NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-18 T08:59:38 PDT
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For refcode 2013MNRAS.434..387S:
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Copyright by Royal Astronomical Society. 2013MNRAS.434..387S The supermassive black hole mass-Sersic index relations for bulges and elliptical galaxies Savorgnan, G.; Graham, A. W.; Marconi, A.; Sani, E.; Hunt, L. K.; Vika, M.; Driver, S. P. Abstract. Scaling relations between supermassive black hole mass, M_BH_, and host galaxy properties are a powerful instrument for studying their co-evolution. A complete picture involving all of the black hole scaling relations, in which each relation is consistent with the others, is necessary to fully understand the black hole-galaxy connection. The relation between M_BH_ and the central light concentration of the surrounding bulge, quantified by the Sersic index n, may be one of the simplest and strongest such relations, requiring only uncalibrated galaxy images. We have conducted a census of literature Sersic index measurements for a sample of 54 local galaxies with directly measured M_BH_ values. We find a clear M_BH_-n relation, despite an appreciable level of scatter due to the heterogeneity of the data. Given the current M_BH_-L_sph_ and the L_sph_-n relations, we have additionally derived the expected M_BH_-n relations, which are marginally consistent at the 2sigma level with the observed relations. Elliptical galaxies and the bulges of disc galaxies are each expected to follow two distinct bent M_BH_-n relations due to the Sersic/core-Sersic divide. For the same central light concentration, we predict that M_BH_ in the Sersic bulges of disc galaxies are an order magnitude higher than in Sersic elliptical galaxies if they follow the same M_BH_-L_sph_ relation. Key words: black hole physics, galaxies: bulges, galaxies: fundamental parameters, gal-axies: structure
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