Journal article
How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate?
Monthly notices of the Royal Astronomical Society, v 529(3), pp 1995-2007
18 Mar 2024
Abstract
The origin of radio emission in different populations of radio-quiet quasars is relatively unknown, but recent work has uncovered various drivers of increased radio-detection fraction. In this work, we pull together three known factors: optical colour (g - i), C iv distance (a proxy for L/LEdd), and whether or not the quasar contains broad absorption lines (BALQSOs) which signify an outflow. We use SDSS (Sloan Digital Sky Survey) DR14 spectra along with the LOFAR Two Metre Sky Survey Data Release 2 and find that each of these properties have an independent effect. BALQSOs are marginally more likely to be radio-detected than non-BALQSOs at similar colours and L/LEdd, moderate reddening significantly increases the radio-detection fraction and the radio detection increases with L/LEdd above a threshold for all populations. We test a widely used simple model for radio wind shock emission and calculate energetic efficiencies that would be required to reproduce the observed radio properties. We discuss interpretations of these results concerning radio-quiet quasars more generally. We suggest that radio emission in BALQSOs is connected to a different physical origin than the general quasar population since they show different radio properties independent of colour and C iv distance.
Metrics
Details
- Title
- How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate?
- Creators
- James W. Petley (Corresponding Author) - Univ Durham, Ctr Extragalact Astron, Dept Phys, Durham DH1 3LE, EnglandLeah K. Morabito - Durham UniversityAmy L. Rankine - Royal ObservatoryGordon T. Richards - Drexel University, PhysicsNicole L. Thomas - Univ Durham, Ctr Extragalact Astron, Dept Phys, Durham DH1 3LE, EnglandDavid M. Alexander - Durham UniversityVictoria A. Fawcett - Newcastle Univ, Sch Math Stat & Phys, Newcastle Upon Tyne NE1 7RU, EnglandGabriela Calistro Rivera - European Southern ObservatoryIsabella Prandoni - INAF IRA, Via P Gobetti 101, I-40129 Bologna, ItalyPhilip N. Best - Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, ScotlandSthabile Kolwa - Univ Johannesburg, Phys Dept, 5 Kingsway Ave, Rossmore, ZA-2092 Johannesburg, South Africa
- Publication Details
- Monthly notices of the Royal Astronomical Society, v 529(3), pp 1995-2007
- Publisher
- Oxford Univ Press
- Number of pages
- 13
- Grant note
- ST/T506047/1; ST/V506643/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:001186406700010
- Scopus ID
- 2-s2.0-85188160670
- Other Identifier
- 991021864001804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics