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• W2915397710 abstract "We measure the average deflection of cosmic microwave background photons by quasars at $langle z rangle =1.7$. Our sample is selected from the Sloan Digital Sky Survey to cover the redshift range $0.9leq zleq2.2$ with absolute i-band magnitudes of $M_ileq-24$ (K-corrected to z=2). A stack of nearly 200,000 targets reveals an 8$sigma$ detection of Planck's estimate of the lensing convergence towards the quasars. We fit the signal with a model comprising a Navarro-Frenk-White density profile and a 2-halo term accounting for correlated large scale structure, which dominates the observed signal. The best-fitting model is described by an average halo mass $log_{10}(M_{rm h}/h^{-1}M_odot)=12.6pm0.2$ and linear bias $b=2.7pm0.3$ at $z=1.7$, in excellent agreement with clustering studies. We also report of a hint, at a 90% confidence level, of a correlation between the convergence amplitude and luminosity, indicating that quasars brighter than $M_ilesssim -26$ reside in halos of typical mass ${M_{rm h}approx 10^{13},h^{-1}M_odot}$, scaling roughly as ${M_{rm h}propto L_{rm opt}^{3/4}}$ at ${M_ilesssim-24}$, in good agreement with physically-motivated quasar demography models. Although we acknowledge this luminosity dependence is a marginal result, the observed $M_{rm h}$-$L_{rm opt}$ relationship could be interpreted as a reflection of the cutoff in the distribution of black hole accretion rates towards high Eddington ratios: the weak trend of $M_{rm h}$ with $L_{rm opt}$ observed at low luminosity becomes stronger for the most powerful quasars, which tend to be accreting close to the Eddington limit." @default.
• W2915397710 created "2019-03-02" @default.
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• W2915397710 date "2019-03-27" @default.
• W2915397710 modified "2023-10-11" @default.
• W2915397710 title "The Halo Mass of Optically Luminous Quasars at <i>z</i> ≈ 1–2 Measured via Gravitational Deflection of the Cosmic Microwave Background" @default.
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• W2915397710 doi "https://doi.org/10.3847/1538-4357/ab0894" @default.
• W2915397710 hasPublicationYear "2019" @default.
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