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Gas Disks and Supermassive Black Holes in Nearby Radio Galaxies

Gas Disks and Supermassive Black Holes in Nearby Radio Galaxies

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M BH (M Sun)<br />

10 10<br />

10 9<br />

10 8<br />

10 7<br />

10 6<br />

60 70 80 90100 200 300 400<br />

σ c (km s -1 )<br />

Figure 4.46 Measured black hole masses (MBH) as a function of central stellar velocity<br />

dispersion (σc) for reliable determ<strong>in</strong>ations summarized by Trema<strong>in</strong>e et al. (2002). The<br />

l<strong>in</strong>e <strong>in</strong>dicates the fit M• = 1.3 ×10 8 M⊙(σc/200) 4.72 . (*) <strong>in</strong>dicates masses determ<strong>in</strong>ed<br />

from stellar dynamical model<strong>in</strong>g; (◦) <strong>in</strong>dicates masses determ<strong>in</strong>ed from gas k<strong>in</strong>ematics;<br />

<strong>and</strong> (△) <strong>in</strong>dicates masses determ<strong>in</strong>ed from MASER k<strong>in</strong>ematics. Potential black<br />

holes estimated from the central gas k<strong>in</strong>ematic signatures <strong>in</strong> the UGC FR-I galaxies<br />

(see text) are <strong>in</strong>dicated <strong>in</strong> bold (see Table 4.6). (×) <strong>in</strong>dicates published black hole<br />

mass measurements for the UGC FR-I galaxies (see Chapter 2).<br />

233

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