Redfield, Seth

Contact Email: sredfiel@casa.colorado.edu
Institute: JILA, University of Colorado
First Coauthor: Thomas R. Ayres
Institute: CASA, University of Colorado
Second Coauthor: Jeffrey L. Linsky
Institute: JILA, University of Colorado
Research URL:http://casa.colorado.edu/~sredfiel/ColoradoLIC.html
Subject Area: Stellar Atmospheres, Circumstellar Material
Waveband: Far Ultraviolet
Technique: Spectroscopy
Presentation: Poster Display
Title: Dynamics of Coronal Iron Lines in Cool Stars based on FUSE and HST/STIS Observations.
Abstract: We present UV observations of coronal forbidden lines of highly ionized iron. Fe XXI $\lambda$1354 and Fe XII $\lambda$1242 have been observed by spectrographs aboard the Hubble Space Telescope (HST), and Fe XVIII $\lambda$974 has recently been identified in spectra taken by the Far Ultraviolet Spectroscopic Explorer (FUSE). Mass motions of hot gas in the corona are invariably tied to the heating mechanism of the corona. Observations of forbidden iron lines with these moderate to high resolution spectrographs provide a unique opportunity to study high temperature dynamics of the hot plasma in the corona of cool stars. We compare high temperature forbidden iron line observations of numerous cool stars and discuss the implications for coronal dynamics.