Sanz-Forcada, Jorge

Contact Email: jsanz@cfa.harvard.edu
Institute: Harvard-Smithsonian Center for Astrophysics
Research URL:http://cfa-www.harvard.edu/~jsanz/
Presenting Thesis: Yes
Subject Area: Stellar Atmospheres, Circumstellar Material
Waveband: Extreme Ultraviolet
Technique: Spectroscopy
Presentation: Oral Contribution: Monday
Title: Emission Measure Distributions in Active Binary Systems
Abstract: Generally, the study of coronal structure in other cool stars different from the Sun is limited to 2-T or 3-T emission measure fits, and only a few cases are described with a continuous distribution of values in temperature. In this work it is presented the study of 19 active binary systems and 5 single stars, the widest sample of stars to date for which the emission measure distribution is described as a continuous distribution. The analysis covers the range log T(K)=4.0-7.4, making use of EUVE iron lines and IUE data to describe the behavior in the corona and transition region. Conclusions are derived from the quiescent and flaring stages in 5 active binary systems, and the whole sample includes a variety of spectral types in giant and dwarf stars. The calculated distributions do not match, totally or partially, those predicted by current models.