000005384 001__ 5384
000005384 005__ 20210716114057.0
000005384 0247_ $$2DOI$$a10.1038/s41586-020-2216-x
000005384 037__ $$aSCART-2021-0105
000005384 100__ $$aAbdul-Masih, M.
000005384 245__ $$aOn the signature of a 70-solar-mass black hole in LB-1
000005384 260__ $$c2020
000005384 520__ $$aLiu et al. (2019) recently reported the detection of a 68 [+11/-13] solar mass (Msun) black hole (BH) paired with an 8.2 [+0.9/-1.2] Msun B-type sub-giant star in the 78.9-day spectroscopic binary system LB-1. Such a black hole is over twice as massive as any other known stellar-mass black hole with non-compact companions2 and its mass approaches those that result from BH-BH coalescences that are detected by gravitational wave interferometers. Its presence in a solar-like metallicity environment challenges conventional theories of massive binary evolution, stellar winds and core-collapse supernovae, so that more exotic scenarios seem to be needed to explain the existence and properties of LB-1. Here, we show that the observational diagnostics used to derive the BH mass results from the orbital motion of the B-type star, not that of the BH. As a consequence, no evidence for a massive BH remains in the data, therefore solving the existing tension with formation models of such a massive BH at solar metallicity and with theories of massive star evolution in general.
000005384 594__ $$aNO
000005384 700__ $$aBanyard, G.
000005384 700__ $$aBodensteiner, J.
000005384 700__ $$aBordier, E.
000005384 700__ $$aBowman, D. M.  
000005384 700__ $$aDsilva, K.  
000005384 700__ $$aFabry, M. 
000005384 700__ $$aHawcroft, C.
000005384 700__ $$aMahy, L.
000005384 700__ $$aMarchant, P.
000005384 700__ $$aRaskin, G.
000005384 700__ $$aReggiani, M.
000005384 700__ $$aShenar, T.
000005384 700__ $$aTkachenko, A.
000005384 700__ $$aVan Winckel, H.
000005384 700__ $$aVermeylen, L.
000005384 700__ $$aSana, H.
000005384 773__ $$cp.E11-E15$$n7805$$pNature$$v580$$y2020
000005384 8560_ $$flaurent.mahy@ksb-orb.be
000005384 905__ $$apublished in
000005384 980__ $$aREFERD