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On the black hole mass - velocity dispersion relation for type-1 and type-2 AGN

We present results from infrared spectroscopic projects that aim to test the relation between the mass of a black hole, M_BH, and the velocity dispersion of the stars in its host-galaxy bulge. We demonstrate that near-infrared, high-resolution spectroscopy assisted by adaptive optics is key in populating the high-luminosity end of the relation. We show that the velocity dispersions of mid-infrared, high-ionization lines originating from gas in the narrow-line region of the active galactic nucleus follow the same relation. This result provides a way of inferring M_BH estimates for the cosmologically significant population of obscured, type-2 AGN that can be applicable to data from spectrographs on the next generation infrared telescopes.

preprint2010arXivOpen access
K. M. DasyraB. M. PetersonL. J. TacconiH. NetzerL. C. HoG. HelouL. ArmusD. LutzR. DaviesL. Watson
astro-ph.CO
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K. M. DasyraB. M. PetersonL. J. TacconiH. NetzerL. C. HoG. HelouL. ArmusD. LutzR. DaviesL. Watson

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