Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004lnea....1..197g&link_type=abstract
Lecture Notes and Essays in Astrophysics, vol. 1, p. 197-208.
Astronomy and Astrophysics
Astronomy
Ultraviolet Astronomy, Ultraviolet Electromagnetic Range
Scientific paper
The UV range supplies a richness of experimental data which is unmatched by any other domain for the study of hot plasma with temperatures in between 10^4 K and 10^5 K; the high excitation lines and the resonance lines of the most abundant species in the Universe are observed in UV. Plasma at these temperatures is observed in all astrophysical environments extending over hot stars, cool stars and planetary atmospheres, gaseous nebulae, the warm and hot components of the ISM, circumstellar material, the close environment of black holes of all masses from X-Ray Binaries to Nuclei of Galaxies, accretion disks, and the intergalactic medium. In addition, the electronic transitions of the most abundant molecules, such as H_2, are observed in this range which is also the most sensitive to the presence of large molecules such as the PAHs. In this brief contribution, the situation of UV astronomy is outlined.
Gomez de Castro Ana Ines
Wamsteker Willelm
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