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| Paper: |
Dynamical Modeling of the Broad Line Region of NGC 4151 |
| Volume: |
540, Compendium of Undergraduate Research in Astronomy and Space Science |
| Page: |
9 |
| Authors: |
Ramachandran, M.; Robinson, J. H.; Bentz, M. C.; Williams, P. R.; Treu, T.; De Rosa, G. |
| Abstract: |
We present results of dynamical modeling using the CARAMEL code of the Hβ-emitting broad line region of NGC 4151 using velocity-resolved reverberation mapping data from 2012. Modeling of the continuum light curve and the variations across the broad Hβ emission line allows for constraints on the geometry and kinematics of the BLR along with black hole mass constraint independent of the ⟨f⟩ factor. The models indicate a BLR represented by a thick disk at an almost face-on inclination in which particles are dominated by unbound orbits with velocities near the escape velocity of the black hole, presenting several inconsistencies with the literature. The models constrain MBH to be log10(MBH/M⊙) = 6.56+0.23-0.33, which is inconsistent with previous CARAMEL modeling results and previous reverberation measurements. We posit that the variability in the light curves is insufficient for CARAMEL to constrain the BLR properties accurately. We strongly recommend the initiation of continuum observations before spectroscopic observations for any future reverberation mapping monitoring campaigns. |
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