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8 papers · 2 filters
Enhancing Early Detection and Localization of Gravitational Waves via Eccentricity-Induced Higher Harmonic Modes with 2G Detector Networks
Tao Yang, Rong-Gen Cai, Zhoujian Cao +1
Early detection and localization of gravitational waves (GWs) are essential for identifying electromagnetic (EM) counterparts, playing a key role in multi-messenger astronomy. Howe…
Distinguishing black holes with and without spontaneous scalarization in Einstein-scalar-Gauss-Bonnet theories via optical features
Xi-Jing Wang, Yuan Meng, Xiao-Mei Kuang +1
Spontaneous scalarization in Einstein-scalar-Gauss-Bonnet theory admits both vacuum-general relativity (GR) and scalarized hairy black holes as valid solutions, which provides a di…
Inferring the spin distribution of binary black holes using deep learning
Li Tang, Xi-Long Fan
The spin characteristics of black holes offer valuable insights into the evolutionary pathways of their progenitor stars, crucial for understanding the broader population propertie…
Using the shadow of a black hole to examine the energy exchange between axion matter and a rotating black hole
Xiao-Mei Kuang, Yuan Meng, Eleftherios Papantonopoulos +1
We find that a \textit{slowly} rotating axion-modified black hole resulting from the backreaction of an axion field on a rotating Kerr black hole can have a \textit{D-shaped} shado…
Off-equatorial deflections and gravitational lensing. II. In general stationary and axisymmetric spacetimes
Xinguang Ying, Junji Jia
In this work, we develop a general perturbative procedure to find the off-equatorial plane deflections in the weak deflection limit in general stationary and axisymmetric spacetime…
Early dark energy triggered by spacetime dynamics that encodes cosmic radiation-matter transition
Changcheng Jing, Shuxun Tian, Zong-Hong Zhu
Early dark energy (EDE), introduced at the epoch of matter-radiation equality to alleviate the Hubble tension, has posed a new coincidence problem: why EDE appears at matter-radiat…