A precessing molecular jet signaling an obscured, growing supermassive black hole in NGC 1377?

Aalto, Susanne,1964Chalmers tekniska högskola,Chalmers University of Technology (författare)

With high resolution (0."25 × 0."18) ALMA CO 3-2 (345 GHz) observations of the nearby (D = 21 Mpc, 1" = 102 pc), extremely radio-quiet galaxy NGC 1377, we have discovered a high-velocity, very collimated nuclear outflow which we interpret as a molecular jet with a projected length of ± 150 pc. The launch region is unresolved and lies inside a radius r 40% of the flux in NGC 1377 and may be a slower, wide-angle molecular outflow which is partially entrained by the molecular jet. We discuss the driving mechanism of the molecular jet and suggest that it is either powered by a (faint) radio jet or by an accretion disk-wind similar to those found towards protostars. It seems unlikely that a massive jet could have been driven out by the current level of nuclear activity which should then have undergone rapid quenching. The light jet would only have expelled 10% of the inner gas and may facilitate nuclear activity instead of suppressing it. The nucleus of NGC 1377 harbours intense embedded activity and we detect emission from vibrationally excited HCN J = 4-3?2 = 1f which is consistent with hot gas and dust. We find large columns of H2 in the centre of NGC 1377 which may be a sign of a high rate of recent gas infall. The dynamical age ofthe molecular jet is short (

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
Galaxies: jets
Galaxies: individual: NGC 1377
Galaxies: active
ISM: molecules
Galaxies: ISM
Galaxies: evolution

Costagliola, Francesco,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)costagli (författare)
Muller, Sebastien,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mullers (författare)
Sakamoto, K.Academia Sinica Taiwan (författare)
Gallagher, JayUniversity of Wisconsin Madison (författare)
Dasyra, K. M.University of Athens (författare)
Wada, K.Kagoshima University (författare)
Combes, F.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (författare)
Burillo, S. G.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (författare)
Kristensen, L.Harvard-Smithsonian Center for Astrophysics (författare)
Martin, S.Atacama Large Millimeter-submillimeter Array (ALMA),Institut de Radioastronomie Millimétrique (IRAM),European Southern Observatory Santiago (författare)
van der Werf, P.Universiteit Leiden (UL),Leiden University (UL) (författare)
Evans, A. S.University of Virginia,National Radio Astronomy Observatory (författare)
Kotilainen, J.Turun Yliopisto,University of Turku (författare)
Chalmers tekniska högskolaAcademia Sinica Taiwan (creator_code:org_t)

Ingår i:Astronomy and Astrophysics: EDP Sciences590, s. Art. no. A73-0004-63611432-0746

Av författaren/redakt...: Aalto, Susanne, ...; Costagliola, Fra ...; Muller, Sebastie ...; Sakamoto, K.; Gallagher, Jay; Dasyra, K. M.; visa fler...; Wada, K.; Combes, F.; Burillo, S. G.; Kristensen, L.; Martin, S.; van der Werf, P.; Evans, A. S.; Kotilainen, J.; visa färre...

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