Thermal spectra of thin accretion discs of finite thickness around Kerr black holes
| العنوان: | Thermal spectra of thin accretion discs of finite thickness around Kerr black holes |
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| المؤلفون: | Cosimo Bambi, Askar B. Abdikamalov, Menglei Zhou, Victoria Grinberg, Dimitry Ayzenberg, Ashutosh Tripathi |
| المصدر: | Monthly Notices of the Royal Astronomical Society. 496:497-503 |
| بيانات النشر: | Oxford University Press (OUP), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Spins, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, Accretion (astrophysics), Computational physics, Black hole, Rotating black hole, Thin disk, Space and Planetary Science, Thermal radiation, Black-body radiation, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Finite thickness, Astrophysics::Galaxy Astrophysics |
| الوصف: | The analysis of the thermal spectrum of geometrically thin and optically thick accretion disks of black holes, the so-called continuum-fitting method, is one of the leading techniques for measuring black hole spins. Current models normally approximate the disk as infinitesimally thin, while in reality the disk thickness is finite and increases as the black hole mass accretion rate increases. Here we present an XSPEC model to calculate the multi-temperature blackbody spectrum of a thin accretion disk of finite thickness around a Kerr black hole. We test our new model with an RXTE observation of the black hole binary GRS 1915+105. We find that the spin value inferred with the new model is slightly higher than the spin value obtained with a model with an infinitesimally thin disk, but the difference is small and the effect is currently subdominant with respect to other sources of uncertainties in the final spin measurement. 8 pages, 3 figures. v2: refereed version |
| تدمد: | 1365-2966 0035-8711 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e60b12787e31d8e608ec2188f591fc61 https://doi.org/10.1093/mnras/staa1591 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....e60b12787e31d8e608ec2188f591fc61 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 00358711 |
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