J/A+A/597/A18 The central black hole in NGC 4414 (Thater+, 2017)
A low upper-mass limit for the central black hole in the late-type galaxy
NGC 4414.
Thater S., Krajnovic D., Bourne M.A., Cappellari M., de Zeeuw T.,
Emsellem E., Magorrian J., McDermid R.M., Sarzi M., van de Ven G.
<Astron. Astrophys. 597, A18 (2017)>
=2017A&A...597A..18T 2017A&A...597A..18T (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Galaxies, optical ; Galaxies, IR
Keywords: galaxies: individual: NGC 4414 - galaxies: spiral -
galaxies: kinematics and dynamics
Abstract:
We present our mass estimate of the central black hole in the isolated
spiral galaxy NGC 4414. Using natural guide star adaptive optics
assisted observations with the Gemini Near-Infrared Integral Field
Spectrometer (NIFS) and the natural seeing Gemini Multi-Object
Spectrographs-North (GMOS), we derived two-dimensional stellar
kinematic maps of NGC 4414 covering the central 1.5-arcsec and
10-arcsec, respectively, at a NIFS spatial resolution of 0.13-arcsec.
The kinematic maps reveal a regular rotation pattern and a central
velocity dispersion dip down to around 105km/s. We constructed
dynamical methods using two different methods: Jeans anisotropic
dynamical modeling and axisymmetric Schwarzschild modeling. Both
modeling methods give consistent results, but we cannot constrain the
lower mass limit and only measure an upper limit for the black hole
mass of Mbh=1.56x106M☉ (at 3{sigma{ level) which is at least
1σ below the recent Mbh-sigma_e relations. Further tests with
dark matter, mass-to-light ratio variation and different light models
confirm that our results are not dominated by uncertainties. The
derived upper limit mass is not only below the Mbh-sigma_e relation,
but is also five times lower than the lower limit black hole mass
anticipated from the resolution limit of the sphere of influence. This
proves that via high quality integral field data we are now able to
push black hole measurements down to at least five times less than the
resolution limit.
Description:
The FITS files contain the reduced co-added Gemini North NIFS and GMOS
flux data cubes for NGC 4414. The observations and data reduction are
described in Section 2 of the paper. The data cubes were used to
extract the central kinematics of NGC 4414. Both data cubes have 3
extensions: the primary, an E3D_DATA table and an E3D_GRP table.
Objects:
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RA (2000) DE Designation(s)
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12 26 27.09 +31 13 24.8 NGC 4414 = LEDA 40692
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 72 2 List of fits files
fits/* . 2 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 I5 --- Nx Number of pixels along X-axis
26- 29 I4 --- Ny Number of pixels along Y-axis
31- 35 I5 Kibyte size Size of FITS file
37- 57 A21 --- FileName Name of FITS file, in subdirectory fits
59- 72 A14 --- Title Title of the FITS file
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Acknowledgements:
Sabine Thater, thater(at)aip.de
(End) Patricia Vannier [CDS] 20-Oct-2016