WISDOM project - VII. Molecular gas measurement of the supermassive black hole mass in the elliptical galaxy NGC 7052

Supermassive black hole (SMBH) masses can be measured by resolving the dynamical influences of the SMBHs on tracers of the central potentials. Modern long-baseline interferometers have enabled the use of molecular gas as such a tracer. We present here Atacama Large Millimeter/submillimeter Array observations of the elliptical galaxy NGC 7052 at 0.''.11 (37 pc) resolution in the (CO)-C-12(2-1) line and 1.3 mm continuum emission. This resolution is sufficient to resolve the region in which the potential is dominated by the SMBH. We forward model these observations, using a multi-Gaussian expansion of a Hubble Space Telescope F814W image and a spatially constant mass-to-light ratio to model the stellar mass distribution. We infer an SMBH mass of 2.5 +/- 0.3 x 10(9) M-circle dot and a stellar I-band mass-to-light ratio of 4.6 +/- 0.2 M-circle dot/L-circle dot,L-I (3 sigma confidence intervals). This SMBH mass is significantly larger than that derived using ionized gas kinematics, which however appears significantly more kinematically disturbed than the molecular gas. We also show that a central molecular gas deficit is likely to be the result of tidal disruption of molecular gas clouds due to the strong gradient in the central gravitational potential.

Bureau, MartinUniversity Of Oxford,Yonsei University (författare)
Davis, Timothy A.Cardiff University (författare)
Cappellari, MicheleUniversity Of Oxford (författare)
Liu, LijieUniversity Of Oxford (författare)
Onishi, Kyoko,1989Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kyokoo (författare)
Iguchi, SatoruThe Graduate University for Advanced Studies (SOKENDAI),National Institutes of Natural Sciences (NINS) (författare)
North,Cardiff University (författare)
Sarzi, Marc (författare)
Williams, Thomas G.Cardiff University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (författare)
University Of OxfordYonsei University (creator_code:org_t)

Ingår i:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)503:4, s. 5984-59960035-87111365-2966

Av författaren/redakt...: Smith, Mark D.; Bureau, Martin; Davis, Timothy A ...; Cappellari, Mich ...; Liu, Lijie; Onishi, Kyoko, 1 ...; visa fler...; Iguchi, Satoru; North,; Sarzi, Marc; Williams, Thomas ...; visa färre...

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