An Imaging Search for Non-Nuclear Seyfert Activity in M101

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Session 59 -- Low Luminosity AGNs and Active Galaxies
Display presentation, Thursday, 2, 1994, 9:20-6:30

[59.04] An Imaging Search for Non-Nuclear Seyfert Activity in M101

P.W.A. Roming, J.W. Moody, M.D. Joner (BYU), R.O. Jee (TRW)

It has been speculated that dark halos surrounding galaxies may contain black holes. If so, then they should also be found in galaxian disks just as high velocity halo stars are found in the disk of the Milky Way. If Seyfert activity is caused by super-massive black holes as is currently thought, then it is reasonable to expect that halo black holes would manifest themselves as Seyfert-like activity in galaxy disks. To test this idea, observations of the Sc(s)I galaxy M101 were made using the CWRU/NOAO 24/36" Burrell Schmidt telescope. CCD images were taken through Str\"omgren y and on-line and off-line H$\alpha$ filters. The off-line H$\alpha$ filter was chosen to detect broadened H$\alpha$ emission while the Str\"omgren y filter was used to eliminate stars. We have used image multiplication and subtraction to form contrast frames that would reveal 80 \AA wide emission if it were present. Preliminary results indicate that there are no broad H$\alpha$ regions at the sensitivity level of our survey. However, we have discovered two H$\alpha$-bright regions on either side of the nucleus of M101 which have an arrangement and morphology that are suggestive of a double-sided jet. We report on the results of this study with emphasis on the jet-like structures including, we hope, their spectra which will be obtained in May of 1994.

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