Table 1
Physical parameters of the X-ray emission from EX Lup obtained by spectral fitting of the pn data.
| Soft spectral component | Hard spectral component | ||||||||||||
| Perioda | NH,s | Ts | E Ms | NH,h | Th | E Mh | FXb | LX,sc | LX,hc | χ2 / d.o.f. | Qd | ||
| (1020 cm-2) | (MK) | (1051 cm-3) | (1022 cm-2) | (MK) | (1051 cm-3) | (erg cm-2 s-1) | (1028 erg s-1) | ||||||
|
|
|||||||||||||
| L | 3.6 | 4.7 | 4.2 | 2.7 | 53 | 18.3 | 0.54 × 10-13 | 4.3 | 29.2 | 10.38/12 | 0.58 | ||
| ≤14.8 | 3.6–7.9 | 2.9–7.9 | 0.4–7.3 | ≥18 | 7.9–114 | ||||||||
| F | =3.6 | 4.2 | 5.7 | 5.2 | 61 | 102 | 2.3 × 10-13 | 5.6 | 170 | 4.03/8 | 0.85 | ||
| 3.0–6.8 | 3.9–7.5 | 2.6–11.2 | ≥19 | 51–594 | |||||||||
Notes. The model used for the photoelectric absorption is wabs. The model used for the continuum and emission lines produced by an optically thin plasma in thermal collisional ionization equilibrium is vapec, using the abundance pattern of the XMM-Newton Extended Survey of the Taurus molecular cloud (XEST; Güdel et al. 2007a). The second line of each period corresponds to the confidence intervals at the 90% confidence level (i.e., Δχ2 = 2.706 for each parameter of interest).
X-ray luminosity corrected for the absorption in the 0.2–10 keV energy range, at a distance of 155 pc (Lombardi et al. 2008).
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