IUE observations of faint comets |
| |
| Authors: | HA Weaver PD Feldman MC Festou MF A&#x;Hearn HU Keller |
| |
| Institution: | Physics Department, The Johns Hopkins University, Baltimore, Maryland 21218, USA;Space Physics Research Laboratory, University of Michigan, Ann Arbor, Michigan 48109, USA;Astronomy Program, University of Maryland, College Park, Maryland 20742, USA;Max-Planck-Institute für Aeronomie, Katlenburg-Lindau, Federal Republic of Germany |
| |
| Abstract: | Ultraviolet spectra of seven comets taken with the same instrument are presented. Comets P/Encke (1980), P/Tuttle (1980 h), P/Stephan-Oterma (1980 g), and Meier (1980 q) were observed during November-December 1980 with the International Ultraviolet Explorer (IUE) satellite observatory, while comets P/Borrelly (1980 i) and Panther (1980 u) were observed with IUE on 6 March 1981. The spectra of these comets are compared with those of comet Bradfield (1979 X), studied extensively earlier in 1980 with IUE, as well as with each other. In order to simplify the interpretation of the data and to minimize the dependence upon a specific model, the spectra are compared at approximately the same value of heliocentric distance whenever possible. Effects due to heliocentric velocity, geocentric distance, and optical depth are also discussed. All of the cometary spectra are remarkably similar, which suggests that these comets may have a common composition and origin. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
