Is there really a super-massive black hole in M87?

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Title: Is there really a super-massive black hole in M87?
Author: Marconi, Alessandro; Axon, David; Macchetto, Duccio; Capetti, Alessandro; Sparks, William; Crane, Phillipe
Abstract: We present the first HST long-slit spectrum of a gaseous disk around a candidate super-massive black-hole. The results of this study on the kinematics of the gaseous disk in M87 are a considerable improvement in both spatial resolution and accuracy over previous observations and requires a projected mass of MBH(sin i)2 = (2.0 ± 0.5)×109M⊙ (MBH = 3.2×109M⊙ for a disk inclination i = 52◦) concentrated within a sphere whose radius is less than 0.′′05 (3.5 pc) to explain the observed rotation curve. The kinematics of the ionized gas is well described by a thin disk in keplerian motion. A lower limit to the mass-to-light ratio of this region is M/LV ≃110, significantly strengthening the claim that this mass is due to the presence of a central black-hole in M87. (Refer to PDF file for exact formulas).
Description: Also archived in: arXiv:astro-ph/9706246 v1 24 Jun 1997RIT community members may access full-text via RIT Libraries licensed databases:
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Date: 1997

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