![]() |
Figure 1: Light curves of the binaries EQ Peg and AT Mic and the single stars AD Leo and EV Lac; PN (+MOS2/red) data, 100 s binning. Frequent flaring is observed on various timescales; selected flaring periods are indicated by horizontal arrows. |
| Open with DEXTER | |
![]() |
Figure 2: RGS spectra of the sample stars, the most prominent emission features are labelled. |
| Open with DEXTER | |
![]() |
Figure 3: PN spectra of the analysed M dwarfs; top to bottom: AT Mic (red), AD Leo (green), EV Lac (blue), EQ Peg (black). ( Colour figure in electronic version.) |
| Open with DEXTER | |
![]() |
Figure 4: EMDs as derived with the 6-T model and scaled with the summed abundance of iron and oxygen, total observation each (RGS: Asterisks, MOS: Diamonds, PN: Squares). |
| Open with DEXTER | |
![]() |
Figure 5: Elemental abundances in stellar coronae relative to solar photospheric values vs. FIP for our sample stars; an inverse FIP effect is present in all stars. Each star is shifted by one solar abundance on the vertical axis, the dashed lines indicate 0.5 solar abundance in each case. |
| Open with DEXTER | |
![]() |
Figure 6: Spectra of AT Mic during different states of activity, PN data from selected time-intervals as defined in Table 3 (high: black, medium: green, qq: red). ( Colour figure in electronic version.) |
| Open with DEXTER | |
![]() |
Figure 7: EMDs of our sample M dwarfs in different states of activity derived from PN data. The upper plot shows the flaring phase, for AT Mic the medium activity phase is additionally plotted as a dashed line while the lower plot shows the quasi-quiescent state. Undetected components are plotted with their upper limits, denoted by downward arrows. |
| Open with DEXTER | |