Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-29T23:38:52.896Z Has data issue: false hasContentIssue false
  • English
  • Français

Accretion and Outflow Traced by H2O Masers in the Circinus AGN

Published online by Cambridge University Press:  13 May 2016

L.J. Greenhill ,
J.M. Moran ,
R.S. Booth ,
S.P. Ellingsen ,
P.M. McCulloch ,
D.L. Jauncey ,
R.P. Norris ,
J.E. Reynolds ,
A.K. Tzioumis  and
J.R. Herrnstein
L.J. Greenhill
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138 USA
J.M. Moran
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138 USA
R.S. Booth
Affiliation:
Onsala Space Observatory, SE-43992 Onsala, Sweden
S.P. Ellingsen
Affiliation:
University of Tasmania, Discipline of Physics, GPO Box 252-21, Hobart, TAS 1001 Australia
P.M. McCulloch
Affiliation:
University of Tasmania, Discipline of Physics, GPO Box 252-21, Hobart, TAS 1001 Australia
D.L. Jauncey
Affiliation:
Australia Telescope National Facility, PO Box 76, Epping, NSW 2121 Australia
R.P. Norris
Affiliation:
Australia Telescope National Facility, PO Box 76, Epping, NSW 2121 Australia
J.E. Reynolds
Affiliation:
Australia Telescope National Facility, PO Box 76, Epping, NSW 2121 Australia
A.K. Tzioumis
Affiliation:
Australia Telescope National Facility, PO Box 76, Epping, NSW 2121 Australia
J.R. Herrnstein
Affiliation:
Renaissance Technologies, 600 Route 25A, E. Setauket, NY 11733 USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The first VLBI images of H2O maser emission in the Circinus Galaxy AGN show both a warped, edge-on accretion disk and an outflow 0.1 to 1 pc from the central engine. The inferred central mass is 1.3 × 106 M⊙, while the disk mass may be on the order of 105 M⊙, based on a nearly Keplerian rotation curve. The bipolar, wide-angle outflow appears to contain “bullets” ejected from within < 0.1 pc of the central mass. The positions of filaments and bullets observed in the AGN ionization cone on kpc-scales suggest that the disk channels the flow to a radius of ∼ 0.4 pc, at which the flow appears to disrupt the disk.

Type
Molecules in External Galaxies
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 334 - 337
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Brotherton, M. S., Wills, B. J., Francis, P. J., Steidel, C. C. 1994, ApJ, 430, 495.Google Scholar
Curran, S., Johansson, L., Rydbeck, G., Booth, R. 1998, A&A, 338, 863.Google Scholar
Emmering, R. T., Blandford, R. D., Shlosman, I. 1992, ApJ, 385, 460.Google Scholar
Freeman, K. C., Karlsson, B., Lynga, G., Burrell, J. F., van Woerden, H., Goss, W. M., Mebold, U. 1977, A&A, 55, 445.Google Scholar
Greenhill, L. J., Ellingsen, S. P., Norris, R. P., Gough, R. G., Sinclair, M. W., Moran, J. M., Mushotzky, R. 1997, ApJ, 474, L103.CrossRefGoogle Scholar
Jones, K. L., Koribalski, B. S., Elmouttie, M., & Haynes, R. F. 1999, MNRAS, 302, 649.Google Scholar
Kartje, J. F., Königl, A., Elitzur, M. 1999, ApJ, 513, 180.Google Scholar
Matt, G., et al. 1999, A&A, 341, L39.Google Scholar
Neufeld, D. A, Maloney, P. R., Conger, S. 1994, ApJ, 436, L127.Google Scholar
Veilleux, S., Bland-Hawthorn, J., 1997 ApJ, 479, L105.Google Scholar