Report
Shadows of Kerr-Vaidya-like black holes
| العنوان: | Shadows of Kerr-Vaidya-like black holes |
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| المؤلفون: | Tan, H. S. |
| المصدر: | Class. Quantum Grav. 40 195010, 2023 |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Theory |
| الوصف: | In this work, we study the shadow boundary curves of rotating time-dependent black hole solutions which have well-defined Kerr and Vaidya limits. These solutions are constructed by applying the Newman-Janis algorithm to a spherically symmetric seed metric conformal to the Vaidya solution with a mass function that is linear in Eddington-Finkelstein coordinates. Equipped with a conformal Killing vector field, this class of solution exhibits separability of null geodesics, thus allowing one to develop an analytic formula for the boundary curve of its shadow. We find a simple power law describing the dependence of the mean radius and asymmetry factor of the shadow on the accretion rate. Applicability of our model to recent Event Horizon Telescope observations of M87${}^*$ and Sgr A${}^*$ is also discussed. Comment: 28 pages, 9 figures. [v4]: minor edits |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1361-6382/acf180 |
| URL الوصول: | http://arxiv.org/abs/2301.04967 |
| رقم الانضمام: | edsarx.2301.04967 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1361-6382/acf180 |
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