Beyond the T-1/2 Chromospheric Scaling Law
Abstract
We propose to study the effects of evolution off the main sequence on the chromospheres and transition regions of solar mass stars using both archive and new SWP-LO and LWR-HI exposures of G to K subgiants. We will measure the strengths of the strongest emission features of ions such as OI, CI, CII, CIV, SiII, SI-IV, and NV accessible in the short wavelength region, and the strength and shape of the MgII resonance lines in the long wavelength region. We will investigate correlations of these observable quantities with factors such as age, metallicity, vsini, and mass. This should enable us to extend the chromospheric/transition region activity versus age relationships known for main sequence stars to greater stellar ages.
- Publication:
-
IUE Proposal
- Pub Date:
- July 1984
- Bibcode:
- 1984iue..prop.1847L