The tilt of accretion disks in active spiral galaxies |
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| Affiliation: | 1. Dpto. Astrofísica y Física de la Atmósfera, Facultad de Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n. 28040, Madrid, Spain;2. Dpto. Matemática Aplicada, E. de Ingeniería Informática, Universidad de Valladolid, Pza, Alto de los Leones, 1. 40005 Segovia, Spain;3. Instituto de Ciencias Ambientales, Universidad de Castilla-La Mancha, Avda, Carlos III s/n. 45071, Toledo, Spain;4. Agencia Estatal de Meteorología, Leonardo Prieto Castro, 8. 28040 Madrid, Spain;1. Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain;2. Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain;1. Astronomy and Astrophysics Research Division Entoto Observatory and Research Center (EORC), Ethiopian Space Science and Technology Institute (ESSTI), Addis Ababa, 33679, Ethiopia;2. Mekelle University, College of Natural and Computational Sciences, Department of Physics, Mekelle, Ethiopia;3. Institute of Astronomy, Russian Acad. Sci., 48 Pyatnitskaya St., Moscow 119017, Russia |
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| Abstract: | How are accretion disks in Seyfert Galaxies oriented relative to the disk of the spiral galaxy which hosts them? This angle, β, serves as a link between the innermost workings of the black hole plus fueling accretion disk and the larger galaxy, either as the memory of the activity-provoking event, or as a diagnostic for the structure of the accretion disk.A sample culled from the literature shows that there is no tendency for accretion disks to align with the host galaxy disk and, in addition, there appears to be a zone of avoidance, where the accretion disks of no or very few active spirals are aligned within 20 degrees of the normal to the host galaxy disk. These results seem counter intuitive given the strong influence of angular momentum of the galaxy disk on material in that disk. |
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