G. Banyard

TL;DR: In this article, the authors performed an orbital analysis and spectral disentangling of LS V +22 25 (LB-1) to elucidate the nature of the system, which revealed that LB-1 contains two components of comparable brightness in the optical.

TL;DR: It is shown that the apparent shifts of the Hα emission line used to derive the mass of the black hole arise from the orbital motion of the B-type companion star in the LB-1 binary system and not from that of theblack hole, removing the existing tension between its proposed existence and models of the formation of such a massive black hole at galactic metallicity.

TL;DR: In this article, Liu et al. showed that the observational diagnostics used to derive the BH mass results from the orbital motion of the B-type star, not that of BH, therefore solving the existing tension with formation models of such a massive BH at solar metallicity and with theories of massive star evolution.

TL;DR: In this article, the authors performed an orbital analysis and spectral disentangling of LS V +22 25 (LB-1) to elucidate the nature of the system, which revealed that LB-1 contains two components of comparable brightness in the optical.

TL;DR: In this paper, the authors investigated the properties of HR 6819 to search for a possibly simpler alternative explanation for HR6819, which does not invoke the presence of a triple system with a BH in the inner binary.