241 citations · 2.6k across the 97 of their papers we have counts for
15 papers · 1 filter
A model for the enhanced production rate of early-type hypervelocity stars in the Galactic halo
Chunyang Cao, F. K. Liu, Xian Chen +1
About twenty late B-type hypervelocity stars (HVSs) traveling faster than the Galactic escape velocity have been discovered in the Galactic halo, many of which were ejected from th…
Stellar rotation of S301 as a macroscopic gyroscope to test general relativity
Pau Amaro Seoane, Xian Chen, Alejandro Torres-Orjuela +16
Stellar trajectories around the Galactic Center provide a testing environment for general relativity. The intrinsic rotation of these stars evolves under covariant transport in cur…
Gravitational Wave Astronomy With TianQin
En-Kun Li, Shuai Liu, Alejandro Torres-Orjuela +50
The opening of the gravitational wave window has significantly enhanced our capacity to explore the universe's most extreme and dynamic sector. In the mHz frequency range, a divers…
Revised event rates for extreme and extremely large mass-ratio inspirals
Verónica Vázquez-Aceves, Lorenz Zwick, Elisa Bortolas +4
One of the main targets of the Laser Interferometer Space Antenna (LISA) is the detection of extreme mass-ratio inspirals (EMRIs) and extremely large mass-ratio inspirals (X-MRIs).…
Merging stellar and intermediate-mass black holes in dense clusters: implications for LIGO, LISA and the next generation of gravitational wave detectors
Manuel Arca-Sedda, Pau Amaro-Seoane, Xian Chen
We study the formation of intermediate-mass ratio inspirals (IMRIs) triggered by the interactions between two stellar black holes (BHs) and an intermediate-mass BH (IMBH) inhabitin…
Impact of an Active Sgr A* on the Synthesis of Water and Organic Molecules Throughout the Milky Way
Chang Liu, Xian Chen, Fujun Du
Sgr A*, the supermassive black hole (SMBH) in our Galaxy, is dormant today, but it should have gone through multiple gas-accretion episodes in the past billions of years to grow to…
Direct n-body simulations of tidal disruption rate evolution in unequal-mass galaxy mergers
Shuo Li, Peter Berczik, Xian Chen +3
The hierarchical galaxy formation model predicts supermassive black hole binaries (SMBHBs) in galactic nuclei. Due to the gas poor environment and the limited spatial resolution in…
The TDE ASASSN-14li and its host resolved at parsec scales with the EVN
Cristina Romero-Cañizales, Jose L. Prieto, Xian Chen +5
We report European Very Long Baseline Interferometry Network (EVN) radio continuum observations of ASASSN-14li, one of the best studied tidal disruption events (TDEs) to date. At 1…
Stability of Gas Clouds in Galactic Nuclei: An Extended Virial Theorem
Xian Chen, Pau Amaro-Seoane, Jorge Cuadra
Cold gas entering the central to pc of a galaxy fragments and condenses into clouds. The stability of the clouds determines whether they will be turned into stars or can…
Sculpting the Stellar Cusp in the Galactic Center
Xian Chen, Pau Amaro-Seoane
Observations of the innermost parsec surrounding Sgr A ---the supermassive black hole in the center of our Galaxy--- have revealed a diversity of structures whose existence and…
A rapid evolving region in the Galactic Center: Why S-stars thermalize and more massive stars are missing
Xian Chen, Pau Amaro-Seoane
The existence of "S-stars" within a distance of 1" from SgrA contradicts our understanding of star formation, due to the forbiddingly violent environment. A suggested possibili…
Is there an intermediate massive black hole in the Galactic center: Imprints on the stellar tidal-disruption rate
Xian Chen, F. K. Liu
It has been suggested that an intermediate-massive black hole (IMBH) with mass could fall into the galactic center (GC) and form a massive black hole binary (MBH…
Interaction of Recoiling Supermassive Black Holes with Stars in Galactic Nuclei
Shuo Li, F. K. Liu, Peter Berczik +2
Supermassive black hole binaries (SMBHBs) are the products of frequent galaxy mergers. The coalescence of the SMBHBs is a distinct source of gravitational wave (GW) radiation. The…
Tidal stellar disruptions by massive black hole pairs: II. Decaying binaries
Xian Chen, Alberto Sesana, Piero Madau +1
Tidal stellar disruptions have traditionally been discussed as a probe of the single, massive black holes (MBHs) that are dormant in the nuclei of galaxies. In Chen et al. (2009),…
Enhanced tidal disruption rates from massive black hole binaries
X. Chen, P. Madau, A. Sesana +1
"Hard" massive black hole (MBH) binaries embedded in steep stellar cusps can shrink via three-body slingshot interactions. We show that this process will inevitably be accompanied…