NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-25 T21:52:53 PDT
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For refcode 2013AJ....146..160R:
Retrieve 24 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2013AJ....146..160R Depleted Galaxy Cores and Dynamical Black Hole Masses Rusli, S. P.; Erwin, P.; Saglia, R. P.; Thomas, J.; Fabricius, M.; Bender, R.; Nowak, N. Abstract. Shallow cores in bright, massive galaxies are commonly thought to be the result of scouring of stars by mergers of binary supermassive black holes. Past investigations have suggested correlations between the central black hole mass and the stellar light or mass deficit in the core, using proxy measurements of M_BH_ or stellar mass-to-light ratios (Upsilon). Drawing on a wealth of dynamical models which provide both M_BH_ and Upsilon, we identify cores in 23 galaxies, of which 20 have direct, reliable measurements of M_BH_ and dynamical stellar mass-to-light ratios (Upsilon_sstarf, dyn_). These cores are identified and measured using Core-Sersic model fits to surface brightness profiles which extend out to large radii (typically more than the effective radius of the galaxy); for approximately one-fourth of the galaxies, the best fit includes an outer (Sersic) envelope component. We find that the core radius is most strongly correlated with the black hole mass and that it correlates better with total galaxy luminosity than it does with velocity dispersion. The strong core-size-M_BH_ correlation enables estimation of black hole masses (in core galaxies) with an accuracy comparable to the M_BH_-sigma relation (rms scatter of 0.30 dex in log M_BH_), without the need for spectroscopy. The light and mass deficits correlate more strongly with galaxy velocity dispersion than they do with black hole mass. Stellar mass deficits span a range of 0.2-39 M_BH_, with almost all (87%) being <10 M_BH_; the median value is 2.2 M_BH_. Key words: galaxies: elliptical and lenticular, cD, galaxies: kinematics and dynamics, galaxies: nuclei, galaxies: photometry
Retrieve 24 NED objects in this reference.
Please click here for ADS abstract

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