Spectral Indications of Density Variability in the Corona of AD Leonis

Details Spectral Indications of Density Variability in the Corona of AD Leonis Spectral Indications of Density Variability in the Corona of AD Leonis

2005-02-18

arxiv.org/abs/astro-ph/0502379v1

Astrophys.J. 622 (2005) L57-60

Astronomy and Astrophysics

Astrophysics

To be published in ApJ Letters

Scientific paper

10.1086/429487

Direct comparison of high-resolution X-ray spectra of the active dMe star AD Leo, observed three times with Chandra, shows variability of key density-sensitive lines, possibly due to flaring activity. In particular, a significant long-duration enhancement of the coronal density is indicated by the Ne IX and Si XIII He-like triplets, and possibly also by density-sensitive Fe XXI line ratios.

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