Sgr A* Shadow Study with KTN Space Time and Investigation of NUT Charge Existence
文献类型：期刊论文
| 作者 | Masoumeh, Ghasemi-Nodehi |
| 刊名 | UNIVERSE
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 10期号:9页码:378 |
| 关键词 | general relativity black hole shadow test of Kerr paradigm |
| DOI | 10.3390/universe10090378 |
| 产权排序 | 1 |
| 英文摘要 | In this paper, I investigate the existence of the NUT charge through the KTN spacetime using shadow observations of Sgr A*. I report that the range of my constraint for the NUT charge is between -0.5 and 0.5 for Schwarzschild-like and very slowly rotating KTN black holes. This range extends to 1.5 for spins up to -2 and -1.5 for spins up to 2 based on Keck observations for both 40 degrees and 10 degrees viewing angles. For VLTI observations, Schwarzschild-like and very slowly rotating KTN black holes are excluded for a 40 degrees viewing angle, and the NUT charge is constrained to a very narrow range for a 10 degrees viewing angle. I report that the possibility of having KTN naked singularities in Sgr A* is small, considering the uncertainties in the shadow size. |
| 资助项目 | CAS Talent Program ; CAS Telent Program ; Xinjiang Tianchi Telent Program |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001323818000001 |
| 出版者 | MDPI |
| 资助机构 | CAS Talent Program ; CAS Telent Program ; Xinjiang Tianchi Telent Program |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7015]  |
| 专题 | 星系宇宙学研究团组 |
| 通讯作者 | Masoumeh, Ghasemi-Nodehi |
| 作者单位 | Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Masoumeh, Ghasemi-Nodehi. Sgr A* Shadow Study with KTN Space Time and Investigation of NUT Charge Existence[J]. UNIVERSE,2024,10(9):378. |
| APA | Masoumeh, Ghasemi-Nodehi.(2024).Sgr A* Shadow Study with KTN Space Time and Investigation of NUT Charge Existence.UNIVERSE,10(9),378. |
| MLA | Masoumeh, Ghasemi-Nodehi."Sgr A* Shadow Study with KTN Space Time and Investigation of NUT Charge Existence".UNIVERSE 10.9(2024):378. |
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来源：新疆天文台
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