A comment on the colour-colour diagrams of Low Mass X-ray Binaries

@inproceedings{Gierlinski2008ACO,
  title={A comment on the colour-colour diagrams of Low Mass X-ray Binaries},
  author={Marek Gierlinski and Chris Done},
  year={2008}
}
Disc accreting neutron stars come in two distinct varieties, atolls and Z sources, named after their differently shaped tracks on a colour-colour diagram as the source luminosity changes. Here we show that the atoll systems are poorly named. On a colour-colour diagram they do not trace out an atoll (or C) shaped path. They trace out a Z. Thus they evolve with increasing mass accretion rate in very similar ways to the Z sources! This strongly favours models in which the underlying geometry of… CONTINUE READING