The Relation between Black Hole Mass, Bulge Mass, and Near-Infrared Luminosity
Abstract
We present new accurate near-infrared (NIR) spheroid (bulge) structural parameters obtained by a two-dimensional image analysis of all galaxies with a direct black hole (BH) mass determination. As expected, NIR bulge luminosities L bul and BH masses are tightly correlated, and if we consider only those galaxies with a secure BH mass measurement and an accurate L bul (27 objects), the spread of M BH - L bul is similar to M BH -σ e , where σ e is the effective stellar velocity dispersion. We find an intrinsic rms scatter of ≃0.3 dex in log M BH . By combining the bulge effective radii R e measured in our analysis with σ e , we find a tight linear correlation (rms ≃ 0.25 dex) between M BH and the virial bulge mass (∝ R e σ ), with ⟨ M BH / M bul ⟩ ~ 0.002. A partial correlation analysis shows that M BH depends on both σ e and R e and that both variables are necessary to drive the correlations between M BH and other bulge properties.
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