The spectral properties of the low-mass X-ray binary 4U 1608-52

The spectral properties of the neutron-star low-mass X-ray binary 4U 1608-52 under different spectral states were studied based on observation data from Suzaku satellite. This article applied the latest reflection model to indicate the presence of significant reflection components in these observations, which is inconsistent with previous work that did not find obvious reflection features. In addition, the results show that the evolution trend of the physical parameters of the accretion system between different spectral states is the same as the one predicted by classical theory. When the accretion disk provides seed photons to the corona, over 50% of the accretion disk photons will enter the corona and be scattered in the hard spectral state, while only about 5% of the accretion disk photons will enter the corona in the soft state. The study suggests that the corona should be located in a region closer to the central neutron star, supporting the current popular coronal lamp post geometry, physical images of jet bottoms, and neutron star boundary layer models.