Astrophys. J., 780, 70 (2014/January-1)
Supermassive black holes and their host galaxies. II. The correlation with near-infrared luminosity revisited.
LASKER R., FERRARESE L., VAN DE VEN G. and SHANKAR F.
Abstract (from CDS):
We present an investigation of the scaling relations between supermassive black hole (SMBH) masses, M•, and their host galaxies' K-band bulge (Lbul) and total (Ltot) luminosities. The wide-field WIRCam imager at the Canada-France-Hawaii-Telescope was used to obtain the deepest and highest resolution near-infrared images available for a sample of 35 galaxies with securely measured M•, selected irrespective of Hubble type. For each galaxy, we derive bulge and total magnitudes using a two-dimensional image decomposition code that allows us to account, if necessary, for large- and small-scale disks, cores, bars, nuclei, rings, envelopes, and spiral arms. We find that the present-day M•-Lbul and M•-Ltotrelations have consistent intrinsic scatter, suggesting that M•correlates equally well with bulge and total luminosity of the host. Our analysis provides only mild evidence of a decreased scatter if the fit is restricted to elliptical galaxies. The log-slopes of the M•-Lbul and M•-Ltotrelations are 0.75±0.10 and 0.92±0.14, respectively. However, while the slope of the M•-Lbulrelation depends on the detail of the image decomposition, the characterization of M•-Ltotdoes not. Given the difficulties and ambiguities of decomposing galaxy images into separate components, our results indicate that Ltotis more suitable as a tracer of SMBH mass than Lbul, and that the M•-Ltotrelation should be used when studying the co-evolution of SMBHs and galaxies.
black hole physics - galaxies: evolution
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