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Fig. 14

image

Al iii resonance lines λ1855 and λ1863Å, employed for the estimation in Vela X-1. We show the observation (solid blue line), best-fit model ( = 10-6.2M/yr, D = 11, red dashed line), a model with higher ( = 10-5.8M/yr, D = 2, green dashed line), and a model with lower ( = 10-6.3M/yr, D = 20, pink dashed line).

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