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- W4385327900 abstract "Understanding the spectral evolution along the `Z'-shaped track in the hardness-intensity diagram of Z-sources, which are a class of luminous neutron star low-mass X-ray binaries, is crucial to probe accretion processes close to the neutron star. Here, we study the horizontal branch (HB) and the normal branch (NB) of the Z source GX 340+0 using $AstroSat$ data. We find that the HB and the NB appear as two different types of X-ray intensity dips, which can appear in any sequence and with various depths. Our $0.8-25$ ~keV spectra of dips and the hard apex can be modeled by the emissions from an accretion disk, a Comptonizing corona covering the inner disk, and the neutron star surface. We find, as the source moves onto the HB the corona is replenished and energized by the disk and a reduced amount of disk matter reaches the neutron star surface. We also conclude that quasi-periodic oscillations during HB/NB are strongly associated with the corona, and explain the evolution of strength and hard-lag of this timing feature using the estimated coronal optical depth evolution." @default.
- W4385327900 created "2023-07-28" @default.
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- W4385327900 date "2023-07-26" @default.
- W4385327900 modified "2023-10-14" @default.
- W4385327900 title "AstroSat view of the neutron star low-mass X-ray binary GX 340+0" @default.
- W4385327900 doi "https://doi.org/10.3847/1538-4357/acee7a" @default.
- W4385327900 hasPublicationYear "2023" @default.
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