Fig. 2
Download original image
Measured X-ray hardness ratio HR12 of GJ 367 (red solid line, with red dotted lines indicating 1σ uncertainties) compared to the same hardness ratio for simulated X-ray spectra of different coronal temperatures (black dots and dashed line). GJ 367’s hardness ratio implies a mean coronal temperature in the 0.13–0.19 keV range, i.e. about 1.5–2.2 million K.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.