Abstract
Observations of NGC 5194/95 with the Einstein HRI show a very strong nuclear X-ray source, surrounded by a diffuse flux, three point sources and the companion. The diffuse flux, which correlates well with the radio continuum, is likely to originate from the disk population with age ∼2·109 yrs. The large luminosity from the nuclear source, together with optical and radio observations, shows that it belongs to the low luminosity active nuclei, thus extending this class to luminosities less than ∼1040 erg/s.
Similar content being viewed by others
References
Crane, P.C. and van der Hulst, J.M. 1984, Bull. A.A.S. 16, 458.
Elvis, M. and Van Speybroeck, L. 1982, Ap. J. (Letters), 257, L51.
Elvis, M., Soltan, A., and Keel, W.C. 1984, Ap. J., 283, 479.
Fabbiano, G. and Trinchieri, G. 1984, Ap. J., in press.
Hummel, E. 1980, Astr. Ap. Suppl., 41, 151.
Keel, W.C. 1983, Ap. J. Suppl. 52, 229.
Long, K.S. and Van Speybroeck, L. 1983, in “Accretion Driven X-ray Sources”, (W. Lewin and E.P.J. van den Heuvel, eds.), Cambridge University Press, p. 41.
Palumbo, G.G.C., Fabbiano, G., Fransson, C., and Trinchieri, G. 1985, submitted to Ap. J.
Palumbo, G.G.C., Maccacaro, T., Panagia, N., Vettolani, and Zamorani, G. 1981, Ap.J., 247, 484.
Rose, J.A. and Searle, L. 1982, Ap. J., 253, 556.
Scoville, N. and Young, J.S. 1983, Ap. J., 265, 165.
Smith, J. 1982, Ap. J., 261, 463.
Trinchieri, G., Fabbiano, G. and Palumbo, G.G.C. 1985, Ap. J., to be published Feb. 15.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Palumbo, G.G.C., Fabbiano, G., Fransson, C. et al. An X-ray study of M51 (NGC 5194) and its companion (NGC 5195). Space Sci Rev 40, 643–646 (1985). https://doi.org/10.1007/BF00179881
Issue Date:
DOI: https://doi.org/10.1007/BF00179881