18 papers
Stellar rotation of S301 as a macroscopic gyroscope to test general relativity
Pau Amaro Seoane, Xian Chen, Alejandro Torres-Orjuela +16
The paper studies how the rotation of the S301 star near the Galactic Center can act as a macroscopic gyroscope, using its relativistic precession to test general relativity with i…
Extreme Mass Ratio Inspirals in Light of Quasi-periodic Eruptions: Milli-Hertz Gravitational Wave Background
Brennen Black, Xian Chen, Zhen Pan
Quasi-periodic eruptions (QPEs) are repeated X-ray bursts originating in galactic nuclei. Of the many proposed models, the favored model is the disk-collision model in which a stel…
Relativistic Tidal Dissipation and the Gravitational-wave Signal of a White Dwarf Orbiting an Intermediate-Mass Black Hole
Yang Yang, Leif Lui, Alejandro Torres-Orjuela +1
Finding intermediate-mass black holes (IMBHs) and measuring their masses and spins are key to understanding massive black hole formation. White dwarf (WD)-IMBH binaries provide a u…
A Whisper from Within: Response of a Pulsar Timing Array to an Internal Gravitational-wave Source
Houyuan Qi, Xian Chen, Lin Wang +1
Millisecond pulsars (MSPs) are abundant in globular clusters (GCs) and probably also in galactic nuclei. They offer the potential to form a miniature pulsar timing array (mini-PTA)…
Gravitational radiation from Kerr black holes using the Sasaki-Nakamura formalism: Waveforms and fluxes at infinity
Yucheng Yin, Rico K. L. Lo, Xian Chen
In linear perturbation theory for Kerr black holes, there are two equivalent formalisms, namely the Teukolsky and the Sasaki-Nakamura (SN) formalism. Typically, one defaults to the…
Thick Lunar Crust Amplifies Deci-Hertz Gravitational-Wave Signal
Lei Zhang, Han Yan, Xian Chen +1
Gravitational waves (GWs) in the Hz band encode unique signatures of the early universe and merging compact objects, but they are beyond the reach of existing observato…