The availability of IUE UV observations made it possible for Astronomers to investigate a large variety of phenomena which are expected to take place in cool stars. The IUE database is the richest collections of information on one of the main chromoshperic diagnostics, say the Mg II h and k doublet. Indeed these resonance lines, easily identifiable in IUE spectra, are powerful tracers of the upper photosphere structure and of its interaction with the lower chromosphere. This Atlas, devoted to low resolution spectra of K-type stars, is meant to provide a uniform collection of template spectral distributions for studies of both individual stars and integrated old stellar populations. To this aim, the main body of the Atlas conatins average spectra derived from Long Wavelength Large aperture images, while only the list of the other available images is given in Appendix A.
ESA Special Publication
- Pub Date:
- UNIFORM LOW DISPERSION ARCHIVE;
- K STARS;
- ULTRAVIOLET SPECTRA