Sökning: LAR1:cth > ALMA resolves the r...
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000 | 06815naa a2200649 4500 | |
001 | oai:research.chalmers.se:ca667122-4498-43a7-afb4-533c565fe40c | |
003 | SwePub | |
008 | 200917s2020 | |||||||||||000 ||eng| | |
024 | 7 | a https://research.chalmers.se/publication/5191782 URI |
024 | 7 | a https://doi.org/10.1051/0004-6361/2020382822 DOI |
024 | 7 | a https://research.chalmers.se/publication/5196372 URI |
040 | a (SwePub)cth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Aalto, Susanne,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)saalto |
245 | 1 0 | a ALMA resolves the remarkable molecular jet and rotating wind in the extremely radio-quiet galaxy NGC 1377 |
264 | c 2020-08-21 | |
264 | 1 | b EDP Sciences,c 2020 |
338 | a electronic2 rdacarrier | |
520 | a Submillimetre and millimetre line and continuum observations are important in probing the morphology, column density, and dynamics of the molecular gas and dust around obscured active galactic nuclei (AGNs) and their mechanical feedback. With very high-resolution (0.'' 02x0.'' 03 (2x3 pc)) ALMA 345 GHz observations of CO 3-2, HCO+ 4-3, vibrationally excited HCN 4-3 nu (2)=1f, and continuum we have studied the remarkable, extremely radio-quiet, molecular jet and wind of the lenticular galaxy NGC 1377. The outflow structure is resolved, revealing a 150 pc long, clumpy, high-velocity (similar to 600 km s(-1)), collimated molecular jet where the molecular emission is emerging from the spine of the jet with an average diameter of 3-7 pc. The jet widens to 10-15 pc about 25 pc from the centre, which is possibly due to jet-wind interactions. A narrow-angle (50 degrees -70 degrees), misaligned and rotating molecular wind surrounds the jet, and both are enveloped by a larger-scale CO-emitting structure at near-systemic velocity. The jet and narrow wind have steep radial gas excitation gradients and appear turbulent with high gas dispersion (sigma> 40 km s(-1)). The jet shows velocity reversals that we propose are caused by precession, or more episodic directional changes. We discuss the mechanisms powering the outflow, and we find that an important process for the molecular jet and narrow wind is likely magneto-centrifugal driving. In contrast, the large-scale CO-envelope may be a slow wind, or cocoon that stems from jet-wind interactions. An asymmetric, nuclear r similar to 2 pc dust structure with a high inferred molecular column density N(H-2) similar or equal to 1.8x10(24) cm(-2) is detected in continuum and also shows compact emission from vibrationally excited HCN. The nuclear dust emission is hot (T-d> 180 K) and its luminosity is likely powered by a buried AGN. The lopsided structure appears to be a warped disk, which is responsible for a significant part of the nuclear obscuration and possibly formed as a result of uneven gas inflows. The dynamical mass inside r=1.4 pc is estimated to 9(-3)(+2) x 10(6)M(circle dot) 9 - 3 + 2 x 10 6 M circle dot , implying that the supermassive black hole (SMBH) has a high mass with respect to the stellar velocity dispersion of NGC 1377. We suggest that the SMBH of NGC 1377 is currently in a state of moderate growth, at the end of a more intense phase of accretion and also evolving from a state of more extreme nuclear obscuration. The nuclear growth may be fuelled by low-angular momentum gas inflowing from the gas ejected in the molecular jet and wind. Such a feedback-loop of cyclic outflows and central accretion could explain why there is still a significant reservoir of molecular gas in this ageing, lenticular galaxy. A feedback-loop would be an effective process in growing the nuclear SMBH and thus would constitute an important phase in the evolution of NGC 1377. This also invites new questions as to SMBH growth processes in obscured, dusty galaxies. | |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysikx Fusion, plasma och rymdfysik0 (SwePub)103032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Fusion, Plasma and Space Physics0 (SwePub)103032 hsv//eng |
653 | a galaxies: individual: NGC 1377 | |
653 | a ISM: jets and outflows | |
653 | a galaxies: active | |
653 | a ISM: molecules | |
653 | a galaxies: evolution | |
653 | a galaxies: nuclei | |
700 | 1 | a Falstad, Niklas,d 1987u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)falstad |
700 | 1 | a Muller, Sebastien,d 1976u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mullers |
700 | 1 | a Wada, K.u Kagoshima University4 aut |
700 | 1 | a Gallagher, J. S.u University of Wisconsin Madison4 aut |
700 | 1 | a König, Sabine,d 1983u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)ksabine |
700 | 1 | a Sakamoto, K.u Academia Sinica Taiwan4 aut |
700 | 1 | a Vlemmings, Wouter,d 1974u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)wouterv |
700 | 1 | a Ceccobello, Chiara,d 1984u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)chiarac |
700 | 1 | a Dasyra, K.u University of Athens4 aut |
700 | 1 | a Combes, F.u Sorbonne Université,Sorbonne University4 aut |
700 | 1 | a Garcia-Burillo, S.u Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)4 aut |
700 | 1 | a Oya, Y.u University of Tokyo, Japan4 aut |
700 | 1 | a Martin, S.u Atacama Large Millimeter-submillimeter Array (ALMA),European Southern Observatory Santiago4 aut |
700 | 1 | a van der Werf, P.u Universiteit Leiden (UL),Leiden University (UL)4 aut |
700 | 1 | a Evans, A. S.u University of Virginia,National Radio Astronomy Observatory4 aut |
700 | 1 | a Kotilainen, J.u Turun Yliopisto,University of Turku4 aut |
710 | 2 | a Chalmers tekniska högskolab Kagoshima University4 org |
773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 640q 640x 0004-6361x 1432-0746 |
856 | 4 | u https://research.chalmers.se/publication/519637/file/519637_Fulltext.pdfx primaryx freey FULLTEXT |
856 | 4 | u http://arxiv.org/pdf/2007.07824 |
856 | 4 8 | u https://research.chalmers.se/publication/519178 |
856 | 4 8 | u https://doi.org/10.1051/0004-6361/202038282 |
856 | 4 8 | u https://research.chalmers.se/publication/519637 |
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