THE LICK AGN MONITORING PROJECT 2011: DYNAMICAL MODELING OF THE BROAD-LINE REGION IN Mrk 50

We present dynamical modeling of the broad line region (BLR) in the Seyfert 1\ngalaxy Mrk 50 using reverberation mapping data taken as part of the Lick AGN\nMonitoring Project (LAMP) 2011. We model the reverberation mapping data\ndirectly, constraining the geometry and kinematics of the BLR, as well as\nderiving a black hole mass estimate that does not depend on a normalizing\nfactor or virial coefficient. We find that the geometry of the BLR in Mrk 50 is\na nearly face-on thick disk, with a mean radius of 9.6(+1.2,-0.9) light days, a\nwidth of the BLR of 6.9(+1.2,-1.1) light days, and a disk opening angle of\n25\\pm10 degrees above the plane. We also constrain the inclination angle to be\n9(+7,-5) degrees, close to face-on. Finally, the black hole mass of Mrk 50 is\ninferred to be log10(M(BH)/Msun) = 7.57(+0.44,-0.27). By comparison to the\nvirial black hole mass estimate from traditional reverberation mapping\nanalysis, we find the normalizing constant (virial coefficient) to be log10(f)\n= 0.78(+0.44,-0.27), consistent with the commonly adopted mean value of 0.74\nbased on aligning the M(BH)-{\\sigma}* relation for AGN and quiescent galaxies.\nWhile our dynamical model includes the possibility of a net inflow or outflow\nin the BLR, we cannot distinguish between these two scenarios.\n