Exploring the link between C iv outflow kinematics and sublimation-temperature dust in quasars. Issue 2 (14th December 2020)

• Record Type: Journal Article
• Authors: Temple, Matthew J; Banerji, Manda; Hewett, Paul C; Rankine, Amy L; Richards, Gordon T
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 501:Issue 2(2021)
• Page Start: 3061
• Page End: 3073
• Publication Date: 2020-12-14
• Subjects: galaxies: evolution -- galaxies: kinematics and dynamics -- quasars: emission lines -- quasars: general; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa3842
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: Using data from SDSS, UKIDSS, and WISE, we investigate the properties of the high-frequency cutoff to the infrared emission in ≃5000 carefully selected luminous ( L bol ∼ 10 47 ) type 1 quasars. The strength of ≃2 μ m emission, corresponding to emission from the hottest ($T\gt 1200\rm \, K$ ) dust in the sublimation zone surrounding the central continuum source, is observed to correlate with the blueshift of the C iv λ1550 emission line. We therefore find that objects with stronger signatures of nuclear outflows tend to have a larger covering fraction of sublimation-temperature dust. When controlling for the observed outflow strength, the hot dust covering fraction does not vary significantly across our sample as a function of luminosity, black hole mass, or Eddington fraction. The correlation between the hot dust and the C iv line blueshifts, together with the lack of correlation between the hot dust and other parameters, therefore provides evidence of a link between the properties of the broad emission line region and the infrared-emitting dusty regions in quasars.