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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 (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: ------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------- 12 26 27.09 +31 13 24.8 NGC 4414 = LEDA 40692 ------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 72 2 List of fits files fits/* 0 2 Individual fits files
Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
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
Acknowledgements: Sabine Thater, thater(at)
(End) Patricia Vannier [CDS] 20-Oct-2016
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