Table 2
Spectral model for the inner wind-wind collision zone emission in η Car.
| Phase | FX obs | NH 1 | kT1 | EM1 | NH 2 | kT2 | EM2 |  |
|---|---|---|---|---|---|---|---|---|
| 10−11 erg cm−2 s−1 | 1022 cm−2 | keV | 1057 cm−3 | 1022 cm−2 | keV | 1057 cm−3 | ||
| 0.979 | 20.8, 19.8 |  |
 |
 |
 |
 |
 |
1.04 (264) |
| 0.069 | 4.9, 4.5 |  |
 |
 |
 |
 |
 |
0.95 (109) |
| 0.160 | 3.9, 3.4 | 3.5 |  |
 |
3.5 |  |
 |
1.02 (98) |
| 0.253 | 3.6, 3.1 | 3.1 |  |
 |
3 1 |  |
 |
0.92 (98) |
Notes. The observed FX is the total source flux in the 0.2–10.0 keV and 2–10 keV bands. The η Car spectrum includes emission from the surrounding nebula, described by a 2-T vapec model: NH = 2 × 1021 cm−2, kT1 = 0.15 keV, kT2 = 0.7 keV, logEM1 = 55.80 (cm−3), logEM2 = 55.76 (cm−3), and N = 15 × solar, and solar abundances otherwise. For eRASS 3+4, a single NH was used.
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