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NuSTAR Observations of Candidate Subparsec Binary Supermassive Black HolesEmbargoed
May 29, 2024
Daniel Stern, 2024, "NuSTAR Observations of Candidate Subparsec Binary Supermassive Black Holes", https://doi.org/10.48577/jpl.NQJCVA, Astrophysical Journal, JPL Open Repository
We present analysis of NuSTAR X-ray observations of three AGN that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey based on apparent periodicity in their optical light curves. Simulations predict that...
The High Energy X-ray Probe (HEX-P): The Circum-nuclear Environment of Growing Supermassive Black HolesEmbargoed
Feb 26, 2024
Daniel Stern, 2024, "The High Energy X-ray Probe (HEX-P): The Circum-nuclear Environment of Growing Supermassive Black Holes", https://doi.org/10.48577/jpl.SVQS4M, Frontiers in Astronomy and Space Sciences, JPL Open Repository
Ever since the discovery of the first Active Galactic Nuclei (AGN), substantial observational and theoretical effort has been invested into understanding how massive black holes have evolved across cosmic time. Circum-nuclear obscuration is now established as a crucial component,...
The High Energy X-ray Probe (HEX-P): Bringing the Cosmic X-ray Background into FocusEmbargoed
Feb 26, 2024
Daniel Stern, 2024, "The High Energy X-ray Probe (HEX-P): Bringing the Cosmic X-ray Background into Focus", https://doi.org/10.48577/jpl.BXFC99, Frontiers of Astronomy and Space Sciences, JPL Open Repository
Since the discovery of the cosmic X-ray background (CXB), astronomers have strived to understand the accreting supermassive black holes (SMBHs) contributing to its peak in the 10--40 keV band. Existing soft X-ray telescopes could study this population up to only 10 keV, and, whil...
The High Energy X-ray Probe (HEX-P): Constraining Supermassive Black Hole Growth with Population Spin MeasurementsEmbargoed
Feb 20, 2024
Daniel Stern, 2024, "The High Energy X-ray Probe (HEX-P): Constraining Supermassive Black Hole Growth with Population Spin Measurements", https://doi.org/10.48577/jpl.WMOYEB, Frontiers in Astronomy and Space Sciences, JPL Open Repository
Constraining the primary growth channel of supermassive black holes (SMBH) remains one the most actively debated questions in the context of cosmological structure formation. Owing to the expected connection between SMBH spin parameter evolution and the accretion and merger histo...
The High Energy X-ray Probe (HEX-P): The Future of Hard X-ray Dual AGN ScienceEmbargoed
Feb 2, 2024
Daniel Stern, 2024, "The High Energy X-ray Probe (HEX-P): The Future of Hard X-ray Dual AGN Science", https://doi.org/10.48577/jpl.3AJU3R, Frontiers in Astronomy and Space Sciences, JPL Open Repository
A fundamental goal of modern-day astrophysics is to understand the connection between supermassive black hole (SMBH) growth and galaxy evolution. Merging galaxies offer one of the most dramatic channels for galaxy evolution known, capable of driving inflows of gas into galactic n...
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