activity
20112026
most citedThe NANOGrav 15-year Data Set: Constraints on Supermassive Black Hole Binaries from the Gravitational Wave Background

380 citations · 4.4k across the 111 of their papers we have counts for

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astro-ph.GA2026

Are Broad Mg II Galaxies Fading AGN?

Stephanie M. LaMassa, Michael Eracleous, Jessie Runnoe +2

We analyzed a sample of 494 galaxies from the Sloan Digital Sky Survey (SDSS) I-IV that have unusual properties. They display broadened Mg II 2798 line emission, as would be exp…

astro-ph.GA2026★ 1 cited

A New Member of the Fast and Furious Family: A Relativistic and Time-Variable UV Outflow in a Luminous Quasar

Lucas M. Seaton, Patrick B. Hall, Liliana Flores +20

We report the fastest quasar outflow first detected in the ultraviolet, via variable C IV and Si IV absorption at outflow velocities km s to at least km…

astro-ph.GA2026

Prospects of resolving and localising individual supermassive black hole binaries with pulsar timing arrays: the host ranking challenge

Niccolò Veronesi, Maria Charisi, Polina Petrov +5

Pulsar Timing Arrays (PTAs) are soon expected to detect individually resolved supermassive black hole (SMBH) binaries, opening the possibility for multi-messenger discoveries. The…

astro-ph.GA2026★ 1 cited

ReveaLLAGN 1: JWST Emission-Line Spectra Reveal Low-Luminosity AGN with UV-Deficient SEDs and Warm Molecular Gas

Kameron Goold, Anil Seth, Mallory Molina +20

We present near- and mid-infrared spectra of eight Low-Luminosity Active Galactic Nuclei (LLAGN), spanning nearly four orders of magnitude in black hole mass and Eddington ratio, o…

astro-ph.GA2025

Identification of periodicities with arbitrary shapes in AGN light curves

Lorenzo Bertassi, Maria Charisi, Riccardo Buscicchio +3

Massive black hole binaries are expected to be observable as periodic AGN in time-domain photometric surveys. Periodicities may originate from different physical processes, includi…

astro-ph.GA2025

Simulating Disky Broad Line Region Reverberation

Mary Ogborn, Michael Eracleous, Jessie C. Runnoe +3

Variability studies of the broad emission lines of Active Galactic Nuclei (AGNs) and quasars show stochastic radial velocity variations (i.e., fluctuations in the centroid of the l…