Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985lastr..99..271r&link_type=abstract
L'Astronomie (ISSN 0004-6302), vol. 99, June 1985, p. 271-279. In French.
Astronomy and Astrophysics
Astronomy
Infrared Astronomy, Stellar Spectrophotometry, Atmospheric Attenuation, Cosmology, Milky Way Galaxy, Orion Constellation, Photomultiplier Tubes, Solar System, Stellar Evolution, Telescopes
Scientific paper
A discussion of the results and methods of infrared astronomy, which concerns the electromagnetic radiation emitted by stars in the wavelength region from 0.8 micron to 1 mm, is presented. The limitations imposed by the atmosphere (atmospheric absorption) and the environment (parasitic emission) are considered. It is shown that by using carriers such as aircraft, balloons, and satellites (IRAS), which are capable of carrying out the experiments above the absorbant atmospheric layer, the limitations can be reduced. The measurement instruments, including bolometers based on the principle of thermometry, photoconductors, two-dimensional detectors based on integrated circuits and high-resolution spectrometers, are described. One of the most remarkable results of infrared astronomy is the discovery of internal energy sources in Jupiter, Saturn, and Uranus. Extragalactic and cosmologic astronomy are also considered.
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