Results 121 to 130 of about 20,438 (217)
Estimating Bolometric Luminosities of Type 1 Quasars with Self-organizing Maps
The Astrophysical JournalWe present a new method to calculate bolometric luminosities for unobscured, type 1 quasars with multiband photometric data. Bolometric luminosity is a fundamental property for understanding quasars, and it is commonly estimated from monochromatic ...
Jie Chen +4 more
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An Electrodynamic Model of Radio Galaxies and Quasars [PDF]
, 1970 J. H. Piddington
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Author Correction: QuasAr Odyssey: the origin of fluorescence and its voltage sensitivity in microbial rhodopsins. [PDF]
Nat Commun, 2022 Silapetere A +16 more
europepmc +1 more source
Periodicity and Luminosity of the ‘Pulsar’ Model of Quasars [PDF]
, 1971 William A. Fowler
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The Astrophysical JournalWe present photometric selection of type 1 quasars in the ≈5.3 deg ^2 XMM-Large Scale Structure survey field with machine learning. We constructed our training and blind-test samples using spectroscopically identified Sloan Digital Sky Survey quasars ...
Jian Huang +6 more
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Quasars Can Signpost Supermassive Black Hole Binaries
The Astrophysical JournalSupermassive black holes (SMBHs) are found in the centers of massive galaxies, and galaxy mergers should eventually lead to SMBH mergers. Quasar activity has long been associated with galaxy mergers, so here we investigate if supermassive black hole ...
J. Andrew Casey-Clyde +5 more
doaj +1 more source
Long-time-scale optical variability in quasars [PDF]
, 1976 Timothy M. Heckman
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Pushing the limits of detectability: mixed dark matter from strong gravitational lenses. [PDF]
Mon Not R Astron Soc, 2023 Keeley RE +5 more
europepmc +1 more source