Near Infrared Surface Photometry of NGC1068

  • Evencio Mediavilla Gradolph
  • Carlos Sanchez Magro
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


Near infrared scans of NGC1068 with 20 and 5 arcsecs apertures have been used to isolate the nuclear emission. The nuclear near infrared emission can be explained by a combination of dust clouds at different positions and temperatures. The same scans have been used for a tentative detection of the ring in the L band.

NGC 1068 has been observed at the near infrared bands J H K L. These observations are especially important in a spectral range where the contrast of the nucleus is maximum and where the size must change in scales well under the 1 arcsec region (Lebofsky et al. 1978; Rieke and Lebofsky, 1979) and the extended emission (Telesco et al. 1980; Lebofsky et al. 1978; Scoville et al. 1983). Also in this spectral region the spectral index can characterise the kind of emission related to QSO’s and active nuclei, an interesting point when there are clear indications that Seyfert 1 and Seyfert 2 are manifestations of similar phenomena (Penston and Perez, 1984).


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Beck, S.C. and Beckwith, S.: 1984, Ap.J., 279, 563ADSCrossRefGoogle Scholar
  2. Lebofsky, M.J., Rieke, G.H., and Kemp, J.C.: 1979, Ap.J. 222, 95ADSCrossRefGoogle Scholar
  3. Penston, M.V., Penson, M.J., Selmes, R.A., Becklin, E.E., and Neugebauer G.: 1974, MNRAS, 169, 357ADSGoogle Scholar
  4. Penston, M.V., and Perez, E.: 1984, MNRAS, 211, Short Communication, 33ADSGoogle Scholar
  5. Rickard, L.J., Patrick Palmer, Morris, M., Turner, B.E. and Zuckerman, B.: 1977, Ap.J., 213, 673ADSCrossRefGoogle Scholar
  6. Rieke, G.M., and Lebofsky, M.J.: 1979, ARAA, 17, 477ADSCrossRefGoogle Scholar
  7. Rieke, G.H.: 1984, Santa Cruz Workshop on Active Galaxies and QSO’s.Google Scholar
  8. Scoville, N.Z., Young, J.S., and Lucy, L.B.: 1983, Ap.J., 270, 443ADSCrossRefGoogle Scholar
  9. Telesco, C.M., Becklin, E.E., and Wynn-Williams, C.G.: 1980, Ap.J., 241, L69ADSCrossRefGoogle Scholar
  10. Telesco, C.M., Becklin,E.E., Wynn-Williams, C.G., and Harper, D.A.: 1984 Ap.J., 282, 427ADSCrossRefGoogle Scholar
  11. Ulrich, M.H.: 1984, IAU Symposium, 110, 73Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • Evencio Mediavilla Gradolph
    • 1
  • Carlos Sanchez Magro
    • 1
  1. 1.Instituto de Astrofisica de CanariasUniversidad de La LagunaTenerifeSpain

Personalised recommendations