IRAS Observations of NGC 4696 — Cooling or Evaporation Flow?

  • T. de Jong
  • H. U. Nørgaard-Nielsen
  • H. E. Jørgensen
  • L. Hansen
Conference paper

Abstract

We have analysed 60 and 100 μm IRAS observations of NGC 4696, the central elliptical galaxy of the Centaurus cluster. Ground-based optical photometry and spectroscopic data as well as ultraviolet (IUE) and X-ray (EINSTEIN) measurements constrain the interpretation of the infrared data. The dust responsible for the infrared emission has a temperature of 24 K, a total mass of 2.5 106 M and emits a total infrared luminosity of 1.5 109 L . It is heated by photons from the interstellar radiation field in the elliptical galaxy and by hot electrons from the X-ray gas. About 10 % of the radiating dust mass is located in a small ”horse shoe” shaped dust lane in the centre of NGC 4696. We argue that the other 90 % is distributed over a much larger region (R ≃ 10 kpc) in the galaxy.

Keywords

Dust Shoe 

References

  1. T. de Jong, H.U. Nørgaard-Nielsen, H.E. Jørgensen, L. Hansen: Astron. Astrophys., in press (1989)Google Scholar
  2. W.B. Sparks, F. Macchetto, D. Golombek: Astrophys. J., in press (1989)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • T. de Jong
    • 1
  • H. U. Nørgaard-Nielsen
    • 2
  • H. E. Jørgensen
    • 3
  • L. Hansen
    • 3
  1. 1.Astronomical Institute “Anton Pannekoek”University of AmsterdamAmsterdamThe Netherlands
  2. 2.Danish Space Research InstituteLyngbyDenmark
  3. 3.Copenhagen University ObservatoryCopenhagenDenmark

Personalised recommendations