High-resolution X-ray spectroscopy of Procyon by Chandra and XMM-Newton
Abstract
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 Å 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 ~ 4.1 x 1050 cm-3 with a peak between 1 and 3 MK. No indications for a dominant hot component (T ~> 4 MK) were found. We present additional evidence for the lack of a solar-type FIP-effect, confirming earlier EUVE results.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 2002
- DOI:
- 10.1051/0004-6361:20020529
- arXiv:
- arXiv:astro-ph/0204385
- Bibcode:
- 2002A&A...389..228R
- Keywords:
-
- stars: individual: Procyon;
- alpha Canis Minoris;
- stars: coronae;
- stars: late-type;
- stars: activity;
- X-rays: stars;
- Astrophysics
- E-Print:
- 10 pages, 9 figures, A&