Journal
ASTRONOMY & ASTROPHYSICS
Volume 389, Issue 1, Pages 228-238Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20020529
Keywords
stars : individual : Procyon, alpha Canis Minoris; stars : coronae; stars : late-type; stars : activity; X-rays : stars
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We report the analysis of the high-resolution soft X-ray spectrum of the nearby F-type star Procyon in the wavelength range from 5 to 175 Angstrom obtained with the Low Energy Transmission Grating Spectrometer (LETGS) on board Chandra and with the Reflection Grating Spectrometers (RGS) and the EPIC-MOS CCD spectrometers on board XMM-Newton. Line fluxes have been measured separately for the RGS and LETGS. Spectra have been fitted globally to obtain self-consistent temperatures, emission measures, and abundances. The total volume emission measure is similar to4.1 x 10(50) cm(-3) with a peak between 1 and 3 MK. No indications for a dominant hot component (T greater than or similar to 4 MK) were found. We present additional evidence for the lack of a solar-type FIP-effect, confirming earlier EUVE results.
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