The Search for Binary Supermassive Black Holes among Quasars with Offset Broad Lines Using the Very Long Baseline Array [PDF]
Astrophysical Journal, 2021 In several previous studies, quasars exhibiting broad emission lines with ≳1000 km s−1 velocity offsets with respect to the host galaxy rest frame have been discovered.
Peter Breiding +6 more
semanticscholar +1 more source
Comments on Gott and Gunn's solution of double quasars
The Astrophysical Journal, 1975 J. Barnothy
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An improved test of the binary black hole hypothesis for quasars with double-peaked broad Balmer lines [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Velocity offsets in the broad Balmer lines of quasars and their temporal variations serve as indirect evidence for bound supermassive black hole binaries (SBHBs) at sub-parsec separations.
Anh Doan +5 more
semanticscholar +1 more source
Newly discovered $z\sim5$ quasars based on deep learning and Bayesian information criterion [PDF]
, 2022 We report the discovery of four quasars with $M_{1450} \gtrsim -25.0$ mag at $z\sim5$ and supermassive black hole mass measurement for one of the quasars.
Suhyun Shin +3 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 Dual and off-nucleus active supermassive black holes are expected to be common in the hierarchical structure formation paradigm, but their identification at parsec scales remains a challenge due to strict angular resolution requirements.
Yu-Ching Chen +7 more
doaj +1 more source
Blueshifted Fe ii and Balmer Broad Emission lines in a Reddened Quasar
The Astrophysical Journal, 2023 We present detailed analysis of the optical and near-infrared spectrum of the reddened radio-loud quasar F2M J154043.74+492323.9 with strong optical Fe ii emission of ${R}_{4570}\equiv \tfrac{\mathrm{Fe}\,{\rm\small{II}}\lambda \lambda \,4434,4684}{{\rm ...
Yipeng Zhou +3 more
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Spectroscopy of the double quasars Q1343+266A, B: A new determination of the size of Lyman-alpha forest absorbers [PDF]
, 1994 We have obtained spectroscopy of Q 1343+266 AB, a pair of quasars at redshift z = 2.03 with a projected separation of 9.5 arcseconds. This system is well-suited for probing the Ly-alpha forest, since the two component spectra show several Ly-alpha lines ...
J. Bechtold +2 more
semanticscholar +1 more source
The Pan-STARRS1 z > 5.6 Quasar Survey. III. The z ≈ 6 Quasar Luminosity Function
The Astrophysical Journal, 2023 We present the z ≈ 6 type-1 quasar luminosity function (QLF), based on the Pan-STARRS1 (PS1) quasar survey. The PS1 sample includes 125 quasars at z ≈ 5.7–6.2, with −28 ≲ M _1450 ≲ −25.
Jan-Torge Schindler +11 more
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Pictor A: A new double-peaked emission-line quasar [PDF]
The Astrophysical Journal, 1995 uu-encoded compressed tar of postscript files.
Sulentic, J. W. +3 more
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Radio variability in the nuclei of double radio galaxies and quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 1980 R. G. Hine, P. A. G. Scheuer
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