Signatures from the observed jet power and the radiative efficiency for rotating black holes in loop quantum gravity

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS The European Physical Journal C Pub Date : 2024-11-19 DOI:10.1140/epjc/s10052-024-13555-2

Zhengwei Cheng, Songbai Chen, Jiliang Jing

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Abstract

We investigate the radiative efficiency and jet power in the spacetime of a rotating black hole within the framework of loop quantum gravity (LQG), which includes an additional LQG parameter. The results show that as the LQG parameter increases, the radiative efficiency decreases for slowly rotating black holes while it increases for rapidly rotating black holes. Furthermore, the jet power is found to increase for different black hole spins. With the observed data from the well-known sources A0620-00, H1743-322, XTE J1550-564, GRS1124-683, GRO J1655-40, and GRS1915+105, we make some constraints on the black hole spin parameter and the LQG parameter. The presence of the LQG parameter broadens the allowed range of the black hole spin parameter for sources A0620-00, H1743-322, XTE J1550-564 and GRO J1655-40. However, for the source GRS 1915+105, there is no overlap between the allowed parameter regions, which implies that the rotating LQG black hole cannot simultaneously account for the observed jet power and the radiative efficiency as in other black hole spacetimes

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环量子引力中旋转黑洞的观测喷流功率和辐射效率特征

我们在环量子引力（LQG）框架内研究了旋转黑洞时空中的辐射效率和喷流功率。结果表明，随着 LQG 参数的增加，慢速旋转黑洞的辐射效率会降低，而快速旋转黑洞的辐射效率会增加。此外，还发现不同自旋黑洞的喷流功率也会增加。我们利用来自著名天体A0620-00、H1743-322、XTE J1550-564、GRS1124-683、GRO J1655-40和GRS1915+105的观测数据，对黑洞自旋参数和LQG参数做了一些约束。LQG参数的存在扩大了A0620-00、H1743-322、XTE J1550-564和GRO J1655-40等源的黑洞自旋参数的允许范围。这意味着旋转 LQG 黑洞无法同时解释观测到的喷流功率和辐射效率，就像在其他黑洞空间一样。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.