A Be-type star with a black-hole companion

J. Casares (), I. Negueruela, M. Ribó, I. Ribas, J. M. Paredes, A. Herrero and S. Simón-Díaz
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J. Casares: Instituto de Astrofísica de Canarias, E-38205 La Laguna, Santa Cruz de Tenerife, Spain
I. Negueruela: Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain
M. Ribó: Departament d’Astronomia i Meteorologia, Institut de Ciències del Cosmos, Universitat de Barcelona, IEEC-UB, Martí i Franquès 1, E-08028 Barcelona, Spain
I. Ribas: Institut de Ciències de l’Espai—(IEEC-CSIC), Campus UAB, Facultat de Ciències, Torre C5 - parell - 2a planta, E-08193 Bellaterra, Spain
J. M. Paredes: Departament d’Astronomia i Meteorologia, Institut de Ciències del Cosmos, Universitat de Barcelona, IEEC-UB, Martí i Franquès 1, E-08028 Barcelona, Spain
A. Herrero: Instituto de Astrofísica de Canarias, E-38205 La Laguna, Santa Cruz de Tenerife, Spain
S. Simón-Díaz: Instituto de Astrofísica de Canarias, E-38205 La Laguna, Santa Cruz de Tenerife, Spain

Nature, 2014, vol. 505, issue 7483, 378-381

Abstract: A black hole with mass 3.8 to 6.9 times that of the Sun is found to be orbiting the nearby Be-type star MWC 656; the black hole is encircled by an accretion disk and X-ray quiescent, implying that Be binaries with black-hole companions are difficult to detect in conventional X-ray surveys.

Date: 2014
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DOI: 10.1038/nature12916

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