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Observations of Uranus and Neptune with ISO/LWS

Burgdorf, M. J., Davis, G. R., Griffin, M. J., Swinyard, B. M., Orton, G. S., Ade, Peter A. R., Naylor, D. A., Encrenaz, Th., de Graauw, Th. and Lellouch, E. 1998. Observations of Uranus and Neptune with ISO/LWS. Presented at: American Astronomical Society 193rd Meeting, Austin, TX, 5-9 Jan 1999. Bulletin of the American Astronomical Society. Bulletin of the American Astronomical Society , vol. 30. New York: American Astronomical Society, 12. (02).

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Abstract

We report on the results from observations of Uranus and Neptune obtained with the Infrared Space Observatory (ISO) Long Wavelength Spectrometer (LWS) during the routine phase of the mission. Spectra are presented which cover the wavelength range from 43 mu m to 90 mu m with a resolution of 0.29 mu m and from 90 mu m to 197 mu m with a resolution of 0.6 mu m. A high signal to noise ratio was achieved by combining the data of several identical calibration observations. Both Uranus and Neptune have smoothly varying continuum spectra. The brightness temperature of Neptune lies between 58 K and 62 K in the observed wavelength range. The surface brightness ratio of Neptune with respect to Uranus amounts between 60 mu m and 190 mu m to 0.97 +/- 0.02. We compare the overall shape of the measured spectra with models and discuss possible reasons for the small, but significant, differences between observation and theory.

Item Type: Conference or Workshop Item (Poster)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Additional Information: Abstract only. Session 12.(02) IR - UV New Missions
Publisher: American Astronomical Society
ISSN: 0002-7537
Last Modified: 04 Jun 2017 06:49
URI: http://orca.cf.ac.uk/id/eprint/65076

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