Calibrating High-z Black Hole Mass Estimators Using The FMOS Near-IR Spectra

Details Calibrating High-z Black Hole Mass Estimators Using The FMOS Near-IR Spectra Calibrating High-z Black Hole Mass Estimators Using The FMOS Near-IR Spectra

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21743010w&link_type=abstract

American Astronomical Society, AAS Meeting #217, #430.10; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Using the newly commisoned Fiber-Multi-Object-Spectrograph at the Subaru telescope, we obtained near-IR spectra of a sample of 17 quasars at 0.6 < z < 2.6, selected from the NOAO Deep Wide-Field Survey (NDWFS) Bootes field, in order to calibrate high-z black hole mass (MBH) estimators. MBHs are generally determined through the kinematics of ionized gas clouds around the black hole assuming virial equilibrium. The velocity profiles of Hbeta/Halpha, Mg II and C IV are used to infer the gas kinematics of low-z, mid-z, and high-z quasars, respectively. However, the MBHs based on MgII and CIV are not very well calibrated. We compare the Hbeta/Halpha-based MBH estimates from the new FMOS near-IR spectra, with the CIV/MgII-based MBH estimates from our existing optical spectra, and present a new calibration of MBH estimators.

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