Results 131 to 140 of about 183 (149)
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Radio Loud Quasars at High Redshift
1998We present results from an observational investigation into the evolution of the luminosity function of flat spectrum radio loud quasars based on a new survey for radio loud quasars with z>3. Rather than carry out an indiscriminate redshift campaign on all the radio sources in our sample, we use optical colours to preselect red stellar identifications ...
R. G. Mcmahon, I. M. Hook
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The Nature of Radio‐Intermediate Quasars: What Is Radio‐loud and What Is Radio‐quiet? [PDF]
Astrophysical Journal, 1996 We have performed quasi-simultaneous radio flux density measurements at 2.7 and 10 GHz for all PG quasars with radio flux densities between 4-200 mJy. We find that a large fraction of these sources are variable, flat-spectrum quasars. This brings the total fraction of flat-spectrum quasars with a ratio between radio and optical flux of R>10 - a ...
Heino Falcke
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X-ray properties of high-redshift Radio Loud and Radio Quiet Quasars observed by Chandra
Journal of High Energy Astrophysics, 2022Fatma Shaban
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The radio spectral turnover of radio-loud quasars at z > 5
Astronomy and Astrophysics, 2022Karl Menten +2 more
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Merger Signatures in Radio Loud and Radio Quiet Quasars
Acta Astronomica, 2020Garofalo, D., Webster, B., Bishop, K.
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No strong radio absorption detected in the low-frequency spectra of radio-loud quasars at z > 5.6
Astronomy and Astrophysics, 2023Aayush Saxena +2 more
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Blazar nature of high-z radio-loud quasars
Astronomy and Astrophysics, 2022Giancarlo Ghirlanda +2 more
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Observations by GMRT at 323 MHz of radio-loud quasars atz > 5
Astronomy and Astrophysics, 2020Karl Menten +2 more
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The radio properties of a sample of optically selected radio-loud quasars
Chinese Astronomy and Astrophysics, 1999Xiang-Tao He
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Discovery of radio-loud quasars with z=4.72 and z=4.010
Monthly Notices of the Royal Astronomical Society, 1998Isobel Hook +2 more
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