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Correlated spectro-polarimetric study along the Z track in XTE J1701-462 puts constraints on its coronal geometry by Yu, Wei; Bu, Qingcui; Doroshenko, Victor; Ducci, Lorenzo; Ji, Long; Zhang, Wenda; Santangelo, Andrea; Zhang, Shuangnan; Waghmare, Anand; Ge, Mingyu; Huang, Yue; Liu, Hexin; Tao, Lian; Yang, Zixu; Zhang, Liang; Qu, Jinlu is a scholarly article available to read on EtoBox.

What is Correlated spectro-polarimetric study along the Z track in XTE J1701-462 puts constraints on its coronal geometry about?

Context. In September 2022, the transient neutron star low-mass X-ray binary XTE J1701-462 went into a new outburst. Aims. The objective of this work is to examine the evolution of the accretion geometry of XTE J1701-462 by studying the spectro-polarimetric properties along the Z track of this source. The simultaneous observations archived by the Insight-Hard X-ray Modulation Telescope (HXMT) and the Imaging X-ray Polarimetry Explorer (IXPE) give us the opportunity. Methods. We present a comprehensive X-ray spectro-polarimetric analysis of XTE J1701-462, using simultaneous observations from IXPE, Insight-HXMT and NuSTAR. For IXPE observations, two methods are employed to measure the polarization: a model-independent measurement with PCUBE and a model-dependent polarization-spectral analysis with XSPEC. The corresponding spectra from Insight-HXMT and NuSTAR are studied with two configurations that correspond to a slab-like corona and a spherical shell-like corona, respectively. Results. Significant polarization characteristics are detected in XTE J1701-462. The polarization degree shows a decreasing trend along the Z track, reducing from (4.84 $\pm$ 0.37)% to (3.76 $\pm$ 0.43)% on t

Author

Yu, Wei; Bu, Qingcui; Doroshenko, Victor; Ducci, Lorenzo; Ji, Long; Zhang, Wenda; Santangelo, Andrea; Zhang, Shuangnan; Waghmare, Anand; Ge, Mingyu; Huang, Yue; Liu, Hexin; Tao, Lian; Yang, Zixu; Zhang, Liang; Qu, Jinlu

Published

2024

Language

EN