Radio Dichotomy in Quasars with H FWHM greater than km\,s
arXiv:2208.09860 · doi:10.1093/mnras/stac2398
Abstract
It has been inferred from large unbiased samples that - of all quasars are radio-loud (RL). Using the quasar catalog from the Sloan Digital Sky Survey, we show that the radio-loud fraction (RLF) for high broad line (HBL) quasars, containing H FWHM greater than km s, is . While there is no significant difference between the RL and radio-quiet (RQ) populations in our sample in terms of their black hole mass, Eddington ratio, and covering fraction (CF), optical continuum luminosity of the RL quasars are higher. The similarity in the distribution of their CF indicates that our analysis is unbiased in terms of the viewing angle of the HBL RL and RQ quasars. Hence, we conclude that the accretion disc luminosity of the RL quasars in our HBL sample is higher, which indicates a connection between a brighter disc and a more prominent jet. By comparing them with the non-HBL H broad emission line quasars, we find that the HBL sources have the lowest Eddington ratios in addition to having a very high RLF. That is consistent with the theories of jet formation, in which jets are launched from low Eddington ratio accreting systems. We find that the [O III] narrow emission line is stronger in the RL compared to RQ quasars in our HBL sample, which is consistent with previous findings in the literature, and may be caused by the interaction of the narrow line gas with the jet.
Accepted for publication in MNRAS
References in corpus (26)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- A Catalog of Quasar Properties from SDSS DR7
- The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
- Radio-Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications
- Kiloparsec-scale outflows are prevalent among luminous AGN: outflows and feedback in the context of the overall AGN population
- The diversity of quasars unified by accretion and orientation
- Radio galaxies and feedback from AGN jets
- The black hole mass - stellar velocity dispersion relation of narrow-line Seyfert 1 galaxies
- The Radio-Loud Fraction of Quasars is a Strong Function of Redshift and Optical Luminosity
- On the origin of radio emission in radio quiet quasars
- Signals from the Noise: Image Stacking for Quasars in the FIRST Survey
- The Radius-Luminosity Relationship Depends on Optical Spectra in Active Galactic Nuclei
- Prevalence of radio jets associated with galactic outflows and feedback from quasars
- The Black Hole Mass Scale of Classical and Pseudo Bulges in Active Galaxies
- Multi-dimensional Numerical Scheme for Resistive Relativistic MHD
- The MIXR sample: AGN activity versus star formation across the cross-correlation of WISE, 3XMM, and FIRST/NVSS
- New Insights on the QSO Radio-Loud/Radio-Quiet Dichotomy: SDSS Spectra in the Context of the 4D Eigenvector1 Parameter Space
- Observed properties of FRII quasars and radio galaxies at z < 1.0
- Orientation dependency of broad-line widths in quasars and consequences for black-hole mass estimation
- Markarian 6: shocking the environment of an intermediate Seyfert
- Black hole spin and radio loudness in a LCDM universe
- What produces the far-infrared/submm emission in the most luminous QSOs?
- Evidence for higher black hole spin in radio-loud quasars
- Quasar Radio-Loudness and the Elliptical Core Problem
- BH Mass, Jet and Accretion Disk Connection: An Analysis of Radio-loud and Radio-quiet Quasars
- Properties of Very Broad Line MgII Radio-Loud and Radio-Quiet Quasars