Journal article
Probing the Wind Component of Radio Emission in Luminous High-redshift Quasars
The Astronomical journal, v 162(6)
01 Dec 2021
Abstract
We discuss a probe of the contribution of wind-related shocks to the radio emission in otherwise radio-quiet quasars. Given (1) the nonlinear correlation between UV and X-ray luminosity in quasars, (2) that such a correlation leads to higher likelihood of radiation-line-driven winds in more luminous quasars, and (3) that luminous quasars are more abundant at high redshift, deep radio observations of high-redshift quasars are needed to probe potential contributions from accretion disk winds. We target a sample of 50 z similar or equal to 1.65 color-selected quasars that span the range of expected accretion disk wind properties as traced by broad C iv emission. 3 GHz observations with the Very Large Array to an rms of approximate to 10 mu Jy beam(-1) probe to star formation rates of similar to 400 M (circle dot) yr(-1), leading to 22 detections. Supplementing these pointed observations are survey data of 388 sources from the LOFAR Two-meter Sky Survey Data Release 1 that reach comparable depth (for a typical radio spectral index), where 123 sources are detected. These combined observations reveal a radio detection fraction that is a nonlinear function of C iv emission-line properties and suggest that the data may require multiple origins of radio emission in radio-quiet quasars. We find evidence for radio emission from weak jets or coronae in radio-quiet quasars with low Eddington ratios, with either (or both) star formation and accretion disk winds playing an important role in optically luminous quasars and correlated with increasing Eddington ratio. Additional pointed radio observations are needed to fully establish the nature of radio emission in radio-quiet quasars.
Metrics
Details
- Title
- Probing the Wind Component of Radio Emission in Luminous High-redshift Quasars
- Creators
- Gordon T. Richards - Drexel UniversityTrevor McCaffrey - Drexel Univ, Dept Phys, 32 S 32nd St, Philadelphia, PA 19104 USAAmy Kimball - Natl Radio Astron Observ, 1003 Lopezville Rd, Socorro, NM 87801 USAAmy L. Rankine - Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, EnglandJames H. Matthews - Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, EnglandPaul C. Hewett - Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, EnglandAngelica B. Rivera - Drexel Univ, Dept Phys, 32 S 32nd St, Philadelphia, PA 19104 USA
- Publication Details
- The Astronomical journal, v 162(6)
- Publisher
- IOP Publishing Ltd
- Number of pages
- 15
- Grant note
- Max Planck Society; Foundation CELLEX Science and Technology Facilities Council (STFC) PhD studentship; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) University of Cambridge University of Chicago Max-Planck-Institute for Astrophysics (MPA) U.S. Department of Energy; United States Department of Energy (DOE) National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) Korean Scientist Group Institute for Advanced Study Chinese Academy of Sciences (LAMOST); Chinese Academy of Sciences United States Naval Observatory Japanese Monbukagakusho; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Ohio State University Fermilab University of Pittsburgh Los Alamos National Laboratory; United States Department of Energy (DOE) University of Basel STFC via the Institute of Astronomy, Cambridge, Consolidated Grant; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) U.S. Department of Energy Office of Science; United States Department of Energy (DOE) Joint Institute for Nuclear Astrophysics Alfred P. Sloan Foundation University of Washington Princeton University Max-Planck-Institute for Astronomy (MPIA) New Mexico State University Japan Participation Group; Sloan Digital Sky Survey (SDSS) University of Portsmouth Higher Education Funding Council for England; UK Research & Innovation (UKRI); Higher Education Funding Council for England (HEFCE) Astrophysical Institute Potsdam Kavli Institute for Particle Astrophysics and Cosmology American Museum of Natural History Case Western Reserve University National Science Foundation; National Science Foundation (NSF) Johns Hopkins University Drexel University
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000723402800001
- Scopus ID
- 2-s2.0-85120793314
- Other Identifier
- 991019168558804721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics