An extraordinary emission-line nebulosity associated with the Seyfert galaxy Markarian 335

Details An extraordinary emission-line nebulosity associated with the Seyfert galaxy Markarian 335 An extraordinary emission-line nebulosity associated with the Seyfert galaxy Markarian 335

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247...32h&link_type=abstract

Astrophysical Journal, Part 1, vol. 247, July 1, 1981, p. 32-41.

Astronomy and Astrophysics

Astrophysics

14

Astronomical Spectroscopy, Galactic Nuclei, Galactic Radiation, H Alpha Line, Interstellar Gas, Seyfert Galaxies, Active Galactic Nuclei, Astronomical Photometry, Emission Spectra, Galactic Structure, Interferometry, Nebulae, Velocity Distribution

Scientific paper

There is strong, albeit indirect, support for a model of active galactic nuclei of 'type 1' in which a small broadline region (BLR) with dimensions approximately 0.1 pc is surrounded by a much larger, narrow-line region (NLR) with dimensions of 100 pc or more. In every type 1 nucleus studied so far, the BLR is both spatially unresolved and coincident with the optical/radio/X-ray nucleus of the underlying galaxy. Attention is given to a noteworthy exception to these findings. This exception is related to the detection of an extended BLR associated with but clearly displaced from the nucleus (itself a Seyfert nucleus of type 1, or Sy 1) of Mrk 335. From images of Mrk 335 taken through a series of tuned narrow-band filters it is found that the extended BLR has dimensions of approximately 7 kpc and a projected separation from the nucleus of approximately 5 kpc.

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