Article (Scientific journals)
No signature of the orbital motion of a putative 70 solar mass black hole in LB-1
Abdul-Masih, Michael; Banyard, Gareth; Bodensteiner, Julia et al.
2020In Nature Astronomy, p. 1912.04092
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Keywords :
Astrophysics - Solar and Stellar Astrophysics
Abstract :
[en] Abstract: Liu et al.1 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 companions 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Abdul-Masih, Michael
Banyard, Gareth
Bodensteiner, Julia
Bowman, Dominic M.
Dsilva, Karan
Fabry, Matthias
Hawcroft, Calum
Mahy, Laurent ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Marchant, Pablo
Raskin, Gert
Reggiani, Maddalena
Sana, Hugues
Shenar, Tomer
Tkachenko, Andrew
Van Winckel, Hans
Vermeylen, Lore
More authors (6 more) Less
Language :
English
Title :
No signature of the orbital motion of a putative 70 solar mass black hole in LB-1
Publication date :
2020
Journal title :
Nature Astronomy
eISSN :
2397-3366
Publisher :
Springer Nature
Pages :
arXiv:1912.04092
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Submitted to Nature in response to their paper Liu et al. 2019
Available on ORBi :
since 20 January 2020

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