Black Hole-Bulge Relations of Megamaser Galaxies

Physics

Scientific paper

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Black Holes, Mass Measurement, Spiral Galaxies, Brightness, Black Holes, Masses And Mass Distribution, Spiral Galaxies, Magnitudes And Colors, Luminosities

Scientific paper

We present measurements of stellar velocity dispersion (σ*) and bulge luminosity for nine galaxies with dynamical black hole (BH) mass measurements from megamasers. With BH masses of ~107 Msolar, these ~L* spiral galaxies open a new window on BH-bulge scaling relations at low mass and in spiral galaxies. We show preliminary evidence that BH-bulge scaling relations do not extend in a straighforward manner into the lower-mass regime.

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