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Revealing the inter...
Revealing the intermediate-mass black hole at the heart of the dwarf galaxy NGC404 with sub-parsec resolution ALMA observations
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- Davis, Timothy A. (author)
- Cardiff University
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- Nguyen, Dieu D. (author)
- National Institutes of Natural Sciences (NINS)
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- Seth, Anil C. (author)
- University of Utah
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- Greene, Jenny E. (author)
- Princeton University
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- Nyland, Kristina (author)
- Naval Research Laboratory
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- Barth, Aaron J. (author)
- University of California at Irvine (UCI)
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- Bureau, Martin (author)
- Yonsei University,University Of Oxford
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- Cappellari, Michele (author)
- University Of Oxford
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- den Brok, Mark (author)
- Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam
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- Iguchi, Satoru (author)
- National Institutes of Natural Sciences (NINS),The Graduate University for Advanced Studies (SOKENDAI)
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- Lelli, Federico (author)
- Cardiff University
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- Liu, Lijie (author)
- University Of Oxford
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- Neumayer, Nadine (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- North, (author)
- Cardiff University
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- Onishi, Kyoko, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Sarzi, Marc (author)
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- Smith, Mark D. (author)
- University Of Oxford
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- Williams, Thomas G. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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(creator_code:org_t)
- 2020-07-14
- 2020
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 496:4, s. 4061-4078
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https://doi.org/10.1...
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Abstract
Subject headings
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- We estimate the mass of the intermediate-mass black hole at the heart of the dwarf elliptical galaxy NGC 404 using Atacama Large Millimetre/submillimetre Array (ALMA) observations of the molecular interstellar medium at an unprecedented linear resolution of approximate to 0.5 pc, in combination with existing stellar kinematic information. These ALMA observations reveal a central disc/torus of molecular gas clearly rotating around the black hole. This disc is surrounded by a morphologically and kinematically complex flocculent distribution of molecular clouds, that we resolve in detail. Continuum emission is detected from the central parts of NGC 404, likely arising from the Rayleigh-Jeans tail of emission from dust around the nucleus, and potentially from dusty massive star-forming clumps at discrete locations in the disc. Several dynamical measurements of the black hole mass in this system have been made in the past, but they do not agree. We show here that both the observed molecular gas and stellar kinematics independently require a approximate to 5 x 10(5) M-circle dot black hole once we include the contribution of the molecular gas to the potential. Our best estimate comes from the high-resolution molecular gas kinematics, suggesting the black hole mass of this system is 5.5(-3.8)(+4.1) x 10(5) M-circle dot (at the 99 per cent confidence level), in good agreement with our revised stellar kinematic measurement and broadly consistent with extrapolations from the black hole mass-velocity dispersion and black hole massbulge mass relations. This highlights the need to accurately determine the mass and distribution of each dynamically important component around intermediate-mass black holes when attempting to estimate their masses.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: evolution
- galaxies: dwarf
- galaxies: elliptical and lenticular, cD
- ISM-galaxies: kinematics and dynamics
- galaxies: individual: NGC 404-galaxies
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Davis, Timothy A ...
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Nguyen, Dieu D.
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Seth, Anil C.
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Greene, Jenny E.
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Nyland, Kristina
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Barth, Aaron J.
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show more...
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Bureau, Martin
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Cappellari, Mich ...
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den Brok, Mark
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Iguchi, Satoru
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Lelli, Federico
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Liu, Lijie
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Neumayer, Nadine
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North,
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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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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Analytical Chemi ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Monthly Notices ...
- By the university
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Chalmers University of Technology