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The Chandra COSMOS Legacy Survey: Energy Spectrum of the Cosmic X-Ray Background and Constraints on Undetected Populations
Using {\em Chandra} observations in the 2.15 deg$^{2}$ COSMOS legacy field, we present one of the most accurate measurements of the Cosmic X-ray Background (CXB) spectrum to date in the [0.3-7] keV
Unveiling the first black holes with JWST: multi-wavelength spectral predictions
Growing the supermassive black holes (~10^9 Msun) that power the detected luminous, highest redshift quasars (z > 6) from light seeds - the remnants of the first stars - within ~ 1 Gyr of the Big
The observational signatures of supermassive black hole seeds
The origin and properties of the initial black hole seeds that grow to produce the observed population of accreting sources remain to be determined. It is a challenge to uniquely disentangle
Tidal disruption events by a massive black hole binary
Massive black hole binaries (MBHBs) are a natural byproduct of galaxy mergers. Previous studies have shown that flares from stellar tidal disruption events (TDEs) are modified by the presence of a
HD 61005, also known as “The Moth,” is one of only a handful of debris disks that exhibit sweptback “wings” thought to be caused by interaction with the ambient interstellar medium (ISM). We present
Introducingromulusc: a cosmological simulation of a galaxy cluster with an unprecedented resolution
We present the first results from RomulusC, the highest resolution cosmological hydrodynamic simulation of a galaxy cluster run to date. RomulusC, a zoom-in simulation of a halo with $z=0$ mass
The Event Horizon Telescope: exploring strong gravity and accretion physics
The Event Horizon Telescope (EHT), a global sub-millimeter wavelength very long baseline interferometry array, is now resolving the innermost regions around the supermassive black holes Sgr A* and
First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales. This polarized synchrotron radiation probes
The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole
Synchrotron radiation from hot gas near a black hole results in a polarized image. The image polarization is determined by effects including the orientation of the magnetic field in the emitting
Constraints on black-hole charges with the 2017 EHT observations of M87*
Prashant Kocherlakota,1 Luciano Rezzolla,1, 2, 3 Heino Falcke,4 Christian M. Fromm,5, 6, 1 Michael Kramer,7 Yosuke Mizuno,8, 9 Antonios Nathanail,9, 10 Héctor Olivares,4 Ziri Younsi,11, 9 Kazunori