Table 3
Stellar input and hot gas properties for the X-ray enhancements in M31.
| Region | M⊙,max | Age | NSNe | PowSP,total | ESP,total | n | Pgas | Egas |
|---|---|---|---|---|---|---|---|---|
| (Myr) | (1037 erg s−1) | (1052 erg) | (f−1∕2 10−2cm−3) | ( f−1∕2 104cm−3 K) | ( f1∕2 1053 erg) | |||
| 1a | 20–30 | ~8 | 6 | ~3 | 1 | – | – | – |
| 1b | ~ 20 | ~ 10 | 16 | ~ 6 | ~ 2 | – | – | – |
| 1c | ~30 | 5–8 | 4–11 | 6−10 | 1−2 | – | – | – |
| 1d | ~30 | 5–8 | 6–18 | 10−20 | 2−3 | – | – | – |
| 1 (all) | – | – | – | – | – | 1.5 (1.0−2.3) | 8.2 (4.8−14.7) | 4.1 (2.4−7.4) |
| 2 | ~20 | ~10 | 15 | ~5 | ~2 | 0.3 (0.2−0.3) | 4.3 (3.5−4.9) | 1.2 (1.0−1.3) |
| 3 | ~30 | 5–8 | 14–41 | 20−40 | 5−8 | 0.2 (0.1−0.4) | 2.0 (1.1−7.3) | 0.3 (0.2−1.1) |
| 4 | 20−30 | ~8 | 17 | ~10 | ~3 | 0.4 (0.3−0.5) | 2.1 (1.8−2.5) | 0.9 (0.8−1.2) |
Notes. The values for the most massive star (M⊙,max) and age of the clusters were determined from the colour-magnitude diagrams in Fig. 11. The number of SNe (NSNe), current power (PowSP,total, and total energy ESP,total supplied by the stellar population were estimated from the Starburst 99 output shown in Fig. 12 and the age estimate. The values for n, P, and Egas were estimated using Eqs. (1)–(3), respectively. The intervals for the parameters are derived from the 90% confidence intervals of the X-ray spectral fit parameters in Table 2.
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.