Results 61 to 70 of about 183 (149)
Resolving the Powerful Radio-loud Quasar at z ∼ 6 [PDF]
The Astrophysical Journal, 2018 We present high angular resolution imaging ($23.9 \times 11.3$ mas, $138.6 \times 65.5$ pc) of the radio-loud quasar PSO~J352.4034$-$15.3373 at $z=5.84$ with the Very Long Baseline Array (VLBA) at 1.54 GHz. This quasar has the highest radio-to-optical flux density ratio at such a redshift, making it the radio-loudest source known to date at $z \sim 6$.
Emmanuel Momjian +4 more
openaire +3 more sources
Investigating Differences in the Palomar-Green Blazar Population Using Polarization
The Astrophysical JournalWe present polarization images with the Karl G. Jansky Very Large Array (VLA) in A- and B-array configurations at 6 GHz of seven radio-loud (RL) quasars and eight BL Lac objects belonging to the Palomar-Green (PG) “blazar” sample.
Janhavi Baghel +7 more
doaj +1 more source
The EMSS Radio Loud Quasar Sample
, 2000 We construct the first X-ray selected sample of radio-loud quasars from the EMSS survey. The X-ray selection allows us to explore the properties of radio-loud quasars 10-100 weaker than classical samples in the radio band. There are no radio-loud quasars whose synchrotron peak reaches the UV-soft X-ray band at these (radio) flux levels (as occurs for ...
Wolter, Anna, Celotti, Annalisa
openaire +2 more sources
Differential evolution of radio quiet and radio loud quasars
The Astronomical Journal, 1995 We have observed 40 optically selected high-redshift quasars with the Very Large Array (VLA) at 1515 MHz (20 cm). Three quasars are detected above our 3 sigma limit of 0.2 mJy. We review all available evidence on radio detections of optically selected quasars in terms of their ratio R of radio to optical luminosity.
Maarten Schmidt +3 more
openaire +1 more source
Correlation between radio and broad line emission in radio loud quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 9 pages, accepted for publication in ...
Cao, Xinwu, Jiang, D. R.
openaire +2 more sources
The Relationship between Mg ii Broad Emission and Quasar Inclination Angle
Frontiers in Astronomy and Space Sciences, 2017 Several observed spectral properties of quasars are believed to be influenced by quasar orientation. In this investigation we examine the effect of orientation on the Mg ii line located at 2,798 Å in a sample of 36 radio-loud quasars, with orientation ...
Conor Wildy, Bozena Czerny
doaj +1 more source
On the Cosmological Evolution of Radio Quiet and Radio Loud Quasars [PDF]
Symposium - International Astronomical Union, 1996 This contribution gives further insight into the problem of an ‘evolution’ of the function G(> R) [R is the ratio between radio and optical luminosity of a QSO] suggested by Visnovsky et al.(1992,ApJ,391,560), and recently by Schmidt et al.(1995,AJ,109,473). Using the Optical Luminosity Function for optically selected quasars derived by Boyle et al.(
openaire +1 more source
Evidence of Gas Depletion in Quasars with Moderate Radio Emission
The Astrophysical JournalThe energy released by active galactic nuclei (AGNs) is considered to have a profound impact on the cold gas properties of their host galaxies, potentially heating or removing the gas and further suppressing star formation.
Yuhan Wen +6 more
doaj +1 more source
The Hosts Galaxies of Radio-Loud and Radio-Quiet Quasars
, 2001 Latex, 10 pages, including 6 postscript figures.
openaire +2 more sources
Are Radio-Loud Quasars Rebellious or are Radio-Quiets Just Plain Untalented? [PDF]
International Astronomical Union Colloquium, 1997 AbstractWe present some of the results of a preliminary statistical study of 20 QSOs. We compare equivalent widths and widths at 40–80% of flux maximum of the Lyα, Si IVλ1400, C IV λ1549, and C III] λ1909 lines between radio-loud and radio-quiet QSO subsamples and with previously reported findings.
Vestergaard, M. +2 more
openaire +2 more sources