Scintillation in the Circinus Galaxy water megamasers
Astrophysics
2009-11-10 v1
Abstract
We present observations of the 22 GHz water vapor megamasers in the Circinus galaxy made with the Tidbinbilla 70m telescope. These observations confirm the rapid variability seen earlier by Greenhill et al (1997). We show that this rapid variability can be explained by interstellar scintillation, based on what is now known of the interstellar scintillation seen in a significant number of flat spectrum AGN. The observed variability cannot be fully described by a simple model of either weak or diffractive scintillation.
Cite
@article{arxiv.astro-ph/0411320,
title = {Scintillation in the Circinus Galaxy water megamasers},
author = {J. N. McCallum and S. P. Ellingsen and D. L. Jauncey and J. E. J. Lovell and L. J. Greenhill and .},
journal= {arXiv preprint arXiv:astro-ph/0411320},
year = {2009}
}
Comments
10 pages, 5 figures. AJ accepted