The southern hemisphere narrow-line seyfert 1 infrared survey

We present a near-infrared spectroscopic survey of narrow-line Seyfert 1 galaxies in the southern hemisphere (using SOFI instrument on ESO-NTT telescope), sampled from optical surveys. examine kinematics broad-line region, probed by emission line width hydrogen (Pa$\alpha$ and H$\beta$). observed 57 objects, which we could firmly measure Pa$\alpha$ 49 cases. find that single Lorentzian fit (preferred theoretical grounds) is preferred over multi-component Gaussian fits to profiles; lack region emission, overwhelmed pole-on view broad (BLR) light, supports this. recompute catalog black hole (BH) mass estimates, using values FWHM luminosity H$\beta$, both re-fitted values. relationship slope greater than unity compared ascribe this contamination galactic light or difficulties with flux measurements. However, comparison masses computed fitted measurements show close unity. Comparing BH estimated widths fluxes shows deviations expected; general, however, are comparable. posit scenario where an intermixture dusty dust-free clouds (or alternately structured atmosphere) differentially absorbs radiation BLR, due dust absorption bound-free absorption.