POSTER PAPER 5.01
The Structure and Energy Balance of the Chromosphere, Transition Region and Corona of Epsilon Eri (K2 V)
C. Jordan, S. A. Sim, A. D. McMurry
Institute: Department of Physics (Theoretical Physics), University of
Oxford
Institute: Institute of Theoretical Astrophysics, University of Oslo
Contact Email: cj@thphys.ox.ac.uk
Abstract:
Observations of Epsilon Eri have been made with the Space Telescope Imaging
Spectrograph (STIS) on the Hubble Space Telescope ( HST). The
magnetic dipole lines of Fe XII at 1242.20 and 1349.38 A have been
observed. Using lines of Si III and
O IV, the mean electron pressure is 4.8x1015K cm-3.
We discuss how comparisons between theoretical and observed emission measure
distributions can be used to investigate the inhomogeneity of the corona
and lower transition region. The observed line widths can be used to
investigate the non-thermal heating. Evidence of two components to some line
profiles is found.
Index Keywords: Epsilon Eri
Next: Pagano
Up: Poster Index
Up: Top Index
Manuscript submitted: 2001-Aug-22
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.