Results 81 to 90 of about 796,792 (175)
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
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 radio-loud fraction of quasars at z > 6 [PDF]
Quasars at redshifts $z>6$ are an excellent probe of the formation and evolution of supermassive black holes in the early Universe. The population of radio-luminous quasars is of particular interest, as such quasars could potentially be used to study ...
Nithyanandan Thyagarajan +4 more
core +1 more source
The Astrophysical JournalNarrow-line Seyfert 1 galaxies (NLS1s) are generally known to be radio-quiet active galactic nuclei, but a tiny subset of them are found to be extremely radio-loud with radio loudness parameter ( R _1.4 GHz ) > 100.
Veeresh Singh +3 more
doaj +1 more source
Probing the Low-radio-frequency Emission in PG Quasars with the uGMRT. II
The Astrophysical Journal Supplement SeriesWe present results from uGMRT 685 MHz observations of 87 QSOs belonging to the Palomar–Green (PG) quasar sample with z
Sanna Gulati +5 more
doaj +1 more source
Astronomy & AstrophysicsAims. We study differences in the physical properties of quasar host galaxies using an optically selected sample of radio-loud (RL) and radio-quiet quasars (in the redshift range 0.15 ≤ z ≤ 1.9) that we have further cross-matched with the VLA-FIRST ...
Chakraborty Avinanda +6 more
doaj +1 more source
Discovery of a Radio-loud/Radio-quiet Binary Quasar
The Astrophysical Journal, 1999 8 pages, 3 figures, to appear in Astrophysical Journal ...
Brotherton, M. S. +5 more
openaire +2 more sources
Modelling accretion disk winds in quasars
, 2014 Outflows are ubiquitous in active galactic nuclei (AGN). They can take the form of either dramatic radio jets, which extend vast distances into the inter-galactic medium, or of much smaller scale winds - whose existence can be inferred only indirectly ...
Nick Higginbottom +1 more
core +2 more sources
The relationship between the emission line, continuum luminosity, and Baldwin effect in blazars
Astronomy & AstrophysicsAims. This study investigates the relationship between the Mg II λ2798 Å emission line and the 3000 Å continuum luminosity, as well as the Baldwin effect, in a sample of 40’,685 radio-quiet (RQ) quasars and 441 flat spectrum radio quasars (FSRQs ...
Patiño-Álvarez Víctor M. +5 more
doaj +1 more source