Hundreds of Low-mass Active Galaxies in the Galaxy And Mass Assembly (GAMA) Survey [PDF]
Astrophysical Journal, 2022 We present an entirely new sample of 388 low-mass galaxies (M ⋆ ≤ 1010 M ⊙) that have spectroscopic signatures indicating the presence of massive black holes (BHs) in the form of active galactic nuclei (AGNs) or tidal disruption events. Of these, 70 have
Sheyda Salehirad, A. Reines, M. Molina
semanticscholar +1 more source
Hidden Hearts of Neutrino Active Galaxies [PDF]
Astrophysical Journal Letters, 2022 Recent multimessenger studies have provided evidence for high-energy neutrino sources that are opaque to GeV–TeV gamma rays. We present model-independent studies on the connection between neutrinos and gamma rays in the active galaxy NGC 1068, and find ...
K. Murase
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A Local Baseline of the Black Hole Mass Scaling Relations for Active Galaxies. IV. Correlations Between M BH and Host Galaxy σ, Stellar Mass, and Luminosity [PDF]
Astrophysical Journal, 2021 The tight correlations between the mass of supermassive black holes (M BH) and their host-galaxy properties have been of great interest to the astrophysical community, but a clear understanding of their origin and fundamental drivers still eludes us. The
V. Bennert +8 more
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Gas filaments of the cosmic web located around active galaxies in a protocluster [PDF]
Science, 2019 Glowing filaments of the cosmic web Most gas in the Universe lies in the intergalactic medium, where it forms into sheets and filaments of the cosmic web.
H. Umehata +19 more
semanticscholar +1 more source
Constraining the photon coupling of ultra-light dark-matter axion-like particles by polarization variations of parsec-scale jets in active galaxies [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 Dark matter may consist of axion-like particles with ultra-low masses. Two-photon interactions of these particles affect the polarization of radiation propagating through the dark matter.
M. Ivanov +12 more
semanticscholar +1 more source
The Mass–Metallicity Relation of Local Active Galaxies [PDF]
Astrophysical Journal, 2019 We systematically measure the gas-phase metallicities and the mass–metallicity relation of a large sample of local active galaxies for the first time. Observed emission-line fluxes from the Sloan Digital Sky Survey are compared to a four-dimensional grid
A. D. Thomas +5 more
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A New Method to Measure Star Formation Rates in Active Galaxies Using Mid-infrared Neon Emission Lines [PDF]
Astrophysical Journal, 2019 The star formation rate (SFR) is one of the most fundamental parameters of galaxies, but nearly all of the standard SFR diagnostics are difficult to measure in active galaxies because of contamination from the active galactic nucleus (AGN).
Ming-Yang Zhuang, L. Ho, J. Shangguan
semanticscholar +1 more source
Reionization with galaxies and active galactic nuclei [PDF]
Monthly notices of the Royal Astronomical Society, 2020 In this work we investigate the properties of the sources that reionized the intergalactic medium (IGM) in the high-redshift Universe. Using a semi-analytical model aimed at reproducing galaxies and black holes in the first ∼1.5 Gyr of the Universe, we
P. Dayal +8 more
semanticscholar +1 more source
Evidence for a Young Stellar Population in Nearby Type 1 Active Galaxies [PDF]
Astrophysical Journal, 2019 To understand the physical origin of the close connection between supermassive black holes (BHs) and their host galaxies, it is vital to investigate star formation properties in active galaxies.
Minjin Kim, L. Ho
semanticscholar +1 more source
Starburst99: Synthesis Models for Galaxies with Active Star Formation [PDF]
, 1999 Starburst99 is a comprehensive set of model predictions for spectrophotometric and related properties of galaxies with active star formation. The models are an improved and extended version of the data set previously published by Leitherer & Heckman.
C. Leitherer +8 more
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