Linear and Circular Polarization from Sagittarius A* and M81*

Details Linear and Circular Polarization from Sagittarius A* and M81* Linear and Circular Polarization from Sagittarius A* and M81*

2003-02-11

arxiv.org/abs/astro-ph/0302228v1

Astrophys.Space Sci. 288 (2003) 69-76

Astronomy and Astrophysics

Astrophysics

to appear in Circular Polarization Workshop Proceedings, Fender & Macquardt, eds., 10 pages, 5 figures

Scientific paper

10.1023/B:ASTR.0000004995.36315.

We describe recent results for Sgr A*, M81* and other low luminosity active galactic nuclei. We have conducted linear and circular polarimetry over a frequency range of 1.4 to 230 GHz and detected a variety of phenomena. The polarization properties of the studied sources are substantially different from higher powered AGN. In the case of Sgr A*, we are able to eliminate ADAFs and Bondi-Hoyle flows as possible models based on mm $\lambda$ polarimetry. Our success with Sgr A* demonstrates that we can learn about the nature of accretion and outflow in these sources with unprecedented detail. We may also develop probes of general relativity in the strong-field limit.

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