Results 101 to 110 of about 533 (185)
The Astrophysical JournalHow a seemingly “dead” host galaxy provides fuel for its active galactic nucleus (AGN) remains an unresolved problem. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we present a new high-sensitivity atomic-hydrogen (H i ...
Jin-Long Xu +6 more
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Radio Emission from High-redshift Active Galactic Nuclei in the JADES and CEERS Surveys
The Astronomical JournalRecent calculations indicate that radio emission from quasars at z ∼ 6–7 could be detected at much earlier stages of evolution, at z ∼ 14–15, by the Next-Generation Very Large Array (ngVLA) and the Square Kilometer Array (SKA).
Muhammad A. Latif +2 more
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Strongly Magnetized Accretion with Low Angular Momentum Produces a Weak Jet
The Astrophysical JournalWe study the spherical accretion of magnetized plasma with low angular momentum onto a supermassive black hole, utilizing global general relativistic magnetohydrodynamic simulations.
Alisa Galishnikova +4 more
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The optical luminosity function of quasars and low-luminosity active galactic nuclei
The Astronomical Journal, 1987 The optical luminosity function derived from quasars with M(B) less than -23 is extended to include the nuclear luminosities of Seyfert 1 galaxies. The model is fitted to the (total) luminosity data for active galaxies from a complete flux-limited survey.
openaire +1 more source
Ensemble Variability Properties of Active Galactic Nuclei in the SDSS DR17
The Astrophysical JournalWe present the results from a study of ∼9600 broadline-selected active galactic nuclei (AGNs) with host galaxies detected from the Sloan Digital Sky Survey (SDSS) Data Release 17.
Krittapas Chanchaiworawit +1 more
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The Astrophysical JournalDisk continuum reverberation mapping is one of the primary ways we learn about active galactic nuclei (AGN) accretion disks. Reverberation mapping assumes that time-varying X-rays incident on the accretion disk drive variability in UV–optical light ...
Amy Secunda +2 more
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A CIGALE module tailored (not only) for low-luminosity active galactic nuclei
Astronomy & AstrophysicsThe spectral energy distribution (SED) of low-luminosity active galactic nuclei (LLAGN) presents unique challenges as the emission from these objects is comparable to the radiation from their host galaxy and the accretion physics involved is particularly complex.
I. E. López +19 more
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Observational Evidence for Hot Wind Impact on Parsec Scales in Low-luminosity Active Galactic Nuclei
The Astrophysical JournalSupermassive black holes in galaxies spend the majority of their lifetime in the low-luminosity regime, powered by hot accretion flow. Strong winds launched from the hot accretion flow have the potential to play an important role in active galactic ...
Fangzheng Shi +4 more
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The Astrophysical JournalWe present near- and mid-infrared spectra of eight low-luminosity active galactic nuclei (LLAGN), spanning nearly 4 orders of magnitude in black hole mass and Eddington ratio, obtained with JWST/NIRSpec and MIRI as part of the ReveaLLAGN program, along ...
Kameron Goold +23 more
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The Astrophysical JournalRadio galaxies are a subclass of active galactic nuclei that drive relativistic jets from their center and are observed in radio to very-high-energy gamma rays. The emission mechanisms and regions are still unknown.
Riku Kuze, Shigeo S. Kimura, Kenji Toma
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