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26 papers · 1 filter
Searching for unresolved massive black hole pairs through AGN photometric variability
Lorenzo Bertassi, Maria Charisi, Fabio Rigamonti +2
Since their discovery, AGN light curves are known to be intrinsically variable. In the optical/UV band, this variability is consistent with correlated or red noise and is particula…
Gravitational Wave Measurement of the - Intrinsic Scatter at High Redshift
Cayenne Matt, Kayhan Gültekin, Gabriella Agazie +109
The observed GWB spectrum is higher in amplitude than model predictions by a factor of 2-3. Using a semi-analytic model, we evaluate the effect of a high-scatter supermassive black…
The Host Galaxies of PTA Sources: Converting Supermassive BH Binary Parameters into EM Observables
Niccolo Veronesi, Maria Charisi, Stephen R Taylor +2
Pulsar timing arrays (PTAs) are approaching the sensitivity required to resolve gravitational waves (GWs) from individual supermassive black hole (SMBH) binaries. However, the larg…
A two-step strategy to identify episodic sources of gravitational waves and high energy neutrinos in starburst galaxies
M. L. Allen, P. L. Biermann, L. I. Caramete +12
Supermassive black hole mergers with spin-flips accelerate energetic particles through their precessing relativistic jets, producing high energy neutrinos and finally gravitational…
Insights into Supermassive Black Hole Mergers from the Gravitational Wave Background
C. M. F. Mingarelli, L. Blecha, T. Bogdanović +9
At the Kavli Institute for Theoretical Physics, participants of the rapid response workshop on the gravitational wave background explored discrepancies between experimental results…
Intermediate-mass black holes and the fundamental plane of black hole accretion
Kayhan Gültekin, Kristina Nyland, Nichole Gray +7
We present new 5 GHz VLA observations of a sample of 8 active intermediate-mass black holes with masses found in galaxies with stellar masses $…