Hostname: page-component-7c8c6479df-ph5wq Total loading time: 0 Render date: 2024-03-29T06:58:49.183Z Has data issue: false hasContentIssue false

Positional coincidence between an H2O maser and a plasma torus in NGC 1052

Published online by Cambridge University Press:  01 March 2007

S. Sawada-Satoh
Affiliation:
ASIAA, P.O. Box 23-141, Taipei 10617, TAIWAN email: sss@yamaguchi-u.ac.jp
S. Kameno
Affiliation:
Kagoshima University, Korimoto, Kagoshima, Kagoshima 890-0065 JAPAN
K. Nakamura
Affiliation:
Kagoshima University, Korimoto, Kagoshima, Kagoshima 890-0065 JAPAN
D. Namikawa
Affiliation:
Kagoshima University, Korimoto, Kagoshima, Kagoshima 890-0065 JAPAN
K. M. Shibata
Affiliation:
NAOJ, Osawa, Mitaka, Tokyo 181-8588 JAPAN
M. Inoue
Affiliation:
NAOJ, Osawa, Mitaka, Tokyo 181-8588 JAPAN
Rights & Permissions [Opens in a new window]

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.

We present VLBA observation towards the nucleus of a nearby radio galaxy NGC 1052. In NGC 1052, two-sided jet structure and a dense plasma circumnuclear torus with a radius of 0.7 pc have been found around the central mass. It emits a H2O megamaser, which is redshifted with respect to the systemic velocity of the galaxy (1491 kms−1) with a large velocity width of 100 kms−1 (FWHM). The maser gas is found at the inner jet components of both the approaching and receding jets. The maser gas is positionally coincident with a plasma torus. The maser gas in NGC 1052 could be explained as a circumnuclear torus or disk, as found for the nucleus of NGC 4258.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

Claussen, M. J., Diamond, P. J., Braatz, J. A., Wilson, A. S., & Henkel, C. 1998, ApJ 500, L129CrossRefGoogle Scholar
Kadler, M., Ros, E., Lobanov, A. P., Falcke, H., & Zensus, J. A. 2004, A&A 426, 481Google Scholar
Kameno, S., Sawada-Satoh, S., Inoue, M., Shen, Z.-Q., & Wajima, K. 2001, PASJ 53, 169CrossRefGoogle Scholar
Kameno, S., Nakai, N., Sawada-Satoh, S., Sato, N., & Haba, A. 2005, ApJ 620, 145CrossRefGoogle Scholar
Maloney, P. R. 2002, PASA 19, 401CrossRefGoogle Scholar
Peck, A. B., Henkel, C., Ulvestad, J. S., Brunthaler, A., Falcke, H., Elitzur, M., Menten, K. M., Gallimore, J. F., 2002, ApJ 590, 149CrossRefGoogle Scholar
Vermeulen, R. C., Ros, E., Kellermann, K. I., Cohen, M. H., Zensus, J. A., & van Langevelde, H. J. 2003, A&A 401, 113Google Scholar