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Date and Time of the Query: 2019-05-20 T01:39:22 PDT
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For refcode 2016ApJ...821...88S:
Retrieve 66 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2016ApJ...821...88S Supermassive Black Holes and their Host Spheroids III. The Mbh-nsph Correlation Savorgnan, Giulia A. D. Abstract. The Sersic {R}^1/n^ model is the best approximation known to date for describing the light distribution of stellar spheroidal and disk components, with the Sersic index n providing a direct measure of the central radial concentration of stars. The Sersic index of a galaxy's spheroidal component, n_sph_, has been shown to tightly correlate with the mass of the central supermassive black hole, M_BH_. The {M}_{BH_}{--}{n}_{sph_} correlation is also expected from other two well known scaling relations involving the spheroid luminosity, L_sph_: the {L}_{sph_}{--}{n}_{sph_} and the {M}_{BH_}{--}{L}_{sph_}. Obtaining an accurate estimate of the spheroid Sersic index requires a careful modeling of a galaxy's light distribution and some studies have failed to recover a statistically significant {M}_{BH_}{--}{n}_{sph_} correlation. With the aim of re-investigating the {M}_{BH_}{--}{n}_{sph_} and other black hole mass scaling relations, we performed a detailed (i.e., bulge, disks, bars, spiral arms, rings, halo, nucleus, etc.) decomposition of 66 galaxies, with directly measured black hole masses, that had been imaged at 3.6 micron with Spitzer. In this paper, the third of this series, we present an analysis of the {L}_{sph_}{--}{n}_{sph_} and {M}_{BH_}{--}{n}_{sph_} diagrams. While early-type (elliptical+lenticular) and late-type (spiral) galaxies split into two separate relations in the {L}_{sph_}{--}{n}_{sph_} and {M}_{BH_}{--}{L}_{sph_} diagrams, they reunite into a single {M}_{BH_} is proportional to {n}_{sph_}^3.39+/- 0.15^ sequence with relatively small intrinsic scatter (epsilo ~= 0.25 {dex}). The black hole mass appears to be closely related to the spheroid central concentration of stars, which mirrors the inner gradient of the spheroid gravitational potential. Key words: black hole physics, galaxies: bulges, galaxies: elliptical and lenticular, cD, galaxies: evolution, galaxies: structure
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