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Table 5
Model parameters for the Cygnus Loop.
| Parameters | Values |
|---|---|
| SNR dynamics | |
| Distance(a): D | 735 pc |
| Radius(a): R | 18.5 pc |
| Age(a): tage | 21 000 yr |
| Shock-cloud interaction(b): tc | ~1200 yr |
| Explosion energy(a): ESN | 7 × 1050 erg |
| N-E region parameters (non-radiative shocks) | |
| Density(a): n0,cl | 1.5 cm−3 |
| Magnetic Field: B0,cl | 3.0 μG |
| Cloud shock velocity(a): vs | 244 km s−1 |
| Cutoff energy(c): pmaxc (η = 7) | 15 GeV |
| Break energy(c): pbrc (T = 104 K) | 62 GeV |
| Energy in CRs(c): Wtot | 1.4 × 1049 erg |
| e/p ratio(c): Kep (at 10 GeV) | 0.01 |
| West region parameters (radiative shocks) | |
| Density(b): n0,cl | 6 cm−3 |
| Cooled gas density: nm | 293 cm−3 |
| Magnetic Field(b): B0,cl | 6 μG |
| Compressed Field: Bm | 244 μG |
| Cloud shock velocity(b): vs | 130 km s−1 |
| Cutoff energy(c): pmaxc × s1∕3 (η = 7) | 20 GeV |
| Break energy(c): pbrc × s1∕3 (T = 104 K) | 70 GeV |
| Filling factor(c): f | 0.013 |
| Intercloud region | |
| Density(a): n0 | 0.4 cm−3 |
| Magnetic Field: B0 | 2 μG |
| Shock velocity(a): vs | 350 km s−1 |
Notes. (a) Taken from Fesen et al. 2018. (b) Taken from Raymond et al. 2020. (c)Fit to the data.
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