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Using Machine Learning to Link Black Hole Accretion Flows with Spatially Resolved Polarimetric Observables
Richard Qiu, Angelo Ricarte, Ramesh Narayan +3
We introduce a new library of 535,194 model images of the supermassive black holes and Event Horizon Telescope (EHT) targets Sgr A* and M87*, computed by performing general relativ…
Constraints from dwarf galaxies on black hole seeding and growth models with current and future surveys
Urmila Chadayammuri, Akos Bogdan, Angelo Ricarte +1
Dwarf galaxies are promising test beds for constraining models of supermassive and intermediate-mass black holes (MBH) via their black hole occupation fraction (BHOF). Disentanglin…
Accretion Flow Morphology in Numerical Simulations of Black Holes from the ngEHT Model Library: The Impact of Radiation Physics
Koushik Chatterjee, Andrew Chael, Paul Tiede +18
In the past few years, the Event Horizon Telescope (EHT) has provided the first-ever event horizon-scale images of the supermassive black holes (BHs) (M87*) and Sagittarius A (…
Expectations for Horizon-Scale Supermassive Black Hole Population Studies with the ngEHT
Dominic W. Pesce, Daniel C. M. Palumbo, Angelo Ricarte +5
We present estimates for the number of supermassive black holes (SMBHs) for which the next-generation Event Horizon Telescope (ngEHT) can identify the black hole ``shadow,'' along…
Tracing the hot spot motion using the next generation Event Horizon Telescope (ngEHT)
Razieh Emami, Paul Tiede, Sheperd S. Doeleman +19
We propose to trace the dynamical motion of a shearing hot spot near the SgrA* source through a dynamical image reconstruction algorithm, StarWarps. Such a hot spot may form as the…
Probing plasma composition with the next generation Event Horizon Telescope (ngEHT)
Razieh Emami, Richard Anantua, Angelo Ricarte +15
We explore the plasma matter content in the innermost accretion disk/jet in M87* as relevant for an enthusiastic search for the signatures of anti-matter in the next generation of…
Emission Modeling in the EHT-ngEHT Age
Richard Anantua, Joaquín Dúran, Nathan Ngata +9
This work proposes a methodology to test phenomenologically-motivated emission processes that account for the flux and polarization distribution and global structure of the 230 GHz…
The ngEHT's Role in Measuring Supermassive Black Hole Spins
Angelo Ricarte, Paul Tiede, Razieh Emami +2
While supermassive black hole masses have been cataloged across cosmic time, only a few dozen of them have robust spin measurements. By extending and improving the existing Event H…
How Spatially Resolved Polarimetry Informs Black Hole Accretion Flow Models
Angelo Ricarte, Michael D. Johnson, Yuri Y. Kovalev +2
The Event Horizon Telescope (EHT) Collaboration has successfully produced images of two supermassive black holes, enabling novel tests of black holes and their accretion flows on h…
Observational Signatures of Frame Dragging in Strong Gravity
Angelo Ricarte, Daniel C. M. Palumbo, Ramesh Narayan +2
Objects orbiting in the presence of a rotating massive body experience a gravitomagnetic frame-dragging effect, known as the Lense-Thirring effect, that has been experimentally con…
A vast population of wandering and merging IMBHs at cosmic noon
Tiziana Di Matteo, Yueying Ni, Nianyi Chen +5
Massive black holes in the centers of galaxies today must have grown by several orders of magnitude from seed black holes formed at early times. Detecting a population of intermedi…
Multi-frequency Black Hole Imaging for the Next-Generation Event Horizon Telescope
Andrew Chael, Sara Issaoun, Dominic W. Pesce +4
The Event Horizon Telescope (EHT) has produced images of the plasma flow around the supermassive black holes in Sgr A* and M87* with a resolution comparable to the projected size o…
Unraveling Twisty Linear Polarization Morphologies in Black Hole Images
Razieh Emami, Angelo Ricarte, George N. Wong +23
We investigate general relativistic magnetohydrodynamic simulations (GRMHD) to determine the physical origin of the twisty patterns of linear polarization seen in spatially resolve…
The Photon Ring in M87*
Avery E. Broderick, Dominic W. Pesce, Paul Tiede +48
We report measurements of the gravitationally lensed secondary image -- the first in an infinite series of so-called "photon rings" -- around the supermassive black hole M87* via s…
Resolving the inner parsec of the blazar J1924-2914 with the Event Horizon Telescope
Sara Issaoun, Maciek Wielgus, Svetlana Jorstad +27
The blazar J1924-2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic Center's black hole Sagittarius A*. Here we present the first total and linearly polari…
Millimeter light curves of Sagittarius A* observed during the 2017 Event Horizon Telescope campaign
Maciek Wielgus, Nicola Marchili, Ivan Marti-Vidal +28
The Event Horizon Telescope (EHT) observed the compact radio source, Sagittarius A* (Sgr A*), in the Galactic Center on 2017 April 5-11 in the 1.3 millimeter wavelength band. At th…
PATOKA: Simulating Electromagnetic Observables of Black Hole Accretion
George N. Wong, Ben S. Prather, Vedant Dhruv +11
The Event Horizon Telescope (EHT) has released analyses of reconstructed images of horizon-scale millimeter emission near the supermassive black hole at the center of the M87 galax…
Astrophysics with the Laser Interferometer Space Antenna
Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda +156
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many…
A hidden population of massive black holes in simulated dwarf galaxies
Ray S. Sharma, Alyson M. Brooks, Michael Tremmel +3
We explore the characteristics of actively accreting MBHs within dwarf galaxies in the \textsc{Romulus25} cosmological hydrodynamic simulation. We examine the MBH occupation fracti…
Prospects to Explore High-redshift Black Hole Formation with Multi-band Gravitational Waves Observatories
Hsin-Yu Chen, Angelo Ricarte, Fabio Pacucci
The assembly of massive black holes in the early universe remains a poorly constrained open question in astrophysics. The merger and accretion of light seeds (remnants of Populatio…
Probing Plasma Physics with Spectral Index Maps of Accreting Black Holes on Event Horizon Scales
Angelo Ricarte, Charles Gammie, Ramesh Narayan +1
The Event Horizon Telescope (EHT) collaboration has produced the first resolved images of the supermassive black holes at the centre of our galaxy and at the centre of the elliptic…