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2006AJ....132.1547L - Astron. J., 132, 1547-1554 (2006/October-0)

Determinations of temperature and density for solar-like stars using Si XI soft X-ray emission lines.


Abstract (from CDS):

We study the temperature and density sensitivities of the ratios of Si XI soft X-ray emission lines in the wavelength range of 43-54 Å. The typical temperature of formation of the analyzed lines is around 1.6 MK, which makes this analysis complementary to the analysis of He-like triplets, which are sensitive to hotter plasma. We present theoretical calculations and compare them with ratios obtained from high-resolution X-ray spectra of five solar-like stars: Procyon, α Cen A, α Cen B, ε Eri, and Capella. We find that our results are in good agreement with results obtained by other authors through different diagnostics, namely, the analysis of density- and temperature-sensitive He-like triplet lines. We further estimate the coronal pressure and filling factors from Si XI lines in this study.

Abstract Copyright:

Journal keyword(s): Atomic Data - Stars: Coronae - Stars: Late-Type - Techniques: Spectroscopic - X-Rays: Stars

Simbad objects: 5

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