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SMBH Seeds: Model Discrimination with High Energy Emission Based on Scaling Relation Evolution
Sagi Ben-Ami, Alexey Vikhlinin, Abraham Loeb
We explore the expected X-ray (0.5-2keV) signatures from super massive black holes (SMBHs) at high redshifts () assuming various models for their seeding mechanism and e…
Repeated Imaging of Massive Black Hole Binary Orbits with Millimeter Interferometry: measuring black hole masses and the Hubble constant
Daniel J. D'Orazio, Abraham Loeb
Very long baseline interferometry (VLBI) at millimeter (mm) wavelengths is being employed to resolve event-horizon scale structure of the environment surrounding the Milky-Way blac…
A Fast Radio Burst Occurs Every Second throughout the Observable Universe
Anastasia Fialkov, Abraham Loeb
Recent multi-telescope observations of the repeating Fast Radio Burst FRB 121102 reveal a Gaussian-like spectral profile and associate the event with a dwarf metal-poor galaxy at a…
A Single Progenitor Model for GW150914 and GW170104
Daniel J. D'Orazio, Abraham Loeb
The merger of stellar-mass black holes (BHs) is not expected to generate detectable electromagnetic (EM) emission. However, the gravitational wave (GW) events GW150914 and GW170104…
Hunting Black Holes with Gaia
Natalie Mashian, Abraham Loeb
We predict the number of black holes with stellar companions that are potentially detectable with Gaia astrometry over the course of its five-year mission. Our model estimates that…
Constraining Relativistic Generalizations of Modified Newtonian Dynamics with Gravitational Waves
Paul M. Chesler, Abraham Loeb
In the weak-field limit of General Relativity, gravitational waves obey linear equations and propagate at the speed of light. These properties of General Relativity are supported b…
Fast Radio Bursts from Extragalactic Light Sails
Manasvi Lingam, Abraham Loeb
We examine the possibility that Fast Radio Bursts (FRBs) originate from the activity of extragalactic civilizations. Our analysis shows that beams used for powering large light sai…
LISA Detection of Binary Black Holes in the Milky Way Galaxy
Pierre Christian, Abraham Loeb
Using the black hole merger rate inferred from LIGO, we calculate the abundance of tightly bound binary black holes in the Milky Way galaxy. Binaries with a small semimajor axis ($…