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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)

Abstract

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).

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References

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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

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