Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission
Black hole X-ray binary systems consist of a black hole accreting mass from its binary companion, forming an accretion disk. As a result, twin relativistic plasma ejections (jets) are launched towards opposite and perpendicular directions. Moreover, multiple broadband emission observations from X-ra...
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2024-10-01
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| author | Theodora Papavasileiou Odysseas Kosmas Theocharis Kosmas |
| author_facet | Theodora Papavasileiou Odysseas Kosmas Theocharis Kosmas |
| author_sort | Theodora Papavasileiou |
| collection | DOAJ |
| description | Black hole X-ray binary systems consist of a black hole accreting mass from its binary companion, forming an accretion disk. As a result, twin relativistic plasma ejections (jets) are launched towards opposite and perpendicular directions. Moreover, multiple broadband emission observations from X-ray binary systems range from radio to high-energy gamma rays. The emission mechanisms exhibit thermal origins from the disk, stellar companion, and non-thermal jet-related components (i.e., synchrotron emission, inverse comptonization of less energetic photons, etc.). In many attempts at fitting the emitted spectra, a static black hole is often assumed regarding the accretion disk modeling, ignoring the Kerr metric properties that significantly impact the geometry around the usually rotating black hole. In this work, we study the possible implications of the spin inclusion in predictions of the X-ray binary spectrum. We mainly focus on the most significant aspect inserted by the Kerr geometry, the innermost stable circular orbit radius dictating the disk’s inner boundary. The outcome suggests a higher-peaked and hardened X-ray spectrum from the accretion disk and a substantial increase in the inverse Compton component of disk-originated photons. Jet-photon absorption is also heavily affected at higher energy regimes dominated by hadron-induced emission mechanisms. Nevertheless, a complete investigation requires the full examination of the spin contribution and the resulting relativistic effects beyond the disk truncation. |
| format | Article |
| id | doaj-art-b1c7c2dcbac843d5b5cf55858e57ee3e |
| institution | Kabale University |
| issn | 2571-712X |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Particles |
| spelling | doaj-art-b1c7c2dcbac843d5b5cf55858e57ee3e2024-12-27T14:45:06ZengMDPI AGParticles2571-712X2024-10-017487988610.3390/particles7040052Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband EmissionTheodora Papavasileiou0Odysseas Kosmas1Theocharis Kosmas2Department of Informatics, University of Western Macedonia, GR-52100 Kastoria, GreeceDepartment of Physics, University of Ioannina, GR-45110 Ioannina, GreeceDepartment of Physics, University of Ioannina, GR-45110 Ioannina, GreeceBlack hole X-ray binary systems consist of a black hole accreting mass from its binary companion, forming an accretion disk. As a result, twin relativistic plasma ejections (jets) are launched towards opposite and perpendicular directions. Moreover, multiple broadband emission observations from X-ray binary systems range from radio to high-energy gamma rays. The emission mechanisms exhibit thermal origins from the disk, stellar companion, and non-thermal jet-related components (i.e., synchrotron emission, inverse comptonization of less energetic photons, etc.). In many attempts at fitting the emitted spectra, a static black hole is often assumed regarding the accretion disk modeling, ignoring the Kerr metric properties that significantly impact the geometry around the usually rotating black hole. In this work, we study the possible implications of the spin inclusion in predictions of the X-ray binary spectrum. We mainly focus on the most significant aspect inserted by the Kerr geometry, the innermost stable circular orbit radius dictating the disk’s inner boundary. The outcome suggests a higher-peaked and hardened X-ray spectrum from the accretion disk and a substantial increase in the inverse Compton component of disk-originated photons. Jet-photon absorption is also heavily affected at higher energy regimes dominated by hadron-induced emission mechanisms. Nevertheless, a complete investigation requires the full examination of the spin contribution and the resulting relativistic effects beyond the disk truncation.https://www.mdpi.com/2571-712X/7/4/52relativistic jetsaccretion diskXRBgamma raysblack holespin |
| spellingShingle | Theodora Papavasileiou Odysseas Kosmas Theocharis Kosmas Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission Particles relativistic jets accretion disk XRB gamma rays black hole spin |
| title | Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission |
| title_full | Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission |
| title_fullStr | Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission |
| title_full_unstemmed | Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission |
| title_short | Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission |
| title_sort | implications of the spin induced accretion disk truncation on the x ray binary broadband emission |
| topic | relativistic jets accretion disk XRB gamma rays black hole spin |
| url | https://www.mdpi.com/2571-712X/7/4/52 |
| work_keys_str_mv | AT theodorapapavasileiou implicationsofthespininducedaccretiondisktruncationonthexraybinarybroadbandemission AT odysseaskosmas implicationsofthespininducedaccretiondisktruncationonthexraybinarybroadbandemission AT theochariskosmas implicationsofthespininducedaccretiondisktruncationonthexraybinarybroadbandemission |