New LETGS Observations of Procyon

Details New LETGS Observations of Procyon New LETGS Observations of Procyon

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2767b&link_type=abstract

Chandra proposal ID #11200282

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Scientific paper

We propose a 140 ksec observation of Procyon with Chandra's LETGS to double the available data. LETGS observations of Procyon are the Rosetta Stone for understanding the emission in the 30-170 A band of cool stars and thus of their coronal physics. The existing LEGTS observations of Procyon have provided evaluations of the EMD, abundances, and the FIP effect based on a handful of lines from K-shell C, N, and O, M-shell Fe and Ni, and L-shell Si, S, and Mg lines. Other lines (e.g., FeXI, FeXII, FeXIII, FeXIV, FeXV, FeXVI), could not be used due to blending. We now can overcome this limitation, allowing us to study Procyon's coronal physics with much higher reliability, check for consistency with EUVE data, and provide critical input for the success of the Solar Dynamics Observatory.

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