The infrared variability of a dust model for Seyfert galaxies |
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| Authors: | Noboru Kaneko Kiyotaka Toyama Masaki Nishimura |
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| Institution: | (1) Department of Physics, Faculty of Science, Hokkaido University, Sapporo, Japan |
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| Abstract: | Assuming a dust model of Reeset al. (1969), we study the time dependence of the infrared emission from grains which absorb variable ultraviolet radiation. A time scale for the variability is shown to be fairly small compared with the light travel-time across the infrared emitting region, of which size depends on the wavelength strongly. Comparison of calculated infrared light curves with observations of NGC 4151 leads to the conclusion that the variability at 2.2  is consistent with interpretation by the infrared emission on the basis of thermal process. |
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