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

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

2010-01-25

arxiv.org/abs/1001.4370v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

to be published in the Proceedings of the IAU Symposium no. 267, "Co-Evolution of Central Black Holes and Galaxies: Feeding an

Scientific paper

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.

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