2023
DOI: 10.1093/mnras/stad2094
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Accreting black holes skewing and bending the optical emission from massive Wolf–Rayet companions – a case study of IC10 X-1

Abstract: We present a statistical analysis of the He ii 4686 emission line in the spectra of the black hole and Wolf-Rayet (WR) star of the high-mass X-ray binary IC10 X-1. This line is visibly skewed, and the third moment (skewness) varies with the binary’s orbital phase. We describe a new method of extracting such weak/faint features lying barely above a noisy continuum. Using the moments of these features, we have been able to decompose these skewed lines into two symmetric Gaussian profiles as a function of the orb… Show more

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