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Max-Planck-Institut für extraterrestrische Physik


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Black Holes in Galaxies and Globular Clusters


Some Recent Results

Studies of the dynamics of stars and gas in the nuclei of nearby galaxies have established that all galaxies with a massive (classical) bulge component contain a central supermassive black hole. The mass of the black hole is closely correlated with the bulge luminosity and the bulge velocity dispersion (see our recent findings ), but the correlation is not well understood at the low and the high velicity dispersion ends.

Therefore, we measure stellar velocities in the nuclei of galaxies with SINFONI, and model them to constrain the masses of the nuclear black holes, and focus on the question whether galaxies with small and large sigma fall onto the black hole mass sigma relation (see the overview of our SINFONI BH project and retrieve the data we have published). Recently we measured the masses of the black holes at the centers of two pseudo-bulge galaxies ( NGC 3368 and NGC 3489 ) and in a massive S0 galaxy ( NGC 1332 ). Central black holes in massive elliptical galaxies are responsible for the desappearing of central cusps in these objects (see our results on BHs and central mass deficits ). Black hole masses can be underestimated by up to a factor 2 if the presence of dark matter halos around giant elliptical galaxies is ignored (see our recent results on the black hole in M87). Finally, seeds black holes can be found in globular clusters (see our systematic search ).

The SINFONI BH Survey

(as PDF)

Available DATA

BHs in 2 Pseudo-Bulges

(as PDF)

BH in NGC 1332

(as PDF)

BHs and Central Mass Deficits

(as PDF)

Scaling Relations of BHs

(as PDF)

The BH in M87 and Dark Matter

(as PDF)

BHs in Globular Clusters

(as PDF)

The authors of the posters are responsible for their content


Recent Papers

Gebhardt, Karl & Thomas, Jens 2009, Astrophysical Journal 700, 1690 The Black Hole Mass, Stellar Mass-to-Light Ratio, and Dark Halo in M87

Gültekin, Kayhan, Richstone, Douglas O., Gebhardt, Karl, Lauer, Tod R., Tremaine, Scott, Aller, M. C., Bender, Ralf, Dressler, Alan, Faber, S. M., Filippenko, Alexei V., Green, Richard, Ho, Luis C., Kormendy, John, Magorrian, John, Pinkney, Jason, & Siopis, Christos 2009, Astrophysical Journal 698, 198 The M-σ and M-L Relations in Galactic Bulges, and Determinations of Their Intrinsic Scatter

Gültekin, Kayhan, Richstone, Douglas O., Gebhardt, Karl, Lauer, Tod R., Pinkney, Jason, Aller, M. C., Bender, Ralf, Dressler, Alan, Faber, S. M., Filippenko, Alexei V., Green, Richard, Ho, Luis C., Kormendy, John, & Siopis, Christos 2009, Astrophysical Journal 695, 1577 A Quintet of Black Hole Mass Determinations

Kormendy, John & Bender, Ralf 2009, Astrophysical Journal 691, 142 Correlations between Supermassive Black Holes, Velocity Dispersions, and Mass Deficits in Elliptical Galaxies with Cores

Nowak, N., Thomas, J., Erwin, P., Saglia, R. P., Bender, R., & Davies, R. I. 2010, Monthly Notices of the Royal Astronomical Society 403, 646 Do black hole masses scale with classical bulge luminosities only? The case of the two composite pseudo-bulge galaxies NGC 3368 and NGC 3489

Siopis, Christos, Gebhardt, Karl, Lauer, Tod R., Kormendy, John, Pinkney, Jason, Richstone, Douglas, Faber, S. M., Tremaine, Scott, Aller, M. C., Bender, Ralf, Bower, Gary, Dressler, Alan, Filippenko, Alexei V., Green, Richard, Ho, Luis C., & Magorrian, John 2009, Astrophysical Journal 693, 946 A Stellar Dynamical Measurement of the Black Hole Mass in the Maser Galaxy NGC 4258


last update: 4/2010, editor of this page: Roberto Philip Saglia


 
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