The continuum of type 1 Seyfert galaxies. II - Separating thermal and nonthermal components

N. P. Carleton, Martin Elvis, G. Fabbiano, S. P. Willner, A. Lawrence, Martin Ward

Research output: Contribution to journalArticlepeer-review

Abstract

The authors attempt to distinguish between thermal and nonthermal contributions to the 1 to 100 μm continuum in a sample of active galactic nuclei. The sample is dominated by the members of a hard X-ray selected sample; most members are Seyfert 1 galaxies. It is postulated that the nonthermal continua of all the objects are intrinsically similar, with the apparent "steep spectrum" objects showing a combination of reddening at shorter wavelengths and thermal emission by dust at longer wavelengths. Various evidence is presented lending strong support to this interpretation. The spatial and temperature distribution of the infrared-emitting dust component in the nuclei of the sample galaxies is discussed.
Original languageEnglish
Pages (from-to)595-611
JournalAstrophysical Journal
Volume318
DOIs
Publication statusPublished - 1 Jul 1987

Keywords

  • Astronomical Spectroscopy
  • Continuous Spectra
  • Galactic Nuclei
  • Infrared Spectra
  • Seyfert Galaxies
  • Thermal Emission
  • Balmer Series
  • Emission Spectra
  • Spectrum Analysis
  • X Ray Spectra

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