Dynamical Modeling of the CIV Broad Line Region of the $z=2.805$ Multiply Imaged Quasar SDSS J2222+2745
2021
Online
report
We present CIV BLR modeling results for the multiply imaged $z=2.805$ quasar SDSS J2222+2745. Using data covering a 5.3 year baseline after accounting for gravitational time delays, we find models that can reproduce the observed emission-line spectra and integrated CIV fluctuations. The models suggest a thick disk BLR that is inclined by $\sim$40 degrees to the observer's line of sight and with a emissivity weighted median radius of $r_{\rm median} = 33.0^{+2.4}_{-2.1}$ light days. The kinematics are dominated by near-circular Keplerian motion with the remainder inflowing. The rest-frame lag one would measure from the models is $\tau_{\rm median} = 36.4^{+1.8}_{-1.8}$ days, which is consistent with measurements based on cross-correlation. We show a possible geometry and transfer function based on the model fits and find that the model-produced velocity-resolved lags are consistent with those from cross-correlation. We measure a black hole mass of $\log_{10}(M_{\rm BH}/M_\odot) = 8.31^{+0.07}_{-0.06}$, which requires a scale factor of $\log_{10}(f_{{\rm mean},\sigma}) = 0.20^{+0.09}_{-0.07}$.
Comment: 8 pages, 5 figures, submitted to ApJL
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Dynamical Modeling of the CIV Broad Line Region of the $z=2.805$ Multiply Imaged Quasar SDSS J2222+2745
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Autor/in / Beteiligte Person: | Williams, Peter R. ; Treu, Tommaso ; Dahle, Håkon ; Valenti, Stefano ; Abramson, Louis ; Barth, Aaron J. ; Brewer, Brendon J. ; Dyrland, Karianne ; Gladders, Michael ; Horne, Keith ; Sharon, Keren |
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Veröffentlichung: | 2021 |
Medientyp: | report |
DOI: | 10.3847/2041-8213/ac081b |
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