O Ⅵ + Lyβ + C Ⅱ from Starburst and Poststarburst Galaxies. I. Stellar Library and Evolutionary Synthesis Profiles

摘要

Evolutionary synthesis models of a stellar population in the far-ultraviolet are presented. The spectra include the lines O VI λλ1032, 1038, Lyβ, and C Ⅱ λλ1036, 1037. They are based on a stellar library built with observations of O and B stars collected with Copernicus and the Hopkins Ultraviolet Telescope (HUT). This library is used as input into an evolutionary synthesis code. The line profile of O VI + Lyβ + C Ⅱ is computed for different star formation histories (instantaneous burst and continuous star formation) and different assumptions about the initial mass function (IMF). The metallicity is near the solar value.