Royal Astronomical Society},
We present an analysis of deep Chandra Low-Energy and High-Energy Transmission Grating archival observations of the extraordinarily luminous radio-quiet quasar H1821+643, hosted by a rich and massive cool-core cluster at redshift z = 0.3. These data sets provide high-resolution spectra of the AGN at two epochs, free from contamination by the intracluster medium and from the effects of photon pile-up, providing a sensitive probe of the iron-K band. At both epochs, the spectrum is well… 

Figures and Tables from this paper


The Distribution and Cosmic Evolution of Massive Black Hole Spins
We study the expected distribution of massive black hole (MBH) spins and its evolution with cosmic time in the context of hierarchical galaxy formation theories. Our model uses Monte Carlo
A Chandra HETG Observation of the Quasar H 1821+643 and Its Surrounding Cluster
We present the high-resolution X-ray spectrum of the low-redshift quasar H 1821+643 and its surrounding hot cluster observed with the Chandra High Energy Transmission Grating Spectrometer (HETGS). An
The X-ray luminous cluster underlying the bright radio-quiet quasar H1821+643
We present a Chandra observation of the only low redshift, z = 0.299, galaxy cluster to contain a highly luminous radio-quiet quasar, H1821+643. By simulating the quasar point spread function, we
L5–L8 BonafedeA., et al., 2014,MonthlyNotices of the RoyalAstronomical
  • Astronomical Society,
  • 2021
New constraints on light Axion-Like Particles using Chandra Transmission Grating Spectroscopy of the powerful cluster-hosted quasar H1821+643
Axion-Like Particles (ALPs) are predicted by several Beyond the Standard Model theories, in particular, string theory. In the presence of an external magnetic field perpendicular to the direction of
Towards Precision Measurements of Accreting Black Holes Using X-Ray Reflection Spectroscopy
Relativistic reflection features are commonly observed in the X-ray spectra of accreting black holes. In the presence of high quality data and with the correct astrophysical model, X-ray reflection
The ultraviolet spectrum and continuum energy distribution of the bright quasar H1821 + 643
The first UV observations of the bright QSO H1821 + 643 are reported. With V = 14.2 mag and z = 0.297, H1821 + 643 is the second brightest object in the sky at z above 0.1. The IUE data are combined
X-ray continuum and evidence for an iron emission line from the quasar E1821 + 643
This paper reports on the 2-10 keV spectrum of the quasar E1821 + 643, obtained with the large-area proportional counters aboard the Ginga spacecraft on two occasions: May 12-14, 1987 and September
Active Galactic Nucleus Black Hole Masses and Bolometric Luminosities
Black hole mass, along with mass accretion rate, is a fundamental property of active galactic nuclei (AGNs). Black hole mass sets an approximate upper limit to AGN energetics via the Eddington limit.
X‐ray spectra of a large sample of quasars with ASCA
The results from an X-ray spectral analysis of a large sample of quasars, observed with ASCA, are presented. The sample was selected to include all ASCA observations of quasars, with z>0.05 and MV 99