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Several narrow-line Seyfert 1 galaxies (NLS1s) have now been detected ingamma rays, providing firm evidence that at least some of this class of activegalactic nuclei (AGN) produce relativistic jets. The presence of jets in NLS1sis surprising, as these sources are typified by comparatively small black holemasses and near- or super-Eddington accretion rates. This challenges thecurrent understanding of the conditions necessary for jet production. Comparingthe properties of the jets in NLS1s with those in more familiar jetted systemsis thus essential to improve jet production models. We present early resultsfrom our campaign to monitor the kinematics and polarization of theparsec-scale jets in a sample of 15 NLS1s through multifrequency observationswith the Very Long Baseline Array. These observations are complemented byfast-cadence 15 GHz monitoring with the Owens Valley Radio Observatory 40mtelescope and optical spectroscopic monitoring with with the 2m class telescopeat the Guillermo Haro Astrophysics Observatory in Cananea, Mexico.

The Parsec-scale Structure, Kinematics, and Polarization of Radio-Loud Narrow-Line Seyfert 1 Galaxies