Results 161 to 170 of about 719 (181)
Radio spectra and polarization properties of radio-loud broad absorption-line quasars [PDF]
, 2008 F. M. Montenegro‐Montes +7 more
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Clues from microquasars to the origin of radio-loudness of quasars [PDF]
, 2006 Carlo Nipoti +2 more
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Relativistic jet motion in the core of the radio-loud quasar J1101+7225
, 2005 Jörg‐Uwe Pott +6 more
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Correlation of Ultra High Energy Cosmic Rays with Compact Radio Loud Quasars
, 2000 Amitabh Virmani +5 more
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Radio Variability of Radio‐quiet and Radio‐loud Quasars [PDF]
Astrophysical Journal, 2005 The majority of quasars are weak in their radio emission, with flux densities comparable to those in the optical, and energies far lower. A small fraction, about 10%, are hundreds to thousands of times stronger in the radio. Conventional wisdom holds that there are two classes of quasars, the radio quiets and radio louds, with a deficit of sources ...
Richard Barvainis +2 more
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Radio-loud and radio-quiet quasars observed by EXOSAT [PDF]
Monthly Notices of the Royal Astronomical Society, 1992 We present results from the spectral analysis of EXOSAT data on 31 quasars, 18 radio-loud and 13 radio-quiet. Simple power-law models with fixed (Galactic) absorption give acceptable fits to the spectra obtained in the 2-10 keV band. Using the results from these fits we have compared the distributions of spectral indices α for the radio-loud and radio ...
M J L Turner, G C Stewart, R D Saxton
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Broad absorption line variability in radio-loud quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We investigate C IV broad absorption line (BAL) variability within a sample of 46 radio-loud quasars (RLQs), selected from SDSS/FIRST data to include both core-dominated (39) and lobe-dominated (7) objects. The sample consists primarily of high-ionization BAL quasars, and a substantial fraction have large BAL velocities or equivalent widths; their ...
B P Miller, W N Brandt, R R Gibson
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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 ...
H Falcke
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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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