Report
AstroSat view of the neutron star low-mass X-ray binary GX 340+0
| العنوان: | AstroSat view of the neutron star low-mass X-ray binary GX 340+0 |
|---|---|
| المؤلفون: | Bhargava, Yash, Bhattacharyya, Sudip, Homan, Jeroen, Pahari, Mayukh |
| المصدر: | The Astrophysical Journal, October 2023, Volume 955, Issue 2, id.102, 8 pp |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | 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. Comment: Updating to the published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/acee7a |
| URL الوصول: | http://arxiv.org/abs/2307.13979 |
| رقم الانضمام: | edsarx.2307.13979 |
| قاعدة البيانات: | arXiv |
كن أول من يترك تعليقا!