FAINT COSMOS AGNs AT z ∼ 3.3. I. BLACK HOLE PROPERTIES AND CONSTRAINTS ON EARLY BLACK HOLE GROWTH
FAINT COSMOS AGNs AT z ∼ 3.3. I. BLACK HOLE PROPERTIES AND CONSTRAINTS ON EARLY BLACK HOLE GROWTH
ABSTRACT We present new Keck/MOSFIRE K -band spectroscopy for a sample of 14 faint, X-ray-selected active galactic nuclei (AGNs) in the COSMOS field. The data cover the spectral region surrounding the broad Balmer emission lines, which enables the estimation of black hole masses ( <?CDATA ${M}_{\mathrm{BH}}$?> ) and accretion rates …