56 citations · 363 across the 34 of their papers we have counts for
35 papers
Electromagnetic alignment and jet precession around supermassive black holes: Quasi-periodic oscillations in tidal disruption events
Pau Amaro-Seoane, Leif Lui, Alejandro Torres-Orjuela +1
We evaluate quasi-periodic oscillations and jet formation in tidal disruption events using the covariant formulation of electromagnetic angular-momentum transfer. General-relativis…
Devoured by a Hairy Gargantua: Probing Massive Scalar Charges with Non-minimal Curvature Coupling with Extreme-Mass-Ratio Inspirals
Leif Lui, Adrian Ka-Wai Chung, Alejandro Torres-Orjuela
Ultralight scalar fields nonminimally coupled to curvature can endow rotating black holes with stationary hair and alter nearby orbits. Using recently constructed hairy black-hole…
A Dark Matter Masquerade: Degeneracies in Black Hole and Accretion Inference from X-ray Reflection Measurements and Prospects for Compact Dark Matter Halo Constraints
Leif Lui, Zijian Zhang, Alejandro Torres-Orjuela
X-ray reflection spectroscopy is an established probe of black hole (BH) spin and accretion geometry, and many studies have examined its systematic uncertainties. In this work, we…
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…
Hubble constant measurement with 13 bright standard sirens from binary black hole mergers inside active galactic nuclei
Dhruv Kumar, Alejandro Torres-Orjuela
We measure the Hubble constant using 13 gravitational-wave binary black hole mergers associated with active galactic nucleus hosts. We find $H_0=70.50^{+3.37}_{-2.89}\,({\rm…
A population of LIGO-Virgo-KAGRA mergers happening inside active galactic nuclei
Dhruv Kumar, Alejandro Torres-Orjuela
Multimessenger observations of compact binary mergers in active galactic nuclei (AGN) offer unique probes of black hole formation channels and cosmology. We analyse 18 gravitationa…
Pitching Cosmic Curveballs: Environmental Effects on Extreme-Mass-Ratio Inspirals with Spinning Secondaries
Leif Lui, Lisa V. Drummond, Alejandro Torres-Orjuela
Much like the aerodynamic deflection of a spinning curveball, a rotating secondary in an extreme-mass-ratio inspiral (EMRI) experiences Magnus and lift forces, in addition to the s…
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…
Constructing a gravitational wave analysis pipeline for extremely large mass ratio inspirals
Tian-Xiao Wang, Yan Wang, Alejandro Torres-Orjuela +4
Extremely large mass-ratio inspirals (XMRIs), consisting of a brown dwarf orbiting a supermassive black hole, emit long-lived and nearly monochromatic gravitational waves in the mi…
Constraining modified theories of gravity through the detection of one extremely large mass-ratio inspiral
Hui-Min Fan, Alejandro Torres-Orjuela, Verónica Vázquez-Aceves +2
Extremely large mass-ratio inspirals (XMRIs), formed by brown dwarfs inspiraling into a massive black hole, emit gravitational waves (GWs) that fall within the detection band of fu…
Gravitational Wave Signatures of Quasi-Periodic Eruptions: LISA Detection Prospects for RX J1301.9+2747
Leif Lui, Alejandro Torres-Orjuela, Rudrani Kar Chowdhury +1
Quasiperiodic eruptions (QPEs) are intense, recurring outbursts of X-ray radiation originating from the nuclei of distant galaxies. One of the promising models of QPE explains thes…
The I-Love universal relation for polytropic stars under Newtonian gravity
Rui Xu, Alejandro Torres-Orjuela, Lars Andersson +1
The moment of inertia and tidal deformability of idealized stars with polytropic equations of state (EOSs) are numerically calculated under both Newtonian gravity and general relat…
Detection of Intermediate-Mass Ratio Inspirals in Globular Clusters: Revealing the Brownian Motion with Gravitational Waves
Alejandro Torres-Orjuela, Verónica Vázquez-Aceves, Tian-Xiao Wang
Intermediate-mass ratio inspirals (IMRIs) formed by stellar-mass compact objects orbiting intermediate-mass black holes will be detected by future gravitational wave (GW) observato…
Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the Second Workshop
Adam Abdalla, Mahiro Abe, Sven Abend +307
This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024, build…
SgrA* spin and mass estimates through the detection of multiple extremely large mass-ratio inspirals
Verónica Vázquez-Aceves, Yiren Lin, Alejandro Torres-Orjuela
We analyze the parameter estimation accuracy that can be achieved for the mass and spin of SgrA, the SMBH in our Galactic Center, by detecting multiple extremely large mass-…
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…
Joint gravitational wave detection by TianQin and LISA
Alejandro Torres-Orjuela
We study the detection accuracy of double white dwarfs (DWDs), stellar-mass black hole binaries (SBHBs), light and heavy intermediate mass ratio inspirals (IMRIs), extreme mass rat…
GWnext 2024: Meeting Summary
Alejandro Torres-Orjuela, Veronica Vazquez-Aceves, Rui Xu +19
GWnext 2024 was a meeting held in the Kavli Institute for Astronomy and Astrophysics at Peking University in March , 2024. In the meeting researchers at…
Black hole spectroscopy with ground-based atom interferometer and space-based laser interferometer gravitational wave detectors
Alejandro Torres-Orjuela
Gravitational wave (GW) detection has enabled us to test General Relativity in an entirely new regime. A prominent role in tests of General Relativity takes the detection of the Qu…
LISA Definition Study Report
Monica Colpi, Karsten Danzmann, Martin Hewitson +108
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves…
Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary
Sven Abend, Baptiste Allard, Iván Alonso +250
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world…
GW190521: a binary black hole merger inside an active galactic nucleus?
Sophia Morton, Stefano Rinaldi, Alejandro Torres-Orjuela +3
GW190521, the most massive binary black hole merger confidently detected by the LIGO-Virgo-KAGRA collaboration, is the first gravitational-wave observation of an intermediate-mass…
Identification of Gravitational-waves from Extreme Mass Ratio Inspirals
Chang-Qing Ye, Hui-Min Fan, Alejandro Torres-Orjuela +2
Space-based gravitational wave detectors like TianQin or LISA could observe extreme-mass-ratio-inspirals (EMRIs) at millihertz frequencies. The accurate identification of these EMR…
Detection of astrophysical gravitational wave sources by TianQin and LISA
Alejandro Torres-Orjuela, Shun-Jia Huang, Zheng-Cheng Liang +5
TianQin and LISA are space-based laser interferometer gravitational wave (GW) detectors planned to be launched in the mid-2030s. Both detectors will detect low-frequency GWs around…