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WISDOM project – V. Resolving molecular gas in Keplerian rotation around the supermassive black hole in NGC 0383
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- North, Eve V. (författare)
- Cardiff University
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- Davis, Timothy A. (författare)
- Cardiff University
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- Bureau, M. (författare)
- Yonsei University,University Of Oxford
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- Cappellari, Michele (författare)
- University Of Oxford
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- Iguchi, Satoru (författare)
- The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan
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- Liu, Lijie (författare)
- University Of Oxford
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- Onishi, Kyoko, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Ehime University
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Sarzi, Marc (författare)
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- Smith, Mark D. (författare)
- University Of Oxford
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- Williams, Thomas G. (författare)
- Cardiff University
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(creator_code:org_t)
- 2019-09-17
- 2019
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 490:1, s. 319-330
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https://doi.org/10.1...
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Abstract
Ämnesord
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- As part of the mm-Wave Interferometric Survey of Dark Object Masses (WISDOM), we present a measurement of the mass of the supermassive black hole (SMBH) in the nearby early-type galaxy NGC 0383 (radio source 3C 031). This measurement is based on Atacama Large Millimeter/sub-millimeter Array (ALMA) cycle 4 and 5 observations of the 12CO(2–1) emission line with a spatial resolution of 58 × 32 pc2 (0.18 arcsec × 0.1 arcsec). This resolution, combined with a channel width of 10 km s−1, allows us to well resolve the radius of the black hole sphere of influence (measured as RSOI = 316 pc = 0.98 arcsec), where we detect a clear Keplerian increase of the rotation velocities. NGC 0383 has a kinematically relaxed, smooth nuclear molecular gas disc with weak ring/spiral features. We forward model the ALMA data cube with the KINEMATIC MOLECULAR SIMULATION (KinMS) tool and a Bayesian Markov Chain Monte Carlo method to measure an SMBH mass of (4.2 ± 0.7) × 109 M, a F160W-band stellar mass-to-light ratio that varies from 2.8 ± 0.6 M/LF160W in the centre to 2.4 ± 0.3 M/LF160W at the outer edge of the disc and a molecular gas velocity dispersion of 8.3 ± 2.1 km s−1(all 3σ uncertainties). We also detect unresolved continuum emission across the full bandwidth, consistent with synchrotron emission from an active galactic nucleus. This work demonstrates that low-J CO emission can resolve gas very close to the SMBH (≈ 140 000 Schwarzschild radii) and hence that the molecular gas method is highly complimentary to megamaser observations, as it can probe the same emitting material.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- Galaxies: kinematics and dynamics
- Galaxies: elliptical and lenticular
- Galaxies: ISM
- Galaxies: individual: NGC 0383
- Galaxies: nuclei
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North, Eve V.
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Davis, Timothy A ...
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Bureau, M.
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Cappellari, Mich ...
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Iguchi, Satoru
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Liu, Lijie
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visa fler...
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Onishi, Kyoko, 1 ...
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Sarzi, Marc
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Smith, Mark D.
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Williams, Thomas ...
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visa färre...
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