TY - UNPB
T1 - Improving Calibration of the MBH-σ* Relation for AGN with the BRAVE Program
AU - Batiste, Merida
AU - Bentz, Misty C.
AU - Manne-Nicholas, Emily
AU - Raimundo, Sandra I.
AU - Onken, Christopher A.
AU - Vestergaard, Marianne
AU - Bershady, Matthew A.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The MBH - σ* relation for AGN, which relates
the mass of the central supermassive black hole (MBH) to the
bulge stellar velocity dispersion (σ*) of the host
galaxy, is a powerful tool for studying the evolution of structure
across cosmic time. Accurate calibration of this relation is essential,
and much effort has been put into improving MBH
determinations with this in mind. However calibration remains difficult
because many nearby AGN with secure MBH determinations are
hosted by late-type galaxies, with significant kinematic substructure
such as bars, disks and rings. Kinematic substructure is known to
contaminate and bias σ* determinations from long-slit
and single aperture spectroscopy, ultimately limiting the utility of the
MBH - σ* relation, and hampering efforts to
investigate morphological dependencies. Integral-field spectroscopy
(IFS) can be used to map the two dimensional kinematics, providing a
method for measuring σ* absent some of the biases
inherent in other methods, and giving a more complete picture of the
spatial variations in the dynamics. We present the first set of results
from the BRAVE program, the long-term goal of which is to use IFS to
more accurately determine σ* for the calibrating sample
of reverberation-mapped AGN. We present IFS kinematic maps for the
sample of galaxies we have so far observed, which show clearly how
spatial variation can impact σ* determinations from
long-slit spectroscopy. We present a new fit to the MBH -
σ* relation for the sample of 16 reverberation-mapped
AGN for which we currently have σ* determinations from
IFS, as well as a new determination of the virial scaling factor, f, for
use with reverberation-mapping.
AB - The MBH - σ* relation for AGN, which relates
the mass of the central supermassive black hole (MBH) to the
bulge stellar velocity dispersion (σ*) of the host
galaxy, is a powerful tool for studying the evolution of structure
across cosmic time. Accurate calibration of this relation is essential,
and much effort has been put into improving MBH
determinations with this in mind. However calibration remains difficult
because many nearby AGN with secure MBH determinations are
hosted by late-type galaxies, with significant kinematic substructure
such as bars, disks and rings. Kinematic substructure is known to
contaminate and bias σ* determinations from long-slit
and single aperture spectroscopy, ultimately limiting the utility of the
MBH - σ* relation, and hampering efforts to
investigate morphological dependencies. Integral-field spectroscopy
(IFS) can be used to map the two dimensional kinematics, providing a
method for measuring σ* absent some of the biases
inherent in other methods, and giving a more complete picture of the
spatial variations in the dynamics. We present the first set of results
from the BRAVE program, the long-term goal of which is to use IFS to
more accurately determine σ* for the calibrating sample
of reverberation-mapped AGN. We present IFS kinematic maps for the
sample of galaxies we have so far observed, which show clearly how
spatial variation can impact σ* determinations from
long-slit spectroscopy. We present a new fit to the MBH -
σ* relation for the sample of 16 reverberation-mapped
AGN for which we currently have σ* determinations from
IFS, as well as a new determination of the virial scaling factor, f, for
use with reverberation-mapping.
M3 - Working paper
VL - Meeting 229
BT - Improving Calibration of the MBH-σ* Relation for AGN with the BRAVE Program
PB - American Astronomical Society, AAS Meeting #229
ER -