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Date and Time of the Query: 2019-04-22 T13:40:53 PDT
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For refcode 2014MNRAS.438.2117H:
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Copyright by Royal Astronomical Society. 2014MNRAS.438.2117H Globular clusters and supermassive black holes in galaxies: further analysis and a larger sample Harris, Gretchen L. H.; Poole, Gregory B.; Harris, William E. Abstract. We explore several correlations between various large-scale galaxy properties, particularly total globular cluster population (N_GC_), the central black hole mass (M_blackhole_), velocity dispersion (nominally sigma_e_) and bulge mass (M_dyn_). Our data sample of 49 galaxies, for which both N_GC_ and M_blackhole_ are known, is larger than used in previous discussions of these two parameters and we employ the same sample to explore all pairs of correlations. Further, within this galaxy sample, we investigate the scatter in each quantity, with emphasis on the range of published values for sigma_e_ and effective radius (R_e_) for any one galaxy. We find that these two quantities in particular are difficult to measure consistently and caution that precise intercomparison of galaxy properties involving R_e_ and sigma_e_ is particularly difficult. Using both conventional chi^2^-minimization and Monte Carlo Markov Chain fitting techniques, we show that quoted observational uncertainties for all parameters are too small to represent the true scatter in the data. We find that the correlation between M_dyn_ and N_GC_ is stronger than either the M_blackhole_-sigma_e_ or the M_blackhole_-N_GC_ relations. We suggest that this is because both the galaxy bulge population and N_GC_ were fundamentally established at an early epoch during the same series of star-forming events. By contrast, although the seed for M_blackhole_ was likely formed at a similar epoch, its growth over time is less similar from galaxy to galaxy and thus less predictable. Key words: black hole physics, galaxies: fundamental parameters, galaxies: star clusters: general
Retrieve 48 NED objects in this reference.
Please click here for ADS abstract

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