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We present dynamical modeling of the broad line region (BLR) in the Seyfert 1galaxy Mrk 50 using reverberation mapping data taken as part of the Lick AGNMonitoring Project (LAMP) 2011. We model the reverberation mapping datadirectly, constraining the geometry and kinematics of the BLR, as well asderiving a black hole mass estimate that does not depend on a normalizingfactor or virial coefficient. We find that the geometry of the BLR in Mrk 50 isa nearly face-on thick disk, with a mean radius of 9.6(+1.2,-0.9) light days, awidth of the BLR of 6.9(+1.2,-1.1) light days, and a disk opening angle of25\pm10 degrees above the plane. We also constrain the inclination angle to be9(+7,-5) degrees, close to face-on. Finally, the black hole mass of Mrk 50 isinferred to be log10(M(BH)/Msun) = 7.57(+0.44,-0.27). By comparison to thevirial black hole mass estimate from traditional reverberation mappinganalysis, we find the normalizing constant (virial coefficient) to be log10(f)= 0.78(+0.44,-0.27), consistent with the commonly adopted mean value of 0.74based on aligning the M(BH)-{\sigma}* relation for AGN and quiescent galaxies.While our dynamical model includes the possibility of a net inflow or outflowin the BLR, we cannot distinguish between these two scenarios.

The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad Line Region in Mrk 50