Method for Determining the Parameters of a Ring-like Structure from the Visibility Function Shape
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917913762463744 |
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| author | Chernov, S. V. Shchurov, M. A. Bulygin, I. I. Rudnitskiy, A. G. |
| author_facet | Chernov, S. V. Shchurov, M. A. Bulygin, I. I. Rudnitskiy, A. G. |
| contents | Black hole images obtained by very long baseline interferometry (VLBI) by the Event Horizon Telescope are a new tool for testing general relativity in super-strong gravitational fields. These images demonstrated a ring-like structure which can be explained as the black hole shadow image. To date, there are no reliable methods for determining the parameters of these ring-like structures, such as diameter, width, and asymmetry. In this paper, an algorithm for determining black hole image parameters is proposed using a Gaussian asymmetric ring as an example. Using the proposed method, the diameter and asymmetry parameters of the image of a supermassive black hole in the galaxy M87$^{*}$ were estimated based on observational data obtained by the Event Horizon Telescope group. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_03026 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Method for Determining the Parameters of a Ring-like Structure from the Visibility Function Shape Chernov, S. V. Shchurov, M. A. Bulygin, I. I. Rudnitskiy, A. G. Instrumentation and Methods for Astrophysics Black hole images obtained by very long baseline interferometry (VLBI) by the Event Horizon Telescope are a new tool for testing general relativity in super-strong gravitational fields. These images demonstrated a ring-like structure which can be explained as the black hole shadow image. To date, there are no reliable methods for determining the parameters of these ring-like structures, such as diameter, width, and asymmetry. In this paper, an algorithm for determining black hole image parameters is proposed using a Gaussian asymmetric ring as an example. Using the proposed method, the diameter and asymmetry parameters of the image of a supermassive black hole in the galaxy M87$^{*}$ were estimated based on observational data obtained by the Event Horizon Telescope group. |
| title | Method for Determining the Parameters of a Ring-like Structure from the Visibility Function Shape |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2502.03026 |