742 citations · 1.2k across the 14 of their papers we have counts for
14 papers
Critical behavior of AdS black holes surrounded by dark fluid with Chaplygin-like equation of state
Xiang-Qian Li, Hao-Peng Yan, Li-Li Xing +1
Supposing the existence of Dark Fluid with a Chaplygin-like equation of state (CDF) as a cosmic background, we obtain a static spherically-symmetric black hole (BH) soluti…
Photon emissions from Kerr equatorial geodesic orbits
Yanming Su, Minyong Guo, Haopeng Yan +1
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 t…
Image of Kerr-Melvin black hole with thin accretion disk
Yehui Hou, Zhenyu Zhang, Haopeng Yan +2
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 eq…
Shadows of Kerr black holes with a Gaussian-distributed plasma in the polar direction
Zhenyu Zhang, Haopeng Yan, Minyong Guo +1
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 dire…
Polarized Images of Synchrotron Radiations in Curved Spacetime
Zezhou Hu, Yehui Hou, Haopeng Yan +2
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…
Multi-level images around Kerr-Newman black holes
Yehui Hou, Peng Liu, Minyong Guo +2
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 equatio…
Photon emissions from near-horizon extremal and near-extremal Kerr equatorial emitters
Haopeng Yan, Zezhou Hu, Minyong Guo +1
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-…
QED Effects on Kerr Black Hole Shadows immersed in uniform magnetic fields
Zhen Zhong, Zezhou Hu, Haopeng Yan +2
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…
Observability of Zero-angular-momentum Sources Near Kerr Black Holes
Haopeng Yan, Minyong Guo, Bin Chen
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 th…
Observational signature of a near-extremal Kerr-Sen black hole in the heterotic string theory
Minyong Guo, Shupeng Song, Haopeng Yan
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 ch…
Influence of a plasma on the observational signature of a high-spin Kerr black hole
Haopeng Yan
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…
Observational signature of near-extremal Kerr-like black holes in a modified gravity theory at the Event Horizon Telescope
Minyong Guo, Niels A. Obers, Haopeng Yan
We study the shadows cast by near-extremal Kerr-MOG black holes for different values of the parameter in modified gravity (MOG). In particular, we consider an isotropic emitter orb…
Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…
Warping of accretion disk and launching of jet by a spinning black hole in NGC 4258
Qingwen Wu, Hao Yan, Zhu Yi
We fit the most updated broadband spectral energy distribution from radio to X-rays for NGC 4258 with a coupled accretion-jet model that surrounding a Kerr black hole (BH), where b…