Direct measurement of the jet geometry in Seyfert galaxies

Details Direct measurement of the jet geometry in Seyfert galaxies Direct measurement of the jet geometry in Seyfert galaxies

1999-09-14

arxiv.org/abs/astro-ph/9909242v1

Astronomy and Astrophysics

Astrophysics

11 pages, 1 figure, accepted for publication in The Astrophysical Journal Letters

Scientific paper

10.1086/312361

We demonstrate that, by combining optical, radio and X-ray observations of a Seyfert, it is possible to provide a direct measurement of the angle $\beta$ between the direction of the radio jet and the normal to the plane of the spiral host galaxy. To do so, we make the assumptions that the inner radio jet is perpendicular to the X-ray observed inner accretion disk, and that the observed jet (or the stronger component, if the jet is two-sided) is physically closer to Earth than the plane of the galaxy. We draw attention to the possibility of measurement producing a result which is not self-consistent, in which case for that galaxy, one of the assumptions must fail.

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