Warm Coronal Rain on Young Solar Analog Ek Draconis?

We report a moderate-resolution, 1290–1430 Å spectrum of young solar analog EK Draconis (HD 129333: G1.5 V), obtained by Cosmic Origins Spectrograph on Hubble Space Telescope . The 20 minute observation, remarkably, captured two distinct "flares" in the Si iv 1400 Å doublet ( T ∼ 6 × 10 4 K); very broad profiles of Si iv and the C ii 1335 Å multiplet ( T ∼ 3 × 10 4 K); and prominent Fe xxi λ1354 coronal forbidden line emission ( T ∼ 10 MK). The bright Si iv features are significantly redshifted compared to the milder, although still redshifted, equivalent components of solar-twin α 1 Cen (HD 128620: G2 V). The broad, shifted, flaring hot-line profiles of EK Dra indicate not only that the subcoronal plasma of the young sun is highly dynamic, but also that the Si iv -bearing gas must be continually accreting onto the lower atmosphere, perhaps the stellar equivalent of warm "coronal rain."