SIMBAD references

2013ApJ...770...86W - Astrophys. J., 770, 86 (2013/June-3)

The M87 black hole mass from gas-dynamical models of space telescope imaging spectrograph observations.

WALSH J.L., BARTH A.J., HO L.C. and SARZI M.

Abstract (from CDS):

The supermassive black hole of M87 is one of the most massive black holes known and has been the subject of several stellar and gas-dynamical mass measurements; however, the most recent revision to the stellar-dynamical black hole mass measurement is a factor of about two larger than the previous gas-dynamical determinations. Here, we apply comprehensive gas-dynamical models that include the propagation of emission-line profiles through the telescope and spectrograph optics to new Space Telescope Imaging Spectrograph observations from the Hubble Space Telescope. Unlike the previous gas-dynamical studies of M87, we map out the complete kinematic structure of the emission-line disk within ∼40 pc from the nucleus, and find that a small amount of velocity dispersion internal to the gas disk is required to match the observed line widths. We examine a scenario in which the intrinsic velocity dispersion provides dynamical support to the disk, and determine that the inferred black hole mass increases by only 6%. Incorporating this effect into the error budget, we ultimately measure a mass of MBH = (3.50.7+0.9)x109M (68% confidence). Our gas-dynamical black hole mass continues to differ from the most recent stellar-dynamical mass by a factor of two, underscoring the need for carrying out more cross-checks between the two main black hole mass measurement methods.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual (M87, NGC 4486) - galaxies: kinematics and dynamics - galaxies: nuclei

Simbad objects: 11

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2019.10.23-03:30:10

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