Open Access
Table 3
Flare parameters for Teegarden’s star from XMM-Newton flares.
Parameter | Flare III | Flare IV |
---|---|---|
Time of flare peak (U band, UT) | 18:40:50 | 20:49:50 |
Time of flare peak (X-ray, UT) | 18:42:30 | n.a. |
Rise time (s; U band) | ≈10 | 5 |
Rise time (s; X-ray) | 100 | n.a. |
Decay time (s; U band) | 390 | |
Decay time (s; X-ray) | 175 | 5 |
U band rate (at peak, cts/s) | 55 | 37 |
U band luminosity (at peak, erg s−1) | 1.25 × 1028 | 8.4 × 1027 |
X-ray rate (EPIC, at peak, cts/s) | 0.7 | n.a. |
X-ray luminosity (at peak, erg s−1 ) | ≈9 × 1026 | n.a. |
Total count U band | 1488 | 196 |
Total net count X-ray | ≈120 | <6 |
Total X-ray fluence (erg) | 1.6 × 1029 | <9 × 1026 |
Total U band fluence (erg) | 3.4 × 1029 | 4.3 × 1028 |
Tflare = 15 000 K | ||
Peak flare flux (erg s−1) | 1.1 × 1029 | 7.2 × 1028 |
Total flare energy (erg) | 2.9 × 1030 | 3.8 × 1029 |
Flare area (cm2) | 3.7 × 1016 | 2.5 × 1016 |
Tflare = 8000 K | ||
Peak flare flux (erg s−1) | 1.0 × 1029 | 6.9 × 1028 |
Total flare energy (erg) | 2.8 × 1030 | 3.7 × 1029 |
Flare area (cm2) | 4.4 × 1017 | 3.0 × 1017 |
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