Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.5904r&link_type=abstract
American Astronomical Society, 184th AAS Meeting, #59.04; Bulletin of the American Astronomical Society, Vol. 26, p.957
Astronomy and Astrophysics
Astronomy
1
Scientific paper
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 Stromgren y and on-line and off-line Hα filters. The off-line Hα filter was chosen to detect broadened Hα emission while the Stromgren y filter was used to eliminate stars. We have used image multiplication and subtraction to form contrast frames that would reveal 80 Angstroms wide emission if it were present. Preliminary results indicate that there are no broad Hα regions at the sensitivity level of our survey. However, we have discovered two Hα -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.
Jee R. O.
Joner Michael D.
Moody Joseph Ward
Roming Peter W. A.
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