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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 225814.0, MPI für Astronomie / Publikationen_mpia
The central dusty torus in the active nucleus of NGC 1068
Authors:Jaffe, W.; Meisenheimer, K.; Röttgering, H. J. A.; Leinert, Ch.; Richichi, A.; Chesneau, O.; Fraix-Burnet, D.; Glazenborg-Kluttig, A.; Granato, G.-L.; Graser, U.; Heijligers, B.; Köhler, R.; Malbet, F.; Miley, G. K.; Paresce, F.; Pel, J.-W.; Perrin, G.; Przygodda, F.; Schoeller, M.; Sol, H.; Waters, L. B. F. M.; Weigelt, G.; Woillez, J.; de Zeeuw, P. T.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Nature
Volume:429
Start Page:47
End Page:49
Review Status:not specified
Audience:Not Specified
Abstract / Description:Active galactic nuclei (AGNs) display many
energetic phenomena-broad emission lines,
X-rays, relativistic jets, radio
lobes-originating from matter falling onto a
supermassive black hole. It is widely accepted
that orientation effects play a major role in
explaining the observational appearance of AGNs.
Seen from certain directions, circum-nuclear
dust clouds would block our view of the central
powerhouse. Indirect evidence suggests that the
dust clouds form a parsec-sized torus-shaped
distribution. This explanation, however, remains
unproved, as even the largest telescopes have not
been able to resolve the dust structures. Here
we report interferometric mid-infrared
observations that spatially resolve these
structures in the galaxy NGC 1068. The
observations reveal warm (320K) dust in a
structure 2.1 parsec thick and 3.4 parsec in
diameter, surrounding a smaller hot structure.
As such a configuration of dust clouds would
collapse in a time much shorter than the active
phase of the AGN, this observation requires a
continual input of kinetic energy to the cloud
system from a source coexistent with the AGN.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:K‚‚ouml;nigstuhl 17, D-69117 Heidelberg,
Germany), AC(Leiden Observatory, Niels Bohrweg 2,
2333 CA Leiden, The Netherlands), AD(Max Planck
Institut f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl
17, D-69117 Heidelberg, Germany), AE(European
Southern Observatory, Karl Schwarzschild Strasse
2, D-85748 Garching bei M‚‚uuml;nchen, Germany),
AF(Max Planck Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, D-69117 Heidelberg,
Germany), AG(Observatoire de Grenoble, BP 53,
F-38041 Grenoble, Cedex 9, France), AH(Stichting
ASTRON, 7990 AA Dwingeloo, Netherlands),
AI(Astronomical Observatory of Padua, Vicolo
dell'Osservatorio 5, I-35122 Padova, Italy),
AJ(Max Planck Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, D-69117 Heidelberg,
Germany), AK(Leiden Observatory, Niels Bohrweg 2,
2333 CA Leiden, The Netherlands), AL(Max Planck
Institut f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl
17, D-69117 Heidelberg, Germany), AM(Observatoire
de Grenoble, BP 53, F-38041 Grenoble, Cedex 9,
France), AN(Leiden Observatory, Niels Bohrweg 2,
2333 CA Leiden, The Netherlands), AO(European
Southern Observatory, Karl Schwarzschild Strasse
2, D-85748 Garching bei M‚‚uuml;nchen, Germany),
AP(Kapteyn Astronomical Institute, Postbus 800,
9700 AV Groningen, The Netherlands),
AQ(Observatoire de Paris-Meudon, 92195 Meudon,
France), AR(Max Planck Institut f‚‚uuml;r
Astronomie, K‚‚ouml;nigstuhl 17, D-69117
Heidelberg, Germany), AS(European Southern
Observatory, Casilla 19001, Santiago, Chile),
AT(Observatoire de Paris-Meudon, 92195 Meudon,
France), AU(Astronomical Institute ``Anton
Pannekoek'', Univ. of Amsterdam, Kruislaan 403,
1098 SJ Amsterdam, The Netherlands),
AV(Max-Planck-Institut fur Radioastronomie, Auf
dem Hugel 69, D-53121 Bonn, Germany),
AW(Observatoire de Paris-Meudon, 92195 Meudon,
France), AX(Leiden Observatory, Niels Bohrweg 2,
2333 CA Leiden, The Netherlands)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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