Table 3
Volume of emitting plasma, number density, and plasma age estimates for regions in SNR G53.41+0.03.
| Parameter | Units | Region 1 | Region 2 |
|---|---|---|---|
| Volume | (%) | 30 | 25 |
| Volume × f0.25 | (cm3) | 4.11 × 1057 | 3.42 × 1057 |
 |
(cm−3) | 0.87 | 0.34 |
| kTe | (keV) | 0.97 | 1.87 |
 |
(km s−1) | 900 | 1247 |
| Age estimates | |||
 |
(kyr) | 3.3 | 2.4 |
 |
(kyr) | 1.4 | 0.8 |
 |
(kyr) | 5.2 | 5.1 |
Notes. Parameters tv, tE, and 
represent plasma age estimates calculated using the Sedov shock velocity, Sedov radius, and ionisation age methods, respectively. d7.5 = (d∕7.5 kpc) is the distance of 7.5 kpc, β is the ratio between the post-shock electron and proton temperature (see Sect. 4.2.1), f0.25 = (f∕0.25) is the volume-filling factor normalised to 25%, and k0.3 = (k∕0.3) represents the correction for the difference between the measured bulk of the plasma ionisation age (τ) and the maximum possible τ0 present in the plasma (see Sect. 4.2.2).
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