|
|
|
|
|
|
by stoicking
2237 days ago
|
|
|
Yes, that's what the article says. The research paper says: "Several dozen optical echelle spectra demonstrate that HR 6819 is a hierarchical triple. A classical Be star is in a wide orbit with an unconstrained period around an inner 40 d binary consisting of a B3 III star and an unseen companion in a circular orbit. The radial-velocity semi-amplitude of 61.3 km/s of the inner star and its minimum (probable) mass of 5.0 M (6.3 ± 0.7 M ) imply a mass of the unseen object of ≥ 4.2 M (≥ 5.0 ± 0.4 M ), that is, a black hole (BH)." |
|
|