Výsledky vyhledávání - "Horng Sheng Chia"

Self-Interacting Gravitational Atoms in the Strong-Gravity Regime

Autor: Horng Sheng Chia, Christoffel Doorman, Alexandra Wernersson, Tanja Hinderer, Samaya Nissanke

We numerically investigate free and self-interacting ultralight scalar fields around black holes in General Relativity. We focus on complex scalar fields $\Phi$ whose self-interactions are described by the quartic potential $V \propto \lambda |\Phi|^

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Distribution of Effective Spins and Masses of Binary Black Holes from the LIGO and Virgo O1-O3a Observing Runs

Autor: Matias Zaldarriaga, Tejaswi Venumadhav, Horng Sheng Chia, Javier Roulet, Liang Dai, Barak Zackay, Seth Olsen

The distribution of effective spin $\chi_{\rm eff}$, a parameter that encodes the degree of spin-orbit alignment in a binary system, has been widely regarded as a robust discriminator between the isolated and dynamical formation pathways for merging

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Mapping the Likelihood of GW190521 with Diverse Mass and Spin Priors

Autor: Seth Olsen, Matias Zaldarriaga, Horng Sheng Chia, Javier Roulet, Tejaswi Venumadhav, Liang Dai, Barak Zackay

We map the likelihood of GW190521, the heaviest detected binary black hole (BBH) merger, by sampling under different mass and spin priors designed to be uninformative. We find that a source-frame total mass of $\sim$$150 M_{\odot}$ is consistently su

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Signs of Higher Multipoles and Orbital Precession in GW151226

Autor: Horng Sheng Chia, Seth Olsen, Javier Roulet, Liang Dai, Tejaswi Venumadhav, Barak Zackay, Matias Zaldarriaga

We present a reanalysis of GW151226, the second binary black hole merger discovered by the LIGO--Virgo Collaboration. Previous analysis showed that the best-fit waveform for this event corresponded to the merger of a $\sim 14 \, M_\odot$ black hole w

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Gravitational Collider Physics

Autor: Daniel Baumann, Horng Sheng Chia, Rafael A. Porto, John Stout

Publikováno v: Physical Review D
Physical review / D 101(8), 083019 (2020). doi:10.1103/PhysRevD.101.083019
Physical Review D, 101(8):083019. American Institute of Physics

Physical review / D 101(8), 083019 (2020). doi:10.1103/PhysRevD.101.083019
We study the imprints of new ultralight particles on the gravitational-wave signals emitted by binary black holes. Superradiant instabilities may create large clouds of s

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Searching for General Binary Inspirals with Gravitational Waves

Autor: Horng Sheng Chia, Thomas D. P. Edwards

We study whether binary black hole template banks can be used to search for the gravitational waves emitted by general binary coalescences. To recover binary signals from noisy data, matched-filtering techniques are typically required. This is especi

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Tidal Deformation and Dissipation of Rotating Black Holes

Autor: Horng Sheng Chia

We show that rotating black holes do not experience any tidal deformation when they are perturbed by a weak and adiabatic gravitational field. The tidal deformability of an object is quantified by the so-called "Love numbers", which describe the obje

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Probing ultralight bosons with binary black holes

Autor: Horng Sheng Chia, Daniel Baumann, Rafael A. Porto

Publikováno v: Physical Review D
Physical review / D 99(4), 044001 (2019). doi:10.1103/PhysRevD.99.044001
Physical Review D, 99(4):044001. American Institute of Physics

We study the gravitational-wave (GW) signatures of clouds of ultralight bosons around black holes (BHs) in binary inspirals. These clouds, which are formed via superradiance instabilities for rapidly rotating BHs, produce distinct effects in the popu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::598399dedf12a1c1ba1896c090ad40b0
https://doi.org/10.1103/PhysRevD.99.044001

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The Spectra of Gravitational Atoms

Autor: John Stout, Daniel Baumann, Lotte ter Haar, Horng Sheng Chia

Publikováno v: Journal of Cosmology and Astroparticle Physics, 2019(12):006. IOP Publishing Ltd.

We compute the quasi-bound state spectra of ultralight scalar and vector fields around rotating black holes. These spectra are determined by the gravitational fine structure constant $\alpha$, which is the ratio of the size of the black hole to the C

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