Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cha%26a..20..393w&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 20, Issue 4, p. 393-401.
Astronomy and Astrophysics
Astrophysics
Scientific paper
In the present paper, the continua of four PG quasars from X-ray regions through the far-infrared are discussed. The spectral energy distributions show a variety of shapes which can be explained by combining five components in varying proportions. Nonthermal emission and thermal dust emission both contribute substantially to the infrared bump. For all four quasars discussed, the nonthermal emission, spanning at least five decades of frequencies, is found by our model to have a power-law index near unity. The nonthermal process is found to have produced the uniform-energy-distribution status of νfν const. The contributions from the host galaxy and starburst region near the nuclei are negligible in the infrared for luminous quasars.
Wu Jian-Xin
Zhou You-Yuan
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