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The galactic nucleus compared to those of other galaxies

Published online by Cambridge University Press:  14 August 2015

Daniel W. Weedman
Daniel W. Weedman*
Affiliation:
Dyer Observatory, Vanderbilt University, Nashville, Tn

Abstract

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Observations at various wavelengths are considered for extragalactic nuclei and are compared to how our galaxy would appear at comparable distances. The starlight from our nucleus is similar to that from the spirals in the Virgo Cluster. Our nucleus would show no sign of activity to a distant observer, neither unusual color, nor emission lines, nor excess infrared radiation. For example, the luminosity in Hβ emission is about 1038 ergs s−1, which is 100 times fainter than that in the faintest Seyfert galaxy or emission line galaxy. It is also emphasized that there is no evidence from X-ray data for a massive, condensed object in the Galactic nucleus.

Type
VII. COMPARISONS OF OUR GALAXY WITH OTHER GALAXIES
Information
Symposium - International Astronomical Union , Volume 84: The Large-Scale Characteristics of the Galaxy , 1979 , pp. 407 - 412
Copyright
Copyright © Reidel 1979 

References

Augmann, H. H., and Low, F. J.: 1970, Astrophys. J. (Letters), 159, L159.CrossRefGoogle Scholar
Becklin, E. E., and Neugebauer, G.: 1968, Astrophys. J., 151, 145.Google Scholar
Becklin, E. E., and Neugebauer, G.: 1969, Astrophys. J. (Letters), 157, L31.CrossRefGoogle Scholar
Clark, G. W., Markert, T. H., and Li, F. K.: 1975, Astrophys. J. (Letters) 199, L93.CrossRefGoogle Scholar
Cominsky, L., Forman, W., Jones, C., and Tananbaum, H.: 1977, Astrophys. J. (Letters), 211, L9.CrossRefGoogle Scholar
de Vaucouleurs, G., and de Vaucouleurs, A.: 1973, Astron. and Astrophys., 28, 109.Google Scholar
Ekers, R. D.: 1974, in IAU Symp. 58 “Formation and Dynamics of Galaxies,” ed. Shakeshaft, J. R. (Dordrecht: Reidel), p. 257.CrossRefGoogle Scholar
Giaconni, R., Murray, S., Gursky, H., Kellogg, E., Schreier, E., Matilsky, T., Koch, D., and Tananbaum, H.: 1974, Astrophys. J. Suppl. 27, 37.Google Scholar
Hanes, D. A.: 1977, M.N.R.A.S., 180, 309.Google Scholar
Kellogg, E., Gursky, H., Murray, S., Tananbaum, H., and Giaconni, R.: 1971, Astrophys. J. (Letters), 169, L99.CrossRefGoogle Scholar
Krugel, E., and Tutukov, A. V.: 1978, Astron. and Astrophys., 63, 375.Google Scholar
Lightman, A. P., Giaconni, R., and Tananbaum, H.: 1978, Astrophys. J. (in press).Google Scholar
Mezger, P. G., Churchwell, E. B., and Pauls, T. A.: 1974, Proc. 1st European Astron. Meeting, Vol. 2 (Berlin: Springer-Verlag), p. 140.Google Scholar
Osmer, P. S., Smith, M. G., and Weedman, D. W.: 1974, Astrophys. J. 192, 279.Google Scholar
Osterbrock, D. E.: 1974, “Astrophysics of Gaseous Nebulae” (San Francisco: Freeman), p. 66.Google Scholar
Pauls, T., Mezger, P. G., and Churchwell, E.: 1974, Astron. and Astrophys., 34, 327.Google Scholar
Peimberg, M.: 1968, Astrophys. J., 154, 33.CrossRefGoogle Scholar
Rieke, G. H., and Lebofsky, M. J.: 1978, Astrophys. J. (Letters), 220, L37.Google Scholar
Tananbaum, H., Peters, G., Forman, W., Giaconni, R., Jones, C., and Avni, Y.: 1978, Astrophys. J. (in press).Google Scholar
Tifft, W. G.: 1969, Astron. J., 74, 354.Google Scholar
Wollman, E. R., Geballe, T. R., Lacy, J. H., Townes, C. H., and Rank, D. M.: 1977, Astrophs. J. (Letters), 218, L103.Google Scholar
Weedman, D. W.: 1977, Vistas in Astron., 21, 55.CrossRefGoogle Scholar