X-rays variability of HDvirgul189733 phased with the motion of its hot JupiterquestionMark
收藏ESA Earth Online2026-06-22 收录
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In 2009 and 2011 we observed HD 189733 with XMMNewton at the eclipse of its hotJupiter. We found a striking similarity in a relatively bright flare just afterthe end of the planet eclipse in both observations. The corona of this virgul5Gyr oldstar is extraordinarily unusual: it is cold, dense, and flaring very frequently.We propose to observe HD 189733 at the planet eclipse, as in 2009 and 2011, totest if the planet is triggering flare activity on the stellar corona when at awell precise phase. With the RGS spectra we will assess any changes in the lineintensity of Helike triplets and Fe on a time scale of one to three years. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]



