Evolutionary sequence of Seyfert galaxies

  • David L. Blank
  • Noam Soker
VII. Cosmological and Evolutionary Considerations
Part of the Lecture Notes in Physics book series (LNP, volume 307)


We suggest that there exists an evolutionary sequence from Seyfert 2 to Seyfert 1 galaxies. We review observations which support this suggestion and the idea that the main parameter is the dust content in and around the Broad Line Region (BLR). We propose that Seyfert 2 galaxies evolve into Seyfert 1 Galaxies by expelling the dust from the BLR. It is further supposed that the dust is due to the interaction of the host galaxy with a second galaxy. The amount of dust needed is less than that found in a typical spiral galaxy.


Evolutionary Sequence Host Galaxy Central Black Hole Dust Content Seyfert Galaxy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • David L. Blank
    • 1
  • Noam Soker
    • 1
  1. 1.Department of AstronomyUniversity of VirginiaCharlottesvilleUSA

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