Astrophysics and Space Science

, Volume 164, Issue 2, pp 257–262 | Cite as

The activity of the nuclei of spiral galaxies and IR-emission

  • H. M. Tovmassian


It is shown that the brightness of the spiral galactic nuclei at 10μ depends on the Byurakan type of galaxies: the brightness is higher in the case of galaxies of types 5, 2s, 4, and 2 with optical signs of activity in comparison with galaxies of types 3 and 1 without optical signs of activity. The noted difference is larger when nonstellar emission at 10μ is considered. The obtained results confirm conclusions made earlier on the activity of the nuclei of galaxies of types 5, 2s, 4, and 2.


Optical Sign Spiral Galaxy 
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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • H. M. Tovmassian
    • 1
  1. 1.Byurakan Astrophysical ObservatoryAcademy of SciencesArmeniaU.S.S.R.

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