Observations from 1 to 20 microns of low-luminosity active galaxies

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

Research output: Contribution to journalArticlepeer-review


The 1-20 micron photometry of Liners (Low Ionization Nuclear Emission-line Regions), star burst nuclei, and high-excitation (mostly Seyfert 2) nuclei are presented and discussed. Liners have strong, flattish 10-20 micron excesses but are dominated by a stellar population through 1-5 micron. By contrast, most type 2 Seyfert galaxies and all star-burst nuclei have flux distributions that are flat through 1-5 microns, and steeply rising through 10-20 microns. The 1-5 micron flux distributions of type 2 Seyfert galaxies and starburst nuclei can be explained by mixtures of stellar emission, recombination radiation, and hot dust, although a nonthermal component is likely in a few objects. One Liner, NGC 3079, was found to be extended to 10 microns. A map which shows the 10-micron and optical maxima to differ by 6 arcsec is presented.
Original languageEnglish
Pages (from-to)117-127
JournalAstrophysical Journal
Publication statusPublished - 1 Apr 1985


  • Active Galaxies
  • Galactic Nuclei
  • Infrared Stars
  • Seyfert Galaxies
  • Spiral Galaxies
  • Stellar Evolution
  • Astronomical Photometry
  • Emission Spectra
  • Interstellar Matter
  • Line Spectra
  • Radiant Flux Density
  • Radiative Recombination
  • Starburst Galaxies


Dive into the research topics of 'Observations from 1 to 20 microns of low-luminosity active galaxies'. Together they form a unique fingerprint.

Cite this