Bibcode
DOI
Casares, J.; Charles, P. A.; Naylor, T.
Referencia bibliográfica
Nature (ISSN 0028-0836), vol. 355, Feb. 13, 1992, p. 614-617.
Fecha de publicación:
2
1992
Número de citas
247
Número de citas referidas
217
Descripción
Two years after its outburst in 1989, the William Herschel Telescope has
been used to find absorption features in V404 Cyg characteristic of a
late G or early K star with a radial velocity curve of amplitude 211 +/-
4 km/s and period 6.473 +/- 0.001 days. The deduced mass function of
6.26 +/- 0.31 solar masses is a firm lower limit to the mass of the
compact object, which for reasonable assumptions of orbital inclination
and companion star mass must be a black hole with probable mass in the
range 8-15.5 solar masses.