Results 1 to 10 of about 122,679 (291)
, 2022 The black hole at the center of our Milky Way Galaxy -- the Galactic Black Hole, or GBH -- is a rather modest representative of its class. With a mass of 4 x 10^6 solar masses, it is well over a thousand times less massive than the most extreme ...
Mark R. Morris
semanticscholar +7 more sources
Unified Schemes for Radio-Loud Active Galactic Nuclei [PDF]
, 1995 The appearance of active galactic nuclei (AGN) depends so strongly on orientation that our current classification schemes are dominated by random pointing directions instead of more interesting physical properties.
C. M. Urry, P. Padovani
openalex +2 more sources
Spin Evolution of Stellar-mass Black Hole Binaries in Active Galactic Nuclei [PDF]
Astrophysical Journal, 2020 The astrophysical origin of gravitational-wave (GW) events is one of the most timely problems in the wake of the LIGO/Virgo discoveries. In active galactic nuclei (AGNs), binaries form and evolve efficiently by dynamical interactions and gaseous ...
H. Tagawa +3 more
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Eccentric Black Hole Mergers in Active Galactic Nuclei [PDF]
Astrophysical Journal, 2020 The astrophysical origin of gravitational wave transients is a timely open question in the wake of discoveries by the Laser Interferometer Gravitational-Wave Observatory (LIGO)/Virgo. In active galactic nuclei (AGNs), binaries form and evolve efficiently
H. Tagawa +5 more
semanticscholar +1 more source
Feedback from Active Galactic Nuclei in Galaxy Groups [PDF]
Universe, 2021 The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei ...
D. Eckert +4 more
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Mass-gap Mergers in Active Galactic Nuclei [PDF]
Astrophysical Journal, 2020 The recently discovered gravitational wave sources GW190521 and GW190814 have shown evidence of BH mergers with masses and spins outside of the range expected from isolated stellar evolution.
H. Tagawa +5 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We report on the 2019 XMM-Newton+NuSTAR monitoring campaign of the Seyfert galaxy NGC 2992, observed at one of its highest flux levels in the X-rays.
Alfredo Luminari +10 more
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The Astrophysical Journal, 2023 “Changing-look active galactic nuclei” (CLAGNs) are known to change their apparent types between types 1 and 2, usually accompanied by a drastic change in their luminosity on timescales of years.
Hirofumi Noda +13 more
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The Astrophysical Journal Supplement Series, 2022 We present the BAT AGN Spectroscopic Survey (BASS) Near-infrared Data Release 2 (DR2), a study of 168 nearby ( $\bar{z}=0.04$ , z < 0.6) active galactic nuclei (AGN) from the all-sky Swift Burst Array Telescope X-ray survey observed with the Very Large ...
Jakob S. den Brok +22 more
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Electromagnetic Signatures of Relativistic Explosions in the Disks of Active Galactic Nuclei
, 2021 The disks of active galactic nuclei (AGNs), traditionally studied as feeders of the supermassive black holes (SMBHs) at their centers, are also hosts to massive stars and hence their neutron star (NS) and black hole (BH) remnants. Migration traps and gas
R. Perna, D. Lazzati, M. Cantiello
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