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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004974naa a2200589 4500
001oai:research.chalmers.se:a902c5cc-7c6d-448b-aa2c-a1afebe5a904
003SwePub
008211217s2021 | |||||||||||000 ||eng|
0247 a https://doi.org/10.1051/0004-6361/2020398862 DOI
0247 a https://research.chalmers.se/publication/5277242 URI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Audibert, A.u Observatoire de Paris,Paris Observatory,Instituto de Astrofísica de Canarias,National Observatory of Athens,Universidad de la Laguna,University of La Laguna4 aut
2451 0a Black hole feeding and star formation in NGC 1808
264 c 2021-12-03
264 1b EDP Sciences,c 2021
338 a electronic2 rdacarrier
520 a We report on Atacama Large Millimeter Array (ALMA) observations of CO(3-2) emission in the Seyfert2/starburst galaxy NGC1808, at a spatial resolution of 4 pc. Our aim is to investigate the morphology and dynamics of the gas inside the central 0.5 kpc and to probe the nuclear feeding and feedback phenomena. We discovered a nuclear spiral of radius 100 = 45 pc. Within it, we found a decoupled circumnuclear disk or molecular torus of a radius of 0:1300 = 6 pc. The HCN(4-3) and HCO+(4-3) and CS(7-6) dense gas line tracers were simultaneously mapped and detected in the nuclear spiral and they present the same misalignment in the molecular torus. At the nucleus, the HCN/HCO+ and HCN/CS ratios indicate the presence of an active galactic nucleus (AGN). The molecular gas shows regular rotation, within a radius of 400 pc, except for the misaligned disk inside the nuclear spiral arms. The computations of the torques exerted on the gas by the barred stellar potential reveal that the gas within a radius of 100 pc is feeding the nucleus on a timescale of five rotations or on an average timescale of 60 Myr. Some non-circular motions are observed towards the center, corresponding to the nuclear spiral arms. We cannot rule out that small extra kinematic perturbations could be interpreted as a weak outflow attributed to AGN feedback. The molecular outflow detected at 250 pc in the NE direction is likely due to supernovae feedback and it is connected to the kpc-scale superwind.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
650 7a NATURVETENSKAPx Fysikx Fusion, plasma och rymdfysik0 (SwePub)103032 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Fusion, Plasma and Space Physics0 (SwePub)103032 hsv//eng
653 a Galaxies: kinematics and dynamics
653 a Galaxies: nuclei
653 a Galaxies: ISM
653 a Galaxies: starburst
653 a Galaxies: individual: NGC 1808
653 a Galaxies: active
7001 a Combes, F.u Collège de France,Observatoire de Paris,Paris Observatory4 aut
7001 a Burillo, S. G.u Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)4 aut
7001 a Hunt, L. K.u Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory4 aut
7001 a Eckart, A.u Universität zu Köln,University of Cologne4 aut
7001 a Aalto, Susanne,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)saalto
7001 a Casasola, V.u Istituto di Radioastronomia4 aut
7001 a Boone, F.u Institut de Recherche en Astrophysique et Planétologie (IRAP)4 aut
7001 a Krips, M.u Institut de Radioastronomie Millimétrique (IRAM)4 aut
7001 a Viti, Serenau University College London (UCL),Universiteit Leiden (UL),Leiden University (UL)4 aut
7001 a Muller, Sebastien,d 1976u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mullers
7001 a Dasyra, K. M.u National Observatory of Athens,University of Athens4 aut
7001 a van der Werf, P.u Universiteit Leiden (UL),Leiden University (UL)4 aut
7001 a Martin, S.u European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA)4 aut
7102 a Observatoire de Parisb Instituto de Astrofísica de Canarias4 org
7730 t Astronomy and Astrophysicsd : EDP Sciencesg 656q 656x 0004-6361x 1432-0746
8564 u https://research.chalmers.se/publication/527724/file/527724_Fulltext.pdfx primaryx freey FULLTEXT
8564 u https://www.aanda.org/articles/aa/pdf/2021/12/aa39886-20.pdf
8564 8u https://doi.org/10.1051/0004-6361/202039886
8564 8u https://research.chalmers.se/publication/527724

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