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High-Resolution Observations of the M81 Nucleus

  • William C. Keel (a1)

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The nucleus of the nearby Sb galaxy M81 has been shown to exhibit many of the features prominent in luminous active galactic nuclei: a variable, compact VLBI radio source (Kellermann et al. 1976, Jones, Sramek and Terzian 1981), a central variable X-ray source (Elvis and van Speybroeck 1982, Fabbiano 1988), and broad wings of Balmer emission similar in extent to those typical to Seyfert 1 nuclei (Peimbert and Torres-Peimbert 1981, Shuder and Osterbrock 1981). The nucleus also shows a narrow-line spectrum in many ways typical of LINERs (Heckman 1980), now known to be representative of early-type spiral nuclei in general.

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References

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Dressler, A. and Richstone, D. 1988, Astrophys. J., 324, 701.
Elvis, M. and van Speybroeck, L. 1982, Astrophys. J. (Lett.), 257, L51.
Fabbiano, G. 1988, Astrophys. J., 325, 544.
Heckman, T.M. 1980, Astron. Astrophys., 87, 152.
Jones, D.L., Sramek, R.A. and Terzian, Y. 1981, Astrophys. J., 246, 28.
Kellermann, K.I., Shaffer, D.B., Pauliny-Toth, I.I.K., Preuss, E. and Witzel, A. 1976, Astrophys. J. (Lett), 210, L121.
Peimbert, M. and Torres-Peimbert, S. 1981, Astrophys. J., 245, 845.
Shuder, J.M. and Osterbrock, D.E. 1981, Astrophys. J., 250, 55.

High-Resolution Observations of the M81 Nucleus

  • William C. Keel (a1)

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