SIMBAD references

2013ApJ...767...26K - Astrophys. J., 767, 26 (2013/April-2)

Calibrating stellar velocity dispersions based on spatially resolved H-band spectra for improving the MBH*relation.

KANG W.-R., WOO J.-H., SCHULZE A., RIECHERS D.A., KIM S.C., PARK D. and SMOLCIC V.

Abstract (from CDS):

To calibrate stellar velocity dispersion measurements from optical and near-IR stellar lines, and to improve the black hole mass (MBH)-stellar velocity dispersion (σ*) relation, we measure σ* based on high-quality H-band spectra for a sample of 31 nearby galaxies, for which dynamical MBH is available in the literature. By comparing velocity dispersions measured from stellar lines in the H-band with those measured from optical stellar lines, we find no significant difference, suggesting that optical and near-IR stellar lines represent the same kinematics and that dust effect is negligible for early-type galaxies. Based on the spatially resolved rotation and velocity dispersion measurements along the major axis of each galaxy, we find that a rotating stellar disk is present for 80% of galaxies in the sample. For galaxies with a rotation component, σ* measured from a single aperture spectrum can vary by up to ∼20%, depending on the size of the adopted extraction aperture. To correct for the rotational broadening, we derive luminosity-weighted σ* within the effective radius of each galaxy, providing uniformly measured velocity dispersions to improve the MBH*relation.

Abstract Copyright:

Journal keyword(s): galaxies: bulges - galaxies: kinematics and dynamics - infrared: galaxies - techniques: spectroscopic

Simbad objects: 31

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2021.04.22-05:51:47

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