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Fig. 5


Mean luminosity of HMXBs above a threshold of 1038 erg s-1, as a function of the oxygen abundance. Black, filled squares are the data points, while the red dashed line is the best linear fit to them, . A low-significance anticorrelation between these variables is observed, which might suggest a brightening of HMXBs at low metallicities. As in previous figures, the dispersion around the fit is large (0.4 dex).

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