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    Refining The M-Bh-V-C Scaling Relation With H I Rotation Curves Of Water Megamaser Galaxies

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    2013_11_megamaser.pdf (2.024Mb)
    Date
    2013-11
    Author
    Sun, Ai-Lei
    Greene, Jenny E.
    Impellizzeri, C. M. Violette
    Kuo, Cheng-Yu
    Braatz, James A.
    Tuttle, Sarah
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    Abstract
    Black-hole-galaxy scaling relations provide information about the coevolution of supermassive black holes and their host galaxies. We compare the black-hole mass-circular-velocity (M-BH-V-c) relation with the black-holemass-bulge-stellar-velocity-dispersion (M-BH-sigma(*)) relation to see whether the scaling relations can passively emerge from a large number of mergers or require a physical mechanism, such as feedback from an active nucleus. We present Very Large Array HI observations of five galaxies, including three water megamaser galaxies, to measure the circular velocity. Using 22 galaxies with dynamical M-BH measurements and V-c measurements extending to large radius, our best-fit M-BH-V-c relation, logMBH = alpha +beta log(V-c/200 km s(-1)), yields a = 7.43+0.13 -0.13, beta = 3.68(-1.20)(+1.23), and an intrinsic scatter is an element of(int) = 0.51(-0.09)(+0.11). The intrinsic scatter may well be higher than 0.51, as we take great care to ascribe conservatively large observational errors. We find comparable scatter in the M-BH-sigma(*) relations, is an element of(int) = 0.48(-0.08)(+0.10), while pure merging scenarios would likely result in a tighter scaling with the dark halo (as traced by V-c) properties rather than the baryonic (sigma(*)) properties. Instead, feedback from the active nucleus may act on bulge scales to tighten the M-BH-sigma(*) relation with respect to the M-BH-V-c relation, as observed.
    Department
    McDonald Observatory
    Subject
    quasars: supermassive black holes
    supermassive black-holes
    dark-matter halo
    sight velocity
    distributions
    nuclear star cluster
    elliptic galaxies
    host galaxies
    neutral hydrogen
    sigma relation
    ugc 3789
    fundamental relation
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/34708
    Citation
    Sun, Ai-Lei, Jenny E. Greene, CM Violette Impellizzeri, Cheng-Yu Kuo, James A. Braatz, and Sarah Tuttle. "Refining the M BH-V c Scaling Relation with HI Rotation Curves of Water Megamaser Galaxies." The Astrophysical Journal, Vol. 778, No. 1 (Nov., 2013): 47.
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