An infrared study of hot dust in quasars using prism spectrophotometry

Details An infrared study of hot dust in quasars using prism spectrophotometry An infrared study of hot dust in quasars using prism spectrophotometry

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404...94k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 1, p. 94-99.

Astronomy and Astrophysics

Astronomy

37

Black Holes (Astronomy), Cosmic Dust, Infrared Astronomy, Quasars, Spectrophotometry, Black Body Radiation, Emission Spectra, Infrared Spectra, Red Shift, Thermal Emission

Scientific paper

Low-resolution near-infrared spectra were obtained for 14 quasars with redshift z less than 0.3. The observed continua from 0.95 to 2.5 microns were reproduced remarkably well with a combination of two radiation components, i.e., the power law and the blackbody radiation which are, respectively, dominated at shorter than about 1.2 micron and longer than 1.5 micron. The longer part of the spectra fit a single-temperature blackbody of 1470 + 90 K which is attributable to the thermal emission from hot dust grains heated by the central power source. The flux ratio of the blackbody of the power-law component ranges by a factor of 6. It was found that an IRAS color selected sample tended to have a larger flux ratio as compared to non-IRAS quasars.

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