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EVN Observations of the OH megamaser galaxies Mrk 231 and IC 694

Published online by Cambridge University Press:  03 August 2017

Hans-Rainer Klöckner  and
Willem A. Baan
Hans-Rainer Klöckner
Affiliation:
Kapteyn Institute & ASTRON, P.O. Box 800, 9700 AV Groningen, The Netherlands
Willem A. Baan
Affiliation:
ASTRON, Westerbork Observatory, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands

Abstract

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We present EVN observations of hydroxyl (OH) main-line emission in two megamaser sources Mrk 231 and IC 694. The observations indicate that the broad maser emission lines originate within the nuclear regions. A single 1667 MHz main-line feature is seen at the nucleus of IC 694. In Mrk 231 both main-lines were observed in an extended “half-circular” region of 150 pc by 50 pc surrounding the radio nucleus.

Type
Part 5. Extragalactic Nuclear Masers
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 430 - 433
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Alonso-Herrero, A., Rieke, G., Rieke, M., & Scoville, N. 2000 ApJ, 532, 845 Google Scholar
Baan, W. A., Wood, P. A. D., & Haschick, A. D. 1982, ApJ, 260, L4 Google Scholar
Baan, W. A. 1985, Nature, 315, 26 Google Scholar
Baan, W. A. & Haschick, A. 1990, ApJ, 364, 65 CrossRefGoogle Scholar
Baan, W. A. 1989, ApJ, 338, 804 CrossRefGoogle Scholar
Canalizo, G. & Stockton, A. 2000, ApJ, 120, 1750 Google Scholar
Carilli, C. L., Wrobel, J. M., & Ulvestad, J. S. 1998, ApJ, 115, 928 CrossRefGoogle Scholar
Diamond, P. J., Lonsdale, C. J., Lonsdale, Ca. J., & Smith, H. E. 1999, ApJ, 511, 178 Google Scholar
Downes, D. & Solomon, P. M. 1998, ApJ, 507, 615 Google Scholar
Klöckner, H.-R. & Baan, W. A. 2001, Nature, submitted Google Scholar
Lonsdale, C. J., Lonsdale, Ca. J., & Smith, H. E. 1998, ApJ, 493, L13 Google Scholar
Lonsdale, C. J. 2001, PASP this issue Google Scholar
Pihlström, Y. M. 2001, PASP this issue & private communication Google Scholar
Polatidis, A. G. & Aalto, S. 2000, IAU Symp. 205, in the press Google Scholar
Richards, A. et al. 2000, IAU Symp. 205, in the press Google Scholar
Ulvestad, J. S., Wrobel, J. M., & Carilli, C. L. 1999, ApJ, 516, 127 Google Scholar