Far-infrared brightness temperature of Saturn's disk and rings

Daniel, R. R. ; Ghosh, S. K. ; Iyengar, K. V. K. ; Rengarajan, T. N. ; Tandon, S. N. ; Verma, R. P. (1982) Far-infrared brightness temperature of Saturn's disk and rings Icarus, 49 (2). pp. 205-212. ISSN 0019-1035

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0019-1035(82)90072-0


We present far-infrared observations of Saturn in the wavelength band 76-116 μm, using a balloon-borne 75-cm telescope launched on 10 December 1980 from Hyderabad, India, when B', the Saturnicentric latitude of the Sun, was 4° .3. Normalizing with respect to Jupiter, we find the average brightness temperature of the disk-ring system to be 90±3° K. Correcting for the contribution from rings using experimental information on the brightness temperature of rings at 20 μm, we find TD, the brightness temperature of the disk, to be 96.9±3.5° K. The systematic errors and the correction for the ring contribution are small for our observations. We, therefore, make use of our estimate of TD and earlier observations of Saturn when contribution from the rings was large and find that for wavelengths greater than 50 μm, there is a small reduction in the ring brightness temperature as compared to that at 20 μm.

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ID Code:51664
Deposited On:29 Jul 2011 04:23
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