Saved in:
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.06883 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912950764175360 |
|---|---|
| author | Liu, Honghui Kong, Lingda Adegoke, Oluwashina K. Jiang, Jiachen Bambi, Cosimo Fabian, Andrew C. Ingram, Adam Ravi, Swati Steiner, James F. Shui, Qingcang Walton, Dominic J. Xu, Yerong Young, Andrew J. Zhang, Yuexin Zhang, Zuobin Santangelo, Andrea |
| author_facet | Liu, Honghui Kong, Lingda Adegoke, Oluwashina K. Jiang, Jiachen Bambi, Cosimo Fabian, Andrew C. Ingram, Adam Ravi, Swati Steiner, James F. Shui, Qingcang Walton, Dominic J. Xu, Yerong Young, Andrew J. Zhang, Yuexin Zhang, Zuobin Santangelo, Andrea |
| contents | We present a spectroscopic analysis of XRISM and NuSTAR observations of the black hole X-ray binary GS~1354--64 during its 2026 outburst. A total number of 3.5 million photons are collected by the microcalorimeter Resolve on board XRISM, providing an unprecedented high-resolution view of the iron line profile. A clean broad iron line is found in the data, without significant narrow features. Modeling the broad iron line with relativistic reflection from the inner accretion disk suggests a rapidly spinning black hole (a>0.98) in the system. Measurements of the disk inclination angle from the reflection method are model-dependent. This work demonstrates the power of X-ray microcalorimeters in studying the inner accretion flow and constraining black hole parameters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_06883 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A clean broad iron line in GS 1354--64 as seen by XRISM Liu, Honghui Kong, Lingda Adegoke, Oluwashina K. Jiang, Jiachen Bambi, Cosimo Fabian, Andrew C. Ingram, Adam Ravi, Swati Steiner, James F. Shui, Qingcang Walton, Dominic J. Xu, Yerong Young, Andrew J. Zhang, Yuexin Zhang, Zuobin Santangelo, Andrea High Energy Astrophysical Phenomena We present a spectroscopic analysis of XRISM and NuSTAR observations of the black hole X-ray binary GS~1354--64 during its 2026 outburst. A total number of 3.5 million photons are collected by the microcalorimeter Resolve on board XRISM, providing an unprecedented high-resolution view of the iron line profile. A clean broad iron line is found in the data, without significant narrow features. Modeling the broad iron line with relativistic reflection from the inner accretion disk suggests a rapidly spinning black hole (a>0.98) in the system. Measurements of the disk inclination angle from the reflection method are model-dependent. This work demonstrates the power of X-ray microcalorimeters in studying the inner accretion flow and constraining black hole parameters. |
| title | A clean broad iron line in GS 1354--64 as seen by XRISM |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.06883 |