Towards a dynamical mass of the ultraluminous X-ray source NGC 5408 X-1
We obtained multi-epoch Very Large Telescope optical spectroscopic data in 2011 and 2012 on the ultraluminous X-ray source NGC 5408 X-1. We confirm that the He II λ4686 line has a broad component with an average full width at half-maximum of v = 780 ± 64 km s-1 with a variation of ˜13 per cent during observations spanning over four years, and is
Grisé, F. et al.
Fecha de publicación:
11
2013