Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Yan, Haopeng"'
Publikováno v:
Eur. Phys. J. C 84, 733 (2024)
We consider the light emitters moving freely along the geodesics on the equatorial plane near a Kerr black hole and study the observability of these emitters. To do so, we assume these emitters emit the photons isotropically and monochromatically, an
Externí odkaz:
http://arxiv.org/abs/2211.09344
Publikováno v:
Phys.Rev.D 106,064058 (2022)
In this present work, we study the observational appearance of Kerr-Melvin black hole (KMBH) illuminated by an accretion disk. The accretion disk is assumed to be located on the equatorial plane and be thin both geometrically and optically. Consideri
Externí odkaz:
http://arxiv.org/abs/2206.13744
In this work, we study the shadow of Kerr black hole surrounded by an axisymmetric plasma, whose density takes a Gaussian distribution in the polar direction. Along the radial direction, we consider two models: in model A the density of the plasma de
Externí odkaz:
http://arxiv.org/abs/2206.04430
In this work, we derive two formulas encoding the polarization direction and luminosity of synchrotron radiations from the moving electrons in curved spacetime under the geometric optics approximation. As an application, we further study the polarize
Externí odkaz:
http://arxiv.org/abs/2203.02908
We study the lensing effects of Kerr-Newman (KN) black holes and the multi-level images of luminous sources around the black holes. We obtain the analytic forms of the lens equations in KN spacetime and derive approximately their limiting forms for p
Externí odkaz:
http://arxiv.org/abs/2203.02755
We consider isotropic and monochromatic photon emissions from equatorial emitters moving along future-directed timelike geodesics in the near-horizon extremal Kerr (NHEK) and near-horizon near-extremal Kerr (near-NHEK) regions, to asymptotic infinity
Externí odkaz:
http://arxiv.org/abs/2108.09051
In this work, taking the QED effect into account, we investigate the shadows of the Kerr black holes immersed in uniform magnetic fields through the numerical backward ray-tracing method. We introduce a dimensionless parameter $\Lambda$ to characteri
Externí odkaz:
http://arxiv.org/abs/2108.06140
We revisit monochromatic and isotropic photon emissions from the zero-angular\linebreak-momentum sources (ZAMSs) near a Kerr black hole. We investigate the escape probability of the photons that can reach to infinity and study the energy shifts of th
Externí odkaz:
http://arxiv.org/abs/2104.07889
Publikováno v:
Phys. Rev. D 101, 024055 (2020)
We analytically study the optical appearance of an isotropically emitter orbiting near the horizon of a near-extremely rotating Kerr-Sen (KS) black hole which is an electrically charged black hole arising in heterotic string theory. We study the infl
Externí odkaz:
http://arxiv.org/abs/1911.04796
Autor:
Yan, Haopeng
Publikováno v:
Phys. Rev. D 99, 084050 (2019)
To approach a more reliable observational signature of a high-spin Kerr black hole, one should take into account the effects of its surroundings. To this end we study in this paper the influence of a surrounding plasma. We consider its refractive and
Externí odkaz:
http://arxiv.org/abs/1903.04382